Portland, Oregon, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Portland, Oregon, United States
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
20th Aug 2023
86AQILowest AQI recorded on
6th Aug 2023
13AQISame Day Analysis (12th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 64 of Moderate air quality on the same day.
Day & Night AQI Trend: 12th Aug - 13th Aug 2026
Portland, Oregon, United States
AQI
Day
Night
.
5 AM12th Aug 2026
8 PM
4 AM13th Aug 2026
Day time
Avg. Highest Time
2PM12th Aug
85AQI
Avg. Lowest Time
11AM12th Aug
53AQI
Night time
Avg. Highest Time
9PM12th Aug
85AQI
Avg. Lowest Time
10PM12th Aug
41AQI
In the last 24 hours,
Portland's AQI reached its highest point of 85 at 2 PM during the Day, while the lowest point, 41, was recorded at 10 PM during the Night between 12th Aug and 13th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Portland, Oregon, United States
JulAug
15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th
Day
Night
15th Jul 2026255 AMAQI
15th Jul 2026296 AMAQI
15th Jul 2026267 AMAQI
15th Jul 2026278 AMAQI
15th Jul 2026289 AMAQI
15th Jul 20263110 AMAQI
15th Jul 20263011 AMAQI
15th Jul 20262912 PMAQI
15th Jul 2026301 PMAQI
15th Jul 2026292 PMAQI
15th Jul 2026303 PMAQI
15th Jul 2026314 PMAQI
15th Jul 2026315 PMAQI
15th Jul 2026316 PMAQI
15th Jul 2026307 PMAQI
15th Jul 2026298 PMAQI
15th Jul 2026279 PMAQI
15th Jul 20262510 PMAQI
15th Jul 20262511 PMAQI
16th Jul 20262512 AMAQI
16th Jul 2026271 AMAQI
16th Jul 2026312 AMAQI
16th Jul 2026303 AMAQI
16th Jul 2026294 AMAQI
23°C16/32°C
16th Jul 2026305 AMAQI
16th Jul 2026296 AMAQI
16th Jul 2026327 AMAQI
16th Jul 2026318 AMAQI
16th Jul 2026319 AMAQI
16th Jul 20263110 AMAQI
16th Jul 20263111 AMAQI
16th Jul 20263112 PMAQI
16th Jul 2026301 PMAQI
16th Jul 2026302 PMAQI
16th Jul 2026303 PMAQI
16th Jul 2026264 PMAQI
16th Jul 2026295 PMAQI
16th Jul 2026326 PMAQI
16th Jul 2026297 PMAQI
16th Jul 2026288 PMAQI
16th Jul 2026269 PMAQI
16th Jul 20262510 PMAQI
16th Jul 20262511 PMAQI
17th Jul 20262212 AMAQI
17th Jul 2026211 AMAQI
17th Jul 2026612 AMAQI
17th Jul 20261013 AMAQI
17th Jul 20261074 AMAQI
19°C16/26°C
17th Jul 20261125 AMAQI
17th Jul 2026726 AMAQI
17th Jul 2026727 AMAQI
17th Jul 2026558 AMAQI
17th Jul 2026789 AMAQI
17th Jul 20263310 AMAQI
17th Jul 20267411 AMAQI
17th Jul 20266212 PMAQI
17th Jul 2026541 PMAQI
17th Jul 2026542 PMAQI
17th Jul 2026543 PMAQI
17th Jul 2026474 PMAQI
17th Jul 2026435 PMAQI
17th Jul 2026236 PMAQI
17th Jul 2026497 PMAQI
17th Jul 2026498 PMAQI
17th Jul 2026469 PMAQI
17th Jul 20265210 PMAQI
17th Jul 20264411 PMAQI
18th Jul 20263512 AMAQI
18th Jul 2026521 AMAQI
18th Jul 2026672 AMAQI
18th Jul 2026523 AMAQI
18th Jul 2026674 AMAQI
19°C12/26°C
18th Jul 2026645 AMAQI
18th Jul 2026626 AMAQI
18th Jul 2026687 AMAQI
18th Jul 2026668 AMAQI
18th Jul 2026619 AMAQI
18th Jul 20266610 AMAQI
18th Jul 20267411 AMAQI
18th Jul 20265112 PMAQI
18th Jul 2026581 PMAQI
18th Jul 2026582 PMAQI
18th Jul 2026573 PMAQI
18th Jul 2026534 PMAQI
18th Jul 2026625 PMAQI
18th Jul 2026556 PMAQI
18th Jul 2026587 PMAQI
18th Jul 2026488 PMAQI
18th Jul 2026439 PMAQI
18th Jul 20264210 PMAQI
18th Jul 20264511 PMAQI
19th Jul 20264012 AMAQI
19th Jul 2026371 AMAQI
19th Jul 2026432 AMAQI
19th Jul 2026453 AMAQI
19th Jul 2026634 AMAQI
20°C13/29°C
19th Jul 2026685 AMAQI
19th Jul 2026596 AMAQI
19th Jul 2026517 AMAQI
19th Jul 2026388 AMAQI
19th Jul 2026539 AMAQI
19th Jul 20265310 AMAQI
19th Jul 20265211 AMAQI
19th Jul 20264712 PMAQI
19th Jul 2026591 PMAQI
19th Jul 2026692 PMAQI
19th Jul 2026413 PMAQI
19th Jul 2026554 PMAQI
19th Jul 2026445 PMAQI
19th Jul 2026496 PMAQI
19th Jul 2026717 PMAQI
19th Jul 2026508 PMAQI
19th Jul 2026559 PMAQI
19th Jul 20265810 PMAQI
19th Jul 20264411 PMAQI
20th Jul 20265112 AMAQI
20th Jul 2026621 AMAQI
20th Jul 2026612 AMAQI
20th Jul 2026523 AMAQI
20th Jul 2026634 AMAQI
21°C14/31°C
20th Jul 2026635 AMAQI
20th Jul 2026726 AMAQI
20th Jul 2026747 AMAQI
20th Jul 2026498 AMAQI
20th Jul 2026549 AMAQI
20th Jul 20265010 AMAQI
20th Jul 20265511 AMAQI
20th Jul 20265012 PMAQI
20th Jul 2026401 PMAQI
20th Jul 2026462 PMAQI
20th Jul 2026593 PMAQI
20th Jul 2026454 PMAQI
20th Jul 2026505 PMAQI
20th Jul 2026416 PMAQI
20th Jul 2026427 PMAQI
20th Jul 2026459 PMAQI
20th Jul 20264610 PMAQI
20th Jul 20264311 PMAQI
21st Jul 20264712 AMAQI
21st Jul 2026461 AMAQI
21st Jul 2026472 AMAQI
21st Jul 2026483 AMAQI
21st Jul 2026484 AMAQI
24°C16/34°C
21st Jul 2026485 AMAQI
21st Jul 2026486 AMAQI
21st Jul 2026497 AMAQI
21st Jul 2026508 AMAQI
21st Jul 2026509 AMAQI
21st Jul 20265110 AMAQI
21st Jul 20265211 AMAQI
21st Jul 20265012 PMAQI
21st Jul 2026531 PMAQI
21st Jul 2026562 PMAQI
21st Jul 2026603 PMAQI
21st Jul 2026654 PMAQI
21st Jul 2026725 PMAQI
21st Jul 2026716 PMAQI
21st Jul 2026687 PMAQI
21st Jul 2026738 PMAQI
21st Jul 2026669 PMAQI
21st Jul 20266210 PMAQI
21st Jul 20265711 PMAQI
22nd Jul 20265412 AMAQI
22nd Jul 2026541 AMAQI
22nd Jul 2026532 AMAQI
22nd Jul 2026533 AMAQI
22nd Jul 2026534 AMAQI
28°C17/40°C
22nd Jul 2026555 AMAQI
22nd Jul 2026526 AMAQI
22nd Jul 2026517 AMAQI
22nd Jul 2026518 AMAQI
22nd Jul 2026519 AMAQI
22nd Jul 20265210 AMAQI
22nd Jul 20265511 AMAQI
22nd Jul 20266012 PMAQI
22nd Jul 2026591 PMAQI
22nd Jul 2026622 PMAQI
22nd Jul 2026623 PMAQI
22nd Jul 2026654 PMAQI
22nd Jul 2026645 PMAQI
22nd Jul 2026646 PMAQI
22nd Jul 2026607 PMAQI
22nd Jul 2026588 PMAQI
22nd Jul 2026579 PMAQI
22nd Jul 20265410 PMAQI
22nd Jul 20265111 PMAQI
23rd Jul 20264812 AMAQI
23rd Jul 2026451 AMAQI
23rd Jul 2026422 AMAQI
23rd Jul 2026443 AMAQI
23rd Jul 2026444 AMAQI
29°C21/40°C
23rd Jul 2026435 AMAQI
23rd Jul 2026426 AMAQI
23rd Jul 2026437 AMAQI
23rd Jul 2026438 AMAQI
23rd Jul 2026419 AMAQI
23rd Jul 20264110 AMAQI
23rd Jul 20264311 AMAQI
23rd Jul 20264112 PMAQI
23rd Jul 2026411 PMAQI
23rd Jul 2026522 PMAQI
23rd Jul 2026563 PMAQI
23rd Jul 2026704 PMAQI
23rd Jul 2026255 PMAQI
23rd Jul 2026286 PMAQI
23rd Jul 2026657 PMAQI
23rd Jul 2026668 PMAQI
23rd Jul 2026599 PMAQI
23rd Jul 20266010 PMAQI
23rd Jul 20267111 PMAQI
24th Jul 20263512 AMAQI
24th Jul 2026511 AMAQI
24th Jul 2026502 AMAQI
24th Jul 2026583 AMAQI
24th Jul 2026404 AMAQI
21°C17/27°C
24th Jul 2026415 AMAQI
24th Jul 2026406 AMAQI
24th Jul 2026507 AMAQI
24th Jul 2026648 AMAQI
24th Jul 2026679 AMAQI
24th Jul 20266910 AMAQI
24th Jul 20267211 AMAQI
24th Jul 20266812 PMAQI
24th Jul 2026731 PMAQI
24th Jul 2026692 PMAQI
24th Jul 2026583 PMAQI
24th Jul 2026594 PMAQI
24th Jul 2026675 PMAQI
24th Jul 2026636 PMAQI
24th Jul 2026667 PMAQI
24th Jul 2026648 PMAQI
24th Jul 2026609 PMAQI
24th Jul 20265610 PMAQI
24th Jul 20265611 PMAQI
25th Jul 20265412 AMAQI
25th Jul 2026561 AMAQI
25th Jul 2026672 AMAQI
25th Jul 2026623 AMAQI
25th Jul 2026564 AMAQI
23°C16/33°C
25th Jul 2026605 AMAQI
25th Jul 2026466 AMAQI
25th Jul 2026537 AMAQI
25th Jul 2026628 AMAQI
25th Jul 2026589 AMAQI
25th Jul 20265410 AMAQI
25th Jul 20266311 AMAQI
25th Jul 20266412 PMAQI
25th Jul 2026591 PMAQI
25th Jul 2026672 PMAQI
25th Jul 2026623 PMAQI
25th Jul 2026574 PMAQI
25th Jul 2026695 PMAQI
25th Jul 2026626 PMAQI
25th Jul 2026677 PMAQI
25th Jul 2026808 PMAQI
25th Jul 2026779 PMAQI
25th Jul 20265710 PMAQI
25th Jul 20265511 PMAQI
26th Jul 20265512 AMAQI
26th Jul 2026601 AMAQI
26th Jul 2026552 AMAQI
26th Jul 2026523 AMAQI
26th Jul 2026464 AMAQI
18°C14/23°C
26th Jul 2026655 AMAQI
26th Jul 2026676 AMAQI
26th Jul 2026707 AMAQI
26th Jul 2026678 AMAQI
26th Jul 2026659 AMAQI
26th Jul 20267010 AMAQI
26th Jul 20266011 AMAQI
26th Jul 20266012 PMAQI
26th Jul 2026451 PMAQI
26th Jul 2026602 PMAQI
26th Jul 2026823 PMAQI
26th Jul 2026534 PMAQI
26th Jul 2026565 PMAQI
26th Jul 2026546 PMAQI
26th Jul 2026657 PMAQI
26th Jul 2026568 PMAQI
26th Jul 2026449 PMAQI
26th Jul 20266010 PMAQI
26th Jul 20266111 PMAQI
27th Jul 20265512 AMAQI
27th Jul 2026561 AMAQI
27th Jul 2026242 AMAQI
27th Jul 2026413 AMAQI
27th Jul 2026444 AMAQI
21°C16/29°C
27th Jul 2026545 AMAQI
27th Jul 2026706 AMAQI
27th Jul 2026727 AMAQI
27th Jul 2026688 AMAQI
27th Jul 2026659 AMAQI
27th Jul 20267210 AMAQI
27th Jul 20266911 AMAQI
27th Jul 20266612 PMAQI
27th Jul 2026521 PMAQI
27th Jul 2026682 PMAQI
27th Jul 2026583 PMAQI
27th Jul 2026624 PMAQI
27th Jul 2026655 PMAQI
27th Jul 2026406 PMAQI
27th Jul 2026707 PMAQI
27th Jul 2026698 PMAQI
27th Jul 2026709 PMAQI
27th Jul 20265410 PMAQI
27th Jul 20266311 PMAQI
28th Jul 20266712 AMAQI
28th Jul 2026721 AMAQI
28th Jul 2026672 AMAQI
28th Jul 2026593 AMAQI
28th Jul 2026594 AMAQI
22°C14/31°C
28th Jul 2026675 AMAQI
28th Jul 2026546 AMAQI
28th Jul 2026487 AMAQI
28th Jul 2026568 AMAQI
28th Jul 2026749 AMAQI
28th Jul 20267410 AMAQI
28th Jul 20267111 AMAQI
28th Jul 20266812 PMAQI
28th Jul 2026611 PMAQI
28th Jul 2026512 PMAQI
28th Jul 2026613 PMAQI
28th Jul 2026544 PMAQI
28th Jul 2026475 PMAQI
28th Jul 2026466 PMAQI
28th Jul 2026477 PMAQI
28th Jul 2026438 PMAQI
28th Jul 2026519 PMAQI
28th Jul 20265210 PMAQI
28th Jul 20261811 PMAQI
29th Jul 20261912 AMAQI
29th Jul 2026181 AMAQI
29th Jul 2026222 AMAQI
29th Jul 2026213 AMAQI
29th Jul 2026254 AMAQI
20°C16/27°C
29th Jul 2026685 AMAQI
29th Jul 2026626 AMAQI
29th Jul 2026567 AMAQI
29th Jul 2026598 AMAQI
29th Jul 2026729 AMAQI
29th Jul 20263910 AMAQI
29th Jul 20265711 AMAQI
29th Jul 20267012 PMAQI
29th Jul 2026701 PMAQI
29th Jul 2026702 PMAQI
29th Jul 2026723 PMAQI
29th Jul 2026334 PMAQI
29th Jul 2026465 PMAQI
29th Jul 2026566 PMAQI
29th Jul 2026597 PMAQI
29th Jul 2026438 PMAQI
29th Jul 2026359 PMAQI
29th Jul 20266810 PMAQI
29th Jul 20263611 PMAQI
30th Jul 20263412 AMAQI
30th Jul 2026561 AMAQI
30th Jul 2026672 AMAQI
30th Jul 2026533 AMAQI
30th Jul 2026444 AMAQI
20°C14/29°C
30th Jul 2026525 AMAQI
30th Jul 2026636 AMAQI
30th Jul 2026707 AMAQI
30th Jul 2026658 AMAQI
30th Jul 2026669 AMAQI
30th Jul 20266810 AMAQI
30th Jul 20266511 AMAQI
30th Jul 20266812 PMAQI
30th Jul 2026701 PMAQI
30th Jul 2026652 PMAQI
30th Jul 2026633 PMAQI
30th Jul 2026694 PMAQI
30th Jul 2026625 PMAQI
30th Jul 2026656 PMAQI
30th Jul 2026667 PMAQI
30th Jul 2026668 PMAQI
30th Jul 2026779 PMAQI
30th Jul 20266610 PMAQI
30th Jul 20265111 PMAQI
31st Jul 20265412 AMAQI
31st Jul 2026491 AMAQI
31st Jul 2026522 AMAQI
31st Jul 2026383 AMAQI
31st Jul 2026424 AMAQI
21°C13/30°C
31st Jul 2026635 AMAQI
31st Jul 2026626 AMAQI
31st Jul 2026617 AMAQI
31st Jul 2026638 AMAQI
31st Jul 2026609 AMAQI
31st Jul 20264110 AMAQI
31st Jul 20266011 AMAQI
31st Jul 20267112 PMAQI
31st Jul 2026431 PMAQI
31st Jul 2026532 PMAQI
31st Jul 2026563 PMAQI
31st Jul 2026534 PMAQI
31st Jul 2026365 PMAQI
31st Jul 2026336 PMAQI
31st Jul 2026367 PMAQI
31st Jul 2026428 PMAQI
31st Jul 2026489 PMAQI
31st Jul 20265510 PMAQI
31st Jul 20264911 PMAQI
1st Aug 20265312 AMAQI
1st Aug 2026441 AMAQI
1st Aug 2026482 AMAQI
1st Aug 2026623 AMAQI
1st Aug 2026564 AMAQI
23°C14/33°C
1st Aug 2026665 AMAQI
1st Aug 2026496 AMAQI
1st Aug 2026677 AMAQI
1st Aug 2026628 AMAQI
1st Aug 2026669 AMAQI
1st Aug 20267010 AMAQI
1st Aug 20266911 AMAQI
1st Aug 20268012 PMAQI
1st Aug 2026661 PMAQI
1st Aug 2026542 PMAQI
1st Aug 2026423 PMAQI
1st Aug 2026194 PMAQI
1st Aug 2026255 PMAQI
1st Aug 2026366 PMAQI
1st Aug 2026457 PMAQI
1st Aug 2026238 PMAQI
1st Aug 2026219 PMAQI
1st Aug 20261910 PMAQI
1st Aug 20261811 PMAQI
2nd Aug 20265412 AMAQI
2nd Aug 2026501 AMAQI
2nd Aug 2026592 AMAQI
2nd Aug 2026503 AMAQI
2nd Aug 2026464 AMAQI
19°C16/23°C
2nd Aug 2026425 AMAQI
2nd Aug 2026206 AMAQI
2nd Aug 2026547 AMAQI
2nd Aug 2026648 AMAQI
2nd Aug 2026669 AMAQI
2nd Aug 20266810 AMAQI
2nd Aug 20267111 AMAQI
2nd Aug 20266412 PMAQI
2nd Aug 2026601 PMAQI
2nd Aug 2026542 PMAQI
2nd Aug 2026543 PMAQI
2nd Aug 2026524 PMAQI
2nd Aug 2026395 PMAQI
2nd Aug 2026256 PMAQI
2nd Aug 2026207 PMAQI
2nd Aug 2026458 PMAQI
2nd Aug 2026599 PMAQI
2nd Aug 20266710 PMAQI
2nd Aug 20265811 PMAQI
3rd Aug 20266312 AMAQI
3rd Aug 2026671 AMAQI
3rd Aug 2026712 AMAQI
3rd Aug 2026503 AMAQI
3rd Aug 2026584 AMAQI
18°C12/25°C
3rd Aug 2026575 AMAQI
3rd Aug 2026566 AMAQI
3rd Aug 2026557 AMAQI
3rd Aug 2026588 AMAQI
3rd Aug 2026509 AMAQI
3rd Aug 20265210 AMAQI
3rd Aug 20266211 AMAQI
3rd Aug 20267412 PMAQI
3rd Aug 2026461 PMAQI
3rd Aug 2026522 PMAQI
3rd Aug 2026643 PMAQI
3rd Aug 2026704 PMAQI
3rd Aug 2026715 PMAQI
3rd Aug 2026676 PMAQI
3rd Aug 2026677 PMAQI
3rd Aug 2026698 PMAQI
3rd Aug 2026659 PMAQI
3rd Aug 20266410 PMAQI
3rd Aug 20266911 PMAQI
4th Aug 20267412 AMAQI
4th Aug 2026741 AMAQI
4th Aug 2026752 AMAQI
4th Aug 2026723 AMAQI
4th Aug 2026684 AMAQI
19°C12/30°C
4th Aug 2026695 AMAQI
4th Aug 2026716 AMAQI
4th Aug 2026797 AMAQI
4th Aug 2026758 AMAQI
4th Aug 2026829 AMAQI
4th Aug 20267110 AMAQI
4th Aug 20267211 AMAQI
4th Aug 20267412 PMAQI
4th Aug 2026771 PMAQI
4th Aug 2026682 PMAQI
4th Aug 2026673 PMAQI
4th Aug 2026584 PMAQI
4th Aug 2026715 PMAQI
4th Aug 2026756 PMAQI
4th Aug 2026737 PMAQI
4th Aug 2026718 PMAQI
4th Aug 2026659 PMAQI
4th Aug 20267010 PMAQI
4th Aug 20267111 PMAQI
5th Aug 20266512 AMAQI
5th Aug 2026701 AMAQI
5th Aug 2026702 AMAQI
5th Aug 2026733 AMAQI
5th Aug 2026744 AMAQI
22°C14/33°C
5th Aug 2026765 AMAQI
5th Aug 2026736 AMAQI
5th Aug 2026717 AMAQI
5th Aug 2026738 AMAQI
5th Aug 2026719 AMAQI
5th Aug 20267210 AMAQI
5th Aug 20267111 AMAQI
5th Aug 20266912 PMAQI
5th Aug 2026711 PMAQI
5th Aug 2026782 PMAQI
5th Aug 2026803 PMAQI
5th Aug 2026764 PMAQI
5th Aug 2026845 PMAQI
5th Aug 2026796 PMAQI
5th Aug 2026717 PMAQI
5th Aug 2026718 PMAQI
5th Aug 2026699 PMAQI
5th Aug 20266810 PMAQI
5th Aug 20266511 PMAQI
6th Aug 20266612 AMAQI
6th Aug 2026761 AMAQI
6th Aug 2026722 AMAQI
6th Aug 2026723 AMAQI
6th Aug 2026734 AMAQI
24°C15/35°C
6th Aug 2026765 AMAQI
6th Aug 2026726 AMAQI
6th Aug 2026647 AMAQI
6th Aug 2026708 AMAQI
6th Aug 2026779 AMAQI
6th Aug 20267210 AMAQI
6th Aug 20267511 AMAQI
6th Aug 20267212 PMAQI
6th Aug 2026791 PMAQI
6th Aug 2026742 PMAQI
6th Aug 2026753 PMAQI
6th Aug 2026764 PMAQI
6th Aug 2026755 PMAQI
6th Aug 2026716 PMAQI
6th Aug 2026737 PMAQI
6th Aug 2026768 PMAQI
6th Aug 2026679 PMAQI
6th Aug 20266710 PMAQI
6th Aug 20266211 PMAQI
7th Aug 20265912 AMAQI
7th Aug 2026571 AMAQI
7th Aug 2026562 AMAQI
7th Aug 2026543 AMAQI
7th Aug 2026544 AMAQI
25°C15/36°C
7th Aug 2026525 AMAQI
7th Aug 2026536 AMAQI
7th Aug 2026547 AMAQI
7th Aug 2026538 AMAQI
7th Aug 2026529 AMAQI
7th Aug 20264810 AMAQI
7th Aug 20265011 AMAQI
7th Aug 20265212 PMAQI
7th Aug 2026511 PMAQI
7th Aug 2026542 PMAQI
7th Aug 2026553 PMAQI
7th Aug 2026584 PMAQI
7th Aug 2026555 PMAQI
7th Aug 2026536 PMAQI
7th Aug 2026527 PMAQI
7th Aug 2026528 PMAQI
7th Aug 2026539 PMAQI
7th Aug 20265210 PMAQI
7th Aug 20265311 PMAQI
8th Aug 20265312 AMAQI
8th Aug 2026541 AMAQI
8th Aug 2026512 AMAQI
8th Aug 2026503 AMAQI
8th Aug 2026524 AMAQI
24°C16/34°C
8th Aug 2026495 AMAQI
8th Aug 2026536 AMAQI
8th Aug 2026527 AMAQI
8th Aug 2026478 AMAQI
8th Aug 2026409 AMAQI
8th Aug 20262510 AMAQI
8th Aug 20262811 AMAQI
8th Aug 20262612 PMAQI
8th Aug 2026371 PMAQI
8th Aug 2026562 PMAQI
8th Aug 2026573 PMAQI
8th Aug 2026534 PMAQI
8th Aug 2026505 PMAQI
8th Aug 2026466 PMAQI
8th Aug 2026467 PMAQI
8th Aug 2026668 PMAQI
8th Aug 2026589 PMAQI
8th Aug 20265210 PMAQI
8th Aug 20267111 PMAQI
9th Aug 20268712 AMAQI
9th Aug 2026821 AMAQI
9th Aug 2026772 AMAQI
9th Aug 2026663 AMAQI
9th Aug 2026864 AMAQI
23°C16/34°C
9th Aug 2026835 AMAQI
9th Aug 2026726 AMAQI
9th Aug 2026707 AMAQI
9th Aug 2026758 AMAQI
9th Aug 2026599 AMAQI
9th Aug 20267910 AMAQI
9th Aug 20268011 AMAQI
9th Aug 20266312 PMAQI
9th Aug 2026881 PMAQI
9th Aug 20261102 PMAQI
9th Aug 20261113 PMAQI
9th Aug 2026614 PMAQI
9th Aug 2026235 PMAQI
9th Aug 2026676 PMAQI
9th Aug 20261137 PMAQI
9th Aug 20261098 PMAQI
9th Aug 2026619 PMAQI
9th Aug 20266010 PMAQI
9th Aug 20266011 PMAQI
10th Aug 20265512 AMAQI
10th Aug 2026621 AMAQI
10th Aug 2026622 AMAQI
10th Aug 2026453 AMAQI
10th Aug 2026764 AMAQI
21°C14/31°C
10th Aug 2026825 AMAQI
10th Aug 2026556 AMAQI
10th Aug 2026587 AMAQI
10th Aug 2026688 AMAQI
10th Aug 2026749 AMAQI
10th Aug 20267010 AMAQI
10th Aug 20265911 AMAQI
10th Aug 20265512 PMAQI
10th Aug 2026601 PMAQI
10th Aug 2026682 PMAQI
10th Aug 2026763 PMAQI
10th Aug 2026714 PMAQI
10th Aug 2026525 PMAQI
10th Aug 2026786 PMAQI
10th Aug 2026747 PMAQI
10th Aug 2026758 PMAQI
10th Aug 2026699 PMAQI
10th Aug 20264910 PMAQI
10th Aug 20266211 PMAQI
11th Aug 20265912 AMAQI
11th Aug 2026511 AMAQI
11th Aug 2026652 AMAQI
11th Aug 2026763 AMAQI
11th Aug 2026714 AMAQI
20°C14/29°C
11th Aug 2026815 AMAQI
11th Aug 2026756 AMAQI
11th Aug 2026777 AMAQI
11th Aug 2026708 AMAQI
11th Aug 2026689 AMAQI
11th Aug 20267310 AMAQI
11th Aug 20267011 AMAQI
11th Aug 20266612 PMAQI
11th Aug 2026691 PMAQI
11th Aug 2026662 PMAQI
11th Aug 2026623 PMAQI
11th Aug 2026594 PMAQI
11th Aug 2026415 PMAQI
11th Aug 2026466 PMAQI
11th Aug 2026477 PMAQI
11th Aug 2026508 PMAQI
11th Aug 2026539 PMAQI
11th Aug 20265210 PMAQI
11th Aug 20264411 PMAQI
12th Aug 20266512 AMAQI
12th Aug 2026581 AMAQI
12th Aug 2026672 AMAQI
12th Aug 2026653 AMAQI
12th Aug 2026584 AMAQI
21°C14/31°C
12th Aug 2026465 AMAQI
12th Aug 2026606 AMAQI
12th Aug 2026727 AMAQI
12th Aug 2026718 AMAQI
12th Aug 2026619 AMAQI
12th Aug 20268010 AMAQI
12th Aug 20265311 AMAQI
12th Aug 20265912 PMAQI
12th Aug 2026671 PMAQI
12th Aug 2026852 PMAQI
12th Aug 2026653 PMAQI
12th Aug 2026664 PMAQI
12th Aug 2026575 PMAQI
12th Aug 2026676 PMAQI
12th Aug 2026687 PMAQI
12th Aug 2026678 PMAQI
12th Aug 2026859 PMAQI
12th Aug 20264110 PMAQI
12th Aug 20265211 PMAQI
13th Aug 20266312 AMAQI
13th Aug 2026651 AMAQI
13th Aug 2026622 AMAQI
13th Aug 2026553 AMAQI
13th Aug 2026754 AMAQI
21°C17/28°C
13th Aug 2026545 AMAQI
5 AM13th Aug 2026616 AMAQI
13th Aug 2026707 AMAQI
13th Aug 2026528 AMAQI
13th Aug 2026849 AMAQI
13th Aug 20267710 AMAQI
13th Aug 20266611 AMAQI
13th Aug 20266512 PMAQI
12 PM13th Aug 2026651 PMAQI
13th Aug 2026852 PMAQI
13th Aug 2026763 PMAQI
13th Aug 2026444 PMAQI
13th Aug 2026495 PMAQI
13th Aug 2026566 PMAQI
13th Aug 2026597 PMAQI
13th Aug 2026618 PMAQI
8 PM13th Aug 2026579 PMAQI
13th Aug 20265110 PMAQI
13th Aug 20264911 PMAQI
12 AM
4 AM
21°C15/31°C
Day time
Avg. Highest Time
2 PM - 3 PM
62AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
5 PM - 6 PM
53AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 3 PM (Avg. 62), while the lowest AQI was between 5 PM to 6 PM (Avg. 53).
Night time
Avg. Highest Time
4 AM - 9 PM
57AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
12 AM
51AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 9 PM (Avg. 57), while the lowest AQI was between 12 AM to 12 AM (Avg. 51).
2026 Days Vs Air Quality
Portland, Oregon, United States
2026
85%
188
15%
33
Total number of days with different AQI categories in last 225 days in 2026 (140 days remaining)
Good
188 DaysModerate
33 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 225 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Portland, Oregon, United States
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
33AQI (US)
33AQI (US)
2nd January 2026
21AQI (US)
21AQI (US)
3rd January 2026
26AQI (US)
26AQI (US)
4th January 2026
12AQI (US)
12AQI (US)
5th January 2026
21AQI (US)
21AQI (US)
6th January 2026
27AQI (US)
27AQI (US)
7th January 2026
11AQI (US)
11AQI (US)
8th January 2026
13AQI (US)
13AQI (US)
9th January 2026
15AQI (US)
15AQI (US)
10th January 2026
47AQI (US)
47AQI (US)
11th January 2026
47AQI (US)
47AQI (US)
12th January 2026
39AQI (US)
39AQI (US)
13th January 2026
57AQI (US)
57AQI (US)
14th January 2026
56AQI (US)
56AQI (US)
15th January 2026
38AQI (US)
38AQI (US)
16th January 2026
17AQI (US)
17AQI (US)
17th January 2026
20AQI (US)
20AQI (US)
18th January 2026
25AQI (US)
25AQI (US)
19th January 2026
21AQI (US)
21AQI (US)
20th January 2026
26AQI (US)
26AQI (US)
21st January 2026
27AQI (US)
27AQI (US)
22nd January 2026
49AQI (US)
49AQI (US)
23rd January 2026
53AQI (US)
53AQI (US)
24th January 2026
49AQI (US)
49AQI (US)
25th January 2026
46AQI (US)
46AQI (US)
26th January 2026
47AQI (US)
47AQI (US)
27th January 2026
44AQI (US)
44AQI (US)
28th January 2026
47AQI (US)
47AQI (US)
29th January 2026
52AQI (US)
52AQI (US)
30th January 2026
49AQI (US)
49AQI (US)
31st January 2026
45AQI (US)
45AQI (US)
1st February 2026
48AQI (US)
48AQI (US)
2nd February 2026
49AQI (US)
49AQI (US)
3rd February 2026
49AQI (US)
49AQI (US)
4th February 2026
48AQI (US)
48AQI (US)
5th February 2026
48AQI (US)
48AQI (US)
6th February 2026
40AQI (US)
40AQI (US)
7th February 2026
41AQI (US)
41AQI (US)
8th February 2026
47AQI (US)
47AQI (US)
9th February 2026
46AQI (US)
46AQI (US)
10th February 2026
47AQI (US)
47AQI (US)
11th February 2026
45AQI (US)
45AQI (US)
12th February 2026
45AQI (US)
45AQI (US)
13th February 2026
52AQI (US)
52AQI (US)
14th February 2026
49AQI (US)
49AQI (US)
15th February 2026
40AQI (US)
40AQI (US)
16th February 2026
45AQI (US)
45AQI (US)
17th February 2026
46AQI (US)
46AQI (US)
18th February 2026
42AQI (US)
42AQI (US)
19th February 2026
42AQI (US)
42AQI (US)
20th February 2026
41AQI (US)
41AQI (US)
21st February 2026
36AQI (US)
36AQI (US)
22nd February 2026
37AQI (US)
37AQI (US)
23rd February 2026
41AQI (US)
41AQI (US)
24th February 2026
45AQI (US)
45AQI (US)
25th February 2026
42AQI (US)
42AQI (US)
26th February 2026
35AQI (US)
35AQI (US)
27th February 2026
35AQI (US)
35AQI (US)
28th February 2026
39AQI (US)
39AQI (US)
1st March 2026
42AQI (US)
42AQI (US)
2nd March 2026
54AQI (US)
54AQI (US)
3rd March 2026
46AQI (US)
46AQI (US)
4th March 2026
46AQI (US)
46AQI (US)
5th March 2026
42AQI (US)
42AQI (US)
6th March 2026
38AQI (US)
38AQI (US)
7th March 2026
41AQI (US)
41AQI (US)
8th March 2026
40AQI (US)
40AQI (US)
9th March 2026
40AQI (US)
40AQI (US)
10th March 2026
35AQI (US)
35AQI (US)
11th March 2026
43AQI (US)
43AQI (US)
12th March 2026
42AQI (US)
42AQI (US)
13th March 2026
40AQI (US)
40AQI (US)
14th March 2026
36AQI (US)
36AQI (US)
15th March 2026
36AQI (US)
36AQI (US)
16th March 2026
37AQI (US)
37AQI (US)
17th March 2026
34AQI (US)
34AQI (US)
18th March 2026
32AQI (US)
32AQI (US)
19th March 2026
32AQI (US)
32AQI (US)
20th March 2026
38AQI (US)
38AQI (US)
21st March 2026
36AQI (US)
36AQI (US)
22nd March 2026
36AQI (US)
36AQI (US)
23rd March 2026
40AQI (US)
40AQI (US)
24th March 2026
37AQI (US)
37AQI (US)
25th March 2026
33AQI (US)
33AQI (US)
26th March 2026
30AQI (US)
30AQI (US)
27th March 2026
31AQI (US)
31AQI (US)
28th March 2026
34AQI (US)
34AQI (US)
29th March 2026
30AQI (US)
30AQI (US)
30th March 2026
27AQI (US)
27AQI (US)
31st March 2026
26AQI (US)
26AQI (US)
1st April 2026
33AQI (US)
33AQI (US)
2nd April 2026
34AQI (US)
34AQI (US)
3rd April 2026
27AQI (US)
27AQI (US)
4th April 2026
31AQI (US)
31AQI (US)
5th April 2026
28AQI (US)
28AQI (US)
6th April 2026
27AQI (US)
27AQI (US)
7th April 2026
27AQI (US)
27AQI (US)
8th April 2026
31AQI (US)
31AQI (US)
9th April 2026
28AQI (US)
28AQI (US)
10th April 2026
32AQI (US)
32AQI (US)
11th April 2026
33AQI (US)
33AQI (US)
12th April 2026
28AQI (US)
28AQI (US)
13th April 2026
34AQI (US)
34AQI (US)
14th April 2026
35AQI (US)
35AQI (US)
15th April 2026
33AQI (US)
33AQI (US)
16th April 2026
30AQI (US)
30AQI (US)
17th April 2026
18th April 2026
32AQI (US)
32AQI (US)
19th April 2026
34AQI (US)
34AQI (US)
20th April 2026
28AQI (US)
28AQI (US)
21st April 2026
28AQI (US)
28AQI (US)
22nd April 2026
23rd April 2026
25AQI (US)
25AQI (US)
24th April 2026
29AQI (US)
29AQI (US)
25th April 2026
30AQI (US)
30AQI (US)
26th April 2026
33AQI (US)
33AQI (US)
27th April 2026
27AQI (US)
27AQI (US)
28th April 2026
24AQI (US)
24AQI (US)
29th April 2026
24AQI (US)
24AQI (US)
30th April 2026
26AQI (US)
26AQI (US)
1st May 2026
27AQI (US)
27AQI (US)
2nd May 2026
24AQI (US)
24AQI (US)
3rd May 2026
23AQI (US)
23AQI (US)
4th May 2026
29AQI (US)
29AQI (US)
5th May 2026
33AQI (US)
33AQI (US)
6th May 2026
31AQI (US)
31AQI (US)
7th May 2026
28AQI (US)
28AQI (US)
8th May 2026
28AQI (US)
28AQI (US)
9th May 2026
10th May 2026
34AQI (US)
34AQI (US)
11th May 2026
31AQI (US)
31AQI (US)
12th May 2026
28AQI (US)
28AQI (US)
13th May 2026
29AQI (US)
29AQI (US)
14th May 2026
25AQI (US)
25AQI (US)
15th May 2026
46AQI (US)
46AQI (US)
16th May 2026
52AQI (US)
52AQI (US)
17th May 2026
58AQI (US)
58AQI (US)
18th May 2026
57AQI (US)
57AQI (US)
19th May 2026
55AQI (US)
55AQI (US)
20th May 2026
49AQI (US)
49AQI (US)
21st May 2026
40AQI (US)
40AQI (US)
22nd May 2026
49AQI (US)
49AQI (US)
23rd May 2026
49AQI (US)
49AQI (US)
24th May 2026
46AQI (US)
46AQI (US)
25th May 2026
43AQI (US)
43AQI (US)
26th May 2026
27AQI (US)
27AQI (US)
27th May 2026
28AQI (US)
28AQI (US)
28th May 2026
27AQI (US)
27AQI (US)
29th May 2026
26AQI (US)
26AQI (US)
30th May 2026
28AQI (US)
28AQI (US)
31st May 2026
29AQI (US)
29AQI (US)
1st June 2026
31AQI (US)
31AQI (US)
2nd June 2026
31AQI (US)
31AQI (US)
3rd June 2026
29AQI (US)
29AQI (US)
4th June 2026
25AQI (US)
25AQI (US)
5th June 2026
27AQI (US)
27AQI (US)
6th June 2026
25AQI (US)
25AQI (US)
7th June 2026
24AQI (US)
24AQI (US)
8th June 2026
26AQI (US)
26AQI (US)
9th June 2026
26AQI (US)
26AQI (US)
10th June 2026
27AQI (US)
27AQI (US)
11th June 2026
27AQI (US)
27AQI (US)
12th June 2026
27AQI (US)
27AQI (US)
13th June 2026
25AQI (US)
25AQI (US)
14th June 2026
24AQI (US)
24AQI (US)
15th June 2026
26AQI (US)
26AQI (US)
16th June 2026
27AQI (US)
27AQI (US)
17th June 2026
28AQI (US)
28AQI (US)
18th June 2026
27AQI (US)
27AQI (US)
19th June 2026
25AQI (US)
25AQI (US)
20th June 2026
24AQI (US)
24AQI (US)
21st June 2026
22AQI (US)
22AQI (US)
22nd June 2026
25AQI (US)
25AQI (US)
23rd June 2026
25AQI (US)
25AQI (US)
24th June 2026
24AQI (US)
24AQI (US)
25th June 2026
25AQI (US)
25AQI (US)
26th June 2026
27AQI (US)
27AQI (US)
27th June 2026
30AQI (US)
30AQI (US)
28th June 2026
27AQI (US)
27AQI (US)
29th June 2026
25AQI (US)
25AQI (US)
30th June 2026
26AQI (US)
26AQI (US)
1st July 2026
26AQI (US)
26AQI (US)
2nd July 2026
27AQI (US)
27AQI (US)
3rd July 2026
28AQI (US)
28AQI (US)
4th July 2026
25AQI (US)
25AQI (US)
5th July 2026
25AQI (US)
25AQI (US)
6th July 2026
28AQI (US)
28AQI (US)
7th July 2026
29AQI (US)
29AQI (US)
8th July 2026
27AQI (US)
27AQI (US)
9th July 2026
29AQI (US)
29AQI (US)
10th July 2026
32AQI (US)
32AQI (US)
11th July 2026
30AQI (US)
30AQI (US)
12th July 2026
29AQI (US)
29AQI (US)
13th July 2026
30AQI (US)
30AQI (US)
14th July 2026
30AQI (US)
30AQI (US)
15th July 2026
28AQI (US)
28AQI (US)
16th July 2026
29AQI (US)
29AQI (US)
17th July 2026
58AQI (US)
58AQI (US)
18th July 2026
57AQI (US)
57AQI (US)
19th July 2026
52AQI (US)
52AQI (US)
20th July 2026
53AQI (US)
53AQI (US)
21st July 2026
56AQI (US)
56AQI (US)
22nd July 2026
56AQI (US)
56AQI (US)
23rd July 2026
48AQI (US)
48AQI (US)
24th July 2026
58AQI (US)
58AQI (US)
25th July 2026
61AQI (US)
61AQI (US)
26th July 2026
60AQI (US)
60AQI (US)
27th July 2026
60AQI (US)
60AQI (US)
28th July 2026
57AQI (US)
57AQI (US)
29th July 2026
49AQI (US)
49AQI (US)
30th July 2026
62AQI (US)
62AQI (US)
31st July 2026
51AQI (US)
51AQI (US)
1st August 2026
48AQI (US)
48AQI (US)
2nd August 2026
52AQI (US)
52AQI (US)
3rd August 2026
62AQI (US)
62AQI (US)
4th August 2026
72AQI (US)
72AQI (US)
5th August 2026
73AQI (US)
73AQI (US)
6th August 2026
72AQI (US)
72AQI (US)
7th August 2026
54AQI (US)
54AQI (US)
8th August 2026
49AQI (US)
49AQI (US)
9th August 2026
77AQI (US)
77AQI (US)
10th August 2026
65AQI (US)
65AQI (US)
11th August 2026
62AQI (US)
62AQI (US)
12th August 2026
64AQI (US)
64AQI (US)
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
35AQI (US)
44AQI (US)
37AQI (US)
30AQI (US)
36AQI (US)
26AQI (US)
42AQI (US)
63AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202637AQI (US)
27
4
27
1
30
1
28
26
4
30
18
13
2
10
188
33
Highest AQI (US) recorded in
August63AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202529AQI (US)
26
5
28
24
7
30
31
30
31
30
1
27
3
26
5
22
8
26
5
331
34
Highest AQI (US) recorded in
November40AQI (US)
Lowest AQI (US) recorded in
May19AQI (US)
202423AQI (US)
31
29
31
30
31
29
31
31
27
3
30
1
27
3
31
358
7
Highest AQI (US) recorded in
November32AQI (US)
Lowest AQI (US) recorded in
June16AQI (US)
202324AQI (US)
28
3
22
6
31
30
31
30
31
27
4
30
31
29
31
351
13
Highest AQI (US) recorded in
February32AQI (US)
Lowest AQI (US) recorded in
June19AQI (US)
202229AQI (US)
28
1
17
5
29
2
17
31
30
21
3
26
2
1
18
10
2
1
27
3
27
4
274
27
3
1
Highest AQI (US) recorded in
October55AQI (US)
Lowest AQI (US) recorded in
May15AQI (US)
202129AQI (US)
14
16
1
20
8
25
6
30
31
30
31
30
1
29
1
30
1
26
4
31
327
37
1
Highest AQI (US) recorded in
January58AQI (US)
Lowest AQI (US) recorded in
May18AQI (US)
202036AQI (US)
12
1
20
18
30
31
31
18
4
1
2
5
25
6
23
7
31
239
18
1
2
5
Highest AQI (US) recorded in
September111AQI (US)
Lowest AQI (US) recorded in
June16AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2026(Avg.)
37AQI (US)Least Polluted Year Recorded
2024(Avg.)
23AQI (US)Portland's annual 2026 AQI (US) (37) shows an average percentage change of 33.4% (worsened AQI (US)) compared to previous years: 2020 (36), 2021 (29), 2022 (29), 2023 (24), 2024 (23), 2025 (29).
