Hillsboro, 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
Hillsboro, Oregon, United States
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
20th Aug 2023
111AQILowest AQI recorded on
16th Aug 2024
9AQISame Day Analysis (8th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 49 of Good air quality on the same day.
Day & Night AQI Trend: 8th Aug - 9th Aug 2026
Hillsboro, Oregon, United States
AQI
Day
Night
.
5 AM8th Aug 2026
8 PM
4 AM9th Aug 2026
Day time
Avg. Highest Time
6AM8th Aug
55AQI
Avg. Lowest Time
4PM8th Aug
40AQI
Night time
Avg. Highest Time
5AM8th Aug
53AQI
Avg. Lowest Time
3AM9th Aug
21AQI
In the last 24 hours,
Hillsboro's AQI reached its highest point of 55 at 6 AM during the Day, while the lowest point, 21, was recorded at 3 AM during the Night between 8th Aug and 9th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Hillsboro, Oregon, United States
JulAug
11th - 12th12th - 13th13th - 14th14th - 15th15th - 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
Day
Night
11th Jul 2026325 AMAQI
11th Jul 2026346 AMAQI
11th Jul 2026347 AMAQI
11th Jul 2026348 AMAQI
11th Jul 2026339 AMAQI
11th Jul 20263310 AMAQI
11th Jul 20263011 AMAQI
11th Jul 20262812 PMAQI
11th Jul 2026321 PMAQI
11th Jul 2026322 PMAQI
11th Jul 2026323 PMAQI
11th Jul 2026324 PMAQI
11th Jul 2026325 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026297 PMAQI
11th Jul 2026268 PMAQI
11th Jul 2026249 PMAQI
11th Jul 20262210 PMAQI
11th Jul 20262611 PMAQI
12th Jul 20262612 AMAQI
12th Jul 2026281 AMAQI
12th Jul 2026302 AMAQI
12th Jul 2026303 AMAQI
12th Jul 2026304 AMAQI
19°C15/26°C
12th Jul 2026325 AMAQI
12th Jul 2026326 AMAQI
12th Jul 2026327 AMAQI
12th Jul 2026348 AMAQI
12th Jul 2026329 AMAQI
12th Jul 20263110 AMAQI
12th Jul 20263011 AMAQI
12th Jul 20262812 PMAQI
12th Jul 2026321 PMAQI
12th Jul 2026292 PMAQI
12th Jul 2026303 PMAQI
12th Jul 2026284 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026326 PMAQI
12th Jul 2026287 PMAQI
12th Jul 2026298 PMAQI
12th Jul 2026259 PMAQI
12th Jul 20262310 PMAQI
12th Jul 20262211 PMAQI
13th Jul 20262612 AMAQI
13th Jul 2026301 AMAQI
13th Jul 2026322 AMAQI
13th Jul 2026323 AMAQI
13th Jul 2026324 AMAQI
19°C11/28°C
13th Jul 2026335 AMAQI
13th Jul 2026326 AMAQI
13th Jul 2026387 AMAQI
13th Jul 2026348 AMAQI
13th Jul 2026349 AMAQI
13th Jul 20263410 AMAQI
13th Jul 20263511 AMAQI
13th Jul 20262812 PMAQI
13th Jul 2026321 PMAQI
13th Jul 2026302 PMAQI
13th Jul 2026343 PMAQI
13th Jul 2026304 PMAQI
13th Jul 2026345 PMAQI
13th Jul 2026356 PMAQI
13th Jul 2026287 PMAQI
13th Jul 2026268 PMAQI
13th Jul 2026249 PMAQI
13th Jul 20262210 PMAQI
13th Jul 20262011 PMAQI
14th Jul 20262412 AMAQI
14th Jul 2026311 AMAQI
14th Jul 2026322 AMAQI
14th Jul 2026323 AMAQI
14th Jul 2026304 AMAQI
22°C12/32°C
14th Jul 2026325 AMAQI
14th Jul 2026346 AMAQI
14th Jul 2026367 AMAQI
14th Jul 2026348 AMAQI
14th Jul 2026329 AMAQI
14th Jul 20263610 AMAQI
14th Jul 20263411 AMAQI
14th Jul 20262812 PMAQI
14th Jul 2026341 PMAQI
14th Jul 2026262 PMAQI
14th Jul 2026343 PMAQI
14th Jul 2026324 PMAQI
14th Jul 2026325 PMAQI
14th Jul 2026316 PMAQI
14th Jul 2026267 PMAQI
14th Jul 2026268 PMAQI
14th Jul 2026229 PMAQI
14th Jul 20262010 PMAQI
14th Jul 20262011 PMAQI
15th Jul 20262412 AMAQI
15th Jul 2026261 AMAQI
15th Jul 2026282 AMAQI
15th Jul 2026223 AMAQI
15th Jul 2026284 AMAQI
23°C14/33°C
15th Jul 2026245 AMAQI
15th Jul 2026306 AMAQI
15th Jul 2026267 AMAQI
15th Jul 2026268 AMAQI
15th Jul 2026289 AMAQI
15th Jul 20263010 AMAQI
15th Jul 20263211 AMAQI
15th Jul 20262612 PMAQI
15th Jul 2026301 PMAQI
15th Jul 2026282 PMAQI
15th Jul 2026323 PMAQI
15th Jul 2026314 PMAQI
15th Jul 2026325 PMAQI
15th Jul 2026316 PMAQI
15th Jul 2026307 PMAQI
15th Jul 2026288 PMAQI
15th Jul 2026289 PMAQI
15th Jul 20262410 PMAQI
15th Jul 20262611 PMAQI
16th Jul 20262212 AMAQI
16th Jul 2026261 AMAQI
16th Jul 2026302 AMAQI
16th Jul 2026303 AMAQI
16th Jul 2026294 AMAQI
24°C15/33°C
16th Jul 2026305 AMAQI
16th Jul 2026286 AMAQI
16th Jul 2026337 AMAQI
16th Jul 2026318 AMAQI
16th Jul 2026309 AMAQI
16th Jul 20262910 AMAQI
16th Jul 20263011 AMAQI
16th Jul 20263212 PMAQI
16th Jul 2026301 PMAQI
16th Jul 2026312 PMAQI
16th Jul 2026313 PMAQI
16th Jul 2026264 PMAQI
16th Jul 2026285 PMAQI
16th Jul 2026306 PMAQI
16th Jul 2026287 PMAQI
16th Jul 2026288 PMAQI
16th Jul 2026269 PMAQI
16th Jul 20262410 PMAQI
16th Jul 20262411 PMAQI
17th Jul 20261812 AMAQI
17th Jul 2026221 AMAQI
17th Jul 2026722 AMAQI
17th Jul 2026643 AMAQI
17th Jul 2026764 AMAQI
19°C17/24°C
17th Jul 2026675 AMAQI
17th Jul 2026746 AMAQI
17th Jul 2026727 AMAQI
17th Jul 2026568 AMAQI
17th Jul 2026809 AMAQI
17th Jul 20263410 AMAQI
17th Jul 20267611 AMAQI
17th Jul 20265412 PMAQI
17th Jul 2026541 PMAQI
17th Jul 2026542 PMAQI
17th Jul 2026543 PMAQI
17th Jul 2026404 PMAQI
17th Jul 2026305 PMAQI
17th Jul 2026236 PMAQI
17th Jul 2026727 PMAQI
17th Jul 2026608 PMAQI
17th Jul 2026529 PMAQI
17th Jul 20266410 PMAQI
17th Jul 20265811 PMAQI
18th Jul 20264212 AMAQI
18th Jul 2026581 AMAQI
18th Jul 2026692 AMAQI
18th Jul 2026613 AMAQI
18th Jul 2026724 AMAQI
19°C12/28°C
18th Jul 2026665 AMAQI
18th Jul 2026586 AMAQI
18th Jul 2026667 AMAQI
18th Jul 2026668 AMAQI
18th Jul 2026629 AMAQI
18th Jul 20266510 AMAQI
18th Jul 20267511 AMAQI
18th Jul 20265812 PMAQI
18th Jul 2026581 PMAQI
18th Jul 2026582 PMAQI
18th Jul 2026643 PMAQI
18th Jul 2026624 PMAQI
18th Jul 2026625 PMAQI
18th Jul 2026606 PMAQI
18th Jul 2026587 PMAQI
18th Jul 2026508 PMAQI
18th Jul 2026529 PMAQI
18th Jul 20265110 PMAQI
18th Jul 20263811 PMAQI
19th Jul 20263612 AMAQI
19th Jul 2026341 AMAQI
19th Jul 2026232 AMAQI
19th Jul 2026563 AMAQI
19th Jul 2026504 AMAQI
20°C11/30°C
19th Jul 2026645 AMAQI
19th Jul 2026726 AMAQI
19th Jul 2026707 AMAQI
19th Jul 2026718 AMAQI
19th Jul 2026649 AMAQI
19th Jul 20265610 AMAQI
19th Jul 20262611 AMAQI
19th Jul 20264912 PMAQI
19th Jul 2026771 PMAQI
19th Jul 2026802 PMAQI
19th Jul 2026493 PMAQI
19th Jul 2026704 PMAQI
19th Jul 2026505 PMAQI
19th Jul 2026406 PMAQI
19th Jul 2026717 PMAQI
19th Jul 2026678 PMAQI
19th Jul 2026659 PMAQI
19th Jul 20265810 PMAQI
19th Jul 20264011 PMAQI
20th Jul 20267212 AMAQI
20th Jul 2026481 AMAQI
20th Jul 2026682 AMAQI
20th Jul 2026703 AMAQI
20th Jul 2026724 AMAQI
22°C13/32°C
20th Jul 2026805 AMAQI
20th Jul 2026876 AMAQI
20th Jul 2026747 AMAQI
20th Jul 2026508 AMAQI
20th Jul 2026549 AMAQI
20th Jul 20264810 AMAQI
20th Jul 20266611 AMAQI
20th Jul 20264412 PMAQI
20th Jul 2026261 PMAQI
20th Jul 2026542 PMAQI
20th Jul 2026683 PMAQI
20th Jul 2026464 PMAQI
20th Jul 2026385 PMAQI
20th Jul 2026286 PMAQI
20th Jul 2026407 PMAQI
20th Jul 2026449 PMAQI
20th Jul 20264610 PMAQI
20th Jul 20264611 PMAQI
21st Jul 20264812 AMAQI
21st Jul 2026461 AMAQI
21st Jul 2026462 AMAQI
21st Jul 2026463 AMAQI
21st Jul 2026504 AMAQI
25°C15/35°C
21st Jul 2026465 AMAQI
21st Jul 2026506 AMAQI
21st Jul 2026487 AMAQI
21st Jul 2026488 AMAQI
21st Jul 2026489 AMAQI
21st Jul 20265010 AMAQI
21st Jul 20264811 AMAQI
21st Jul 20264812 PMAQI
21st Jul 2026511 PMAQI
21st Jul 2026582 PMAQI
21st Jul 2026693 PMAQI
21st Jul 2026794 PMAQI
21st Jul 2026745 PMAQI
21st Jul 2026666 PMAQI
21st Jul 2026707 PMAQI
21st Jul 2026708 PMAQI
21st Jul 2026629 PMAQI
21st Jul 20266410 PMAQI
21st Jul 20265911 PMAQI
22nd Jul 20265412 AMAQI
22nd Jul 2026571 AMAQI
22nd Jul 2026562 AMAQI
22nd Jul 2026543 AMAQI
22nd Jul 2026544 AMAQI
29°C16/40°C
22nd Jul 2026555 AMAQI
22nd Jul 2026546 AMAQI
22nd Jul 2026547 AMAQI
22nd Jul 2026548 AMAQI
22nd Jul 2026539 AMAQI
22nd Jul 20265510 AMAQI
22nd Jul 20265611 AMAQI
22nd Jul 20266212 PMAQI
22nd Jul 2026641 PMAQI
22nd Jul 2026682 PMAQI
22nd Jul 2026663 PMAQI
22nd Jul 2026664 PMAQI
22nd Jul 2026675 PMAQI
22nd Jul 2026646 PMAQI
22nd Jul 2026627 PMAQI
22nd Jul 2026598 PMAQI
22nd Jul 2026579 PMAQI
22nd Jul 20265510 PMAQI
22nd Jul 20264811 PMAQI
23rd Jul 20264412 AMAQI
23rd Jul 2026461 AMAQI
23rd Jul 2026442 AMAQI
23rd Jul 2026403 AMAQI
23rd Jul 2026424 AMAQI
29°C21/41°C
23rd Jul 2026425 AMAQI
23rd Jul 2026466 AMAQI
23rd Jul 2026467 AMAQI
23rd Jul 2026268 AMAQI
23rd Jul 2026409 AMAQI
23rd Jul 20264010 AMAQI
23rd Jul 20264411 AMAQI
23rd Jul 20264012 PMAQI
23rd Jul 2026421 PMAQI
23rd Jul 2026422 PMAQI
23rd Jul 2026543 PMAQI
23rd Jul 2026724 PMAQI
23rd Jul 2026255 PMAQI
23rd Jul 2026256 PMAQI
23rd Jul 2026697 PMAQI
23rd Jul 2026728 PMAQI
23rd Jul 2026569 PMAQI
23rd Jul 20264610 PMAQI
23rd Jul 20265411 PMAQI
24th Jul 20264012 AMAQI
24th Jul 2026541 AMAQI
24th Jul 2026412 AMAQI
24th Jul 2026583 AMAQI
24th Jul 2026504 AMAQI
22°C15/30°C
24th Jul 2026465 AMAQI
24th Jul 2026466 AMAQI
24th Jul 2026507 AMAQI
24th Jul 2026638 AMAQI
24th Jul 2026679 AMAQI
24th Jul 20266910 AMAQI
24th Jul 20267011 AMAQI
24th Jul 20266612 PMAQI
24th Jul 2026731 PMAQI
24th Jul 2026682 PMAQI
24th Jul 2026623 PMAQI
24th Jul 2026644 PMAQI
24th Jul 2026755 PMAQI
24th Jul 2026716 PMAQI
24th Jul 2026627 PMAQI
24th Jul 2026648 PMAQI
24th Jul 2026609 PMAQI
24th Jul 20265610 PMAQI
24th Jul 20265611 PMAQI
25th Jul 20265412 AMAQI
25th Jul 2026541 AMAQI
25th Jul 2026682 AMAQI
25th Jul 2026603 AMAQI
25th Jul 2026564 AMAQI
23°C14/34°C
25th Jul 2026605 AMAQI
25th Jul 2026466 AMAQI
25th Jul 2026547 AMAQI
25th Jul 2026648 AMAQI
25th Jul 2026589 AMAQI
25th Jul 20265410 AMAQI
25th Jul 20266311 AMAQI
25th Jul 20266412 PMAQI
25th Jul 2026561 PMAQI
25th Jul 2026682 PMAQI
25th Jul 2026623 PMAQI
25th Jul 2026554 PMAQI
25th Jul 2026655 PMAQI
25th Jul 2026666 PMAQI
25th Jul 2026707 PMAQI
25th Jul 2026648 PMAQI
25th Jul 2026579 PMAQI
25th Jul 20265510 PMAQI
25th Jul 20265811 PMAQI
26th Jul 20266012 AMAQI
26th Jul 2026621 AMAQI
26th Jul 2026602 AMAQI
26th Jul 2026523 AMAQI
26th Jul 2026454 AMAQI
19°C14/24°C
26th Jul 2026665 AMAQI
26th Jul 2026686 AMAQI
26th Jul 2026717 AMAQI
26th Jul 2026648 AMAQI
26th Jul 2026669 AMAQI
26th Jul 20266910 AMAQI
26th Jul 20265811 AMAQI
26th Jul 20266312 PMAQI
26th Jul 2026441 PMAQI
26th Jul 2026582 PMAQI
26th Jul 2026573 PMAQI
26th Jul 2026514 PMAQI
26th Jul 2026555 PMAQI
26th Jul 2026546 PMAQI
26th Jul 2026467 PMAQI
26th Jul 2026468 PMAQI
26th Jul 2026669 PMAQI
26th Jul 20266010 PMAQI
26th Jul 20266411 PMAQI
27th Jul 20266812 AMAQI
27th Jul 2026551 AMAQI
27th Jul 2026222 AMAQI
27th Jul 2026463 AMAQI
27th Jul 2026424 AMAQI
21°C14/29°C
27th Jul 2026645 AMAQI
27th Jul 2026726 AMAQI
27th Jul 2026767 AMAQI
27th Jul 2026728 AMAQI
27th Jul 2026659 AMAQI
27th Jul 20267210 AMAQI
27th Jul 20267011 AMAQI
27th Jul 20266612 PMAQI
27th Jul 2026661 PMAQI
27th Jul 2026662 PMAQI
27th Jul 2026583 PMAQI
27th Jul 2026644 PMAQI
27th Jul 2026735 PMAQI
27th Jul 2026246 PMAQI
27th Jul 2026687 PMAQI
27th Jul 2026688 PMAQI
27th Jul 2026649 PMAQI
27th Jul 20266010 PMAQI
27th Jul 20266311 PMAQI
28th Jul 20266012 AMAQI
28th Jul 2026651 AMAQI
28th Jul 2026622 AMAQI
28th Jul 2026583 AMAQI
28th Jul 2026584 AMAQI
22°C14/31°C
28th Jul 2026665 AMAQI
28th Jul 2026636 AMAQI
28th Jul 2026517 AMAQI
28th Jul 2026488 AMAQI
28th Jul 2026739 AMAQI
28th Jul 20267410 AMAQI
28th Jul 20267211 AMAQI
28th Jul 20266812 PMAQI
28th Jul 2026631 PMAQI
28th Jul 2026462 PMAQI
28th Jul 2026703 PMAQI
28th Jul 2026694 PMAQI
28th Jul 2026635 PMAQI
28th Jul 2026506 PMAQI
28th Jul 2026467 PMAQI
28th Jul 2026608 PMAQI
28th Jul 2026599 PMAQI
28th Jul 20265210 PMAQI
28th Jul 20261811 PMAQI
29th Jul 20261812 AMAQI
29th Jul 2026171 AMAQI
29th Jul 2026222 AMAQI
29th Jul 2026233 AMAQI
29th Jul 2026234 AMAQI
20°C15/26°C
29th Jul 2026645 AMAQI
29th Jul 2026646 AMAQI
29th Jul 2026607 AMAQI
29th Jul 2026568 AMAQI
29th Jul 2026709 AMAQI
29th Jul 20264610 AMAQI
29th Jul 20266311 AMAQI
29th Jul 20267012 PMAQI
29th Jul 2026701 PMAQI
29th Jul 2026732 PMAQI
29th Jul 2026723 PMAQI
29th Jul 2026334 PMAQI
29th Jul 2026455 PMAQI
29th Jul 2026646 PMAQI
29th Jul 2026657 PMAQI
29th Jul 2026478 PMAQI
29th Jul 2026259 PMAQI
29th Jul 20266610 PMAQI
29th Jul 20262511 PMAQI
30th Jul 20262212 AMAQI
30th Jul 2026481 AMAQI
30th Jul 2026672 AMAQI
30th Jul 2026523 AMAQI
30th Jul 2026404 AMAQI
21°C13/30°C
30th Jul 2026545 AMAQI
30th Jul 2026676 AMAQI
30th Jul 2026647 AMAQI
30th Jul 2026628 AMAQI
30th Jul 2026669 AMAQI
30th Jul 20266610 AMAQI
30th Jul 20266911 AMAQI
30th Jul 20266612 PMAQI
30th Jul 2026731 PMAQI
30th Jul 2026642 PMAQI
30th Jul 2026683 PMAQI
30th Jul 2026664 PMAQI
30th Jul 2026615 PMAQI
30th Jul 2026686 PMAQI
30th Jul 2026687 PMAQI
30th Jul 2026668 PMAQI
30th Jul 2026629 PMAQI
30th Jul 20266010 PMAQI
30th Jul 20265411 PMAQI
31st Jul 20265412 AMAQI
31st Jul 2026491 AMAQI
31st Jul 2026522 AMAQI
31st Jul 2026273 AMAQI
31st Jul 2026254 AMAQI
21°C12/30°C
31st Jul 2026625 AMAQI
31st Jul 2026626 AMAQI
31st Jul 2026587 AMAQI
31st Jul 2026668 AMAQI
31st Jul 2026609 AMAQI
31st Jul 20263610 AMAQI
31st Jul 20265811 AMAQI
31st Jul 20267012 PMAQI
31st Jul 2026441 PMAQI
31st Jul 2026542 PMAQI
31st Jul 2026583 PMAQI
31st Jul 2026544 PMAQI
31st Jul 2026275 PMAQI
31st Jul 2026276 PMAQI
31st Jul 2026227 PMAQI
31st Jul 2026408 PMAQI
31st Jul 2026499 PMAQI
31st Jul 20265710 PMAQI
31st Jul 20264811 PMAQI
1st Aug 20265412 AMAQI
1st Aug 2026421 AMAQI
1st Aug 2026442 AMAQI
1st Aug 2026603 AMAQI
1st Aug 2026514 AMAQI
23°C13/34°C
1st Aug 2026685 AMAQI
1st Aug 2026446 AMAQI
1st Aug 2026687 AMAQI
1st Aug 2026628 AMAQI
1st Aug 2026689 AMAQI
1st Aug 20267110 AMAQI
1st Aug 20267411 AMAQI
1st Aug 20266612 PMAQI
1st Aug 2026681 PMAQI
1st Aug 2026542 PMAQI
1st Aug 2026423 PMAQI
1st Aug 2026204 PMAQI
1st Aug 2026215 PMAQI
1st Aug 2026306 PMAQI
1st Aug 2026207 PMAQI
1st Aug 2026228 PMAQI
1st Aug 2026189 PMAQI
1st Aug 20261610 PMAQI
1st Aug 20261911 PMAQI
2nd Aug 20265412 AMAQI
2nd Aug 2026561 AMAQI
2nd Aug 2026622 AMAQI
2nd Aug 2026503 AMAQI
2nd Aug 2026464 AMAQI
19°C15/26°C
2nd Aug 2026425 AMAQI
2nd Aug 2026206 AMAQI
2nd Aug 2026547 AMAQI
2nd Aug 2026668 AMAQI
2nd Aug 2026619 AMAQI
2nd Aug 20266610 AMAQI
2nd Aug 20267211 AMAQI
2nd Aug 20266212 PMAQI
2nd Aug 2026601 PMAQI
2nd Aug 2026542 PMAQI
2nd Aug 2026543 PMAQI
2nd Aug 2026544 PMAQI
2nd Aug 2026365 PMAQI
2nd Aug 2026236 PMAQI
2nd Aug 2026207 PMAQI
2nd Aug 2026468 PMAQI
2nd Aug 2026609 PMAQI
2nd Aug 20266610 PMAQI
2nd Aug 20265811 PMAQI
3rd Aug 20266312 AMAQI
3rd Aug 2026631 AMAQI
3rd Aug 2026702 AMAQI
3rd Aug 2026503 AMAQI
3rd Aug 2026584 AMAQI
18°C11/26°C
3rd Aug 2026555 AMAQI
3rd Aug 2026546 AMAQI
3rd Aug 2026547 AMAQI
3rd Aug 2026588 AMAQI
3rd Aug 2026509 AMAQI
3rd Aug 20265210 AMAQI
3rd Aug 20265811 AMAQI
3rd Aug 20266712 PMAQI
3rd Aug 2026511 PMAQI
3rd Aug 2026612 PMAQI
3rd Aug 2026623 PMAQI
3rd Aug 2026694 PMAQI
3rd Aug 2026705 PMAQI
3rd Aug 2026666 PMAQI
3rd Aug 2026677 PMAQI
3rd Aug 2026708 PMAQI
3rd Aug 2026689 PMAQI
3rd Aug 20266610 PMAQI
3rd Aug 20267011 PMAQI
4th Aug 20267012 AMAQI
4th Aug 2026731 AMAQI
4th Aug 2026772 AMAQI
4th Aug 2026713 AMAQI
4th Aug 2026644 AMAQI
21°C12/31°C
4th Aug 2026725 AMAQI
4th Aug 2026746 AMAQI
4th Aug 2026757 AMAQI
4th Aug 2026748 AMAQI
4th Aug 2026789 AMAQI
4th Aug 20267010 AMAQI
4th Aug 20267011 AMAQI
4th Aug 20267612 PMAQI
4th Aug 2026761 PMAQI
4th Aug 2026682 PMAQI
4th Aug 2026683 PMAQI
4th Aug 2026594 PMAQI
4th Aug 2026685 PMAQI
4th Aug 2026736 PMAQI
4th Aug 2026717 PMAQI
4th Aug 2026728 PMAQI
4th Aug 2026689 PMAQI
4th Aug 20267010 PMAQI
4th Aug 20267011 PMAQI
5th Aug 20266312 AMAQI
5th Aug 2026681 AMAQI
5th Aug 2026692 AMAQI
5th Aug 2026763 AMAQI
5th Aug 2026764 AMAQI
24°C13/35°C
5th Aug 2026765 AMAQI
5th Aug 2026746 AMAQI
5th Aug 2026757 AMAQI
5th Aug 2026728 AMAQI
5th Aug 2026729 AMAQI
5th Aug 20267210 AMAQI
5th Aug 20267011 AMAQI
5th Aug 20266812 PMAQI
5th Aug 2026701 PMAQI
5th Aug 2026772 PMAQI
5th Aug 2026803 PMAQI
5th Aug 2026764 PMAQI
5th Aug 2026825 PMAQI
5th Aug 2026826 PMAQI
5th Aug 2026727 PMAQI
5th Aug 2026698 PMAQI
5th Aug 2026699 PMAQI
5th Aug 20266610 PMAQI
5th Aug 20266811 PMAQI
6th Aug 20266812 AMAQI
6th Aug 2026731 AMAQI
6th Aug 2026712 AMAQI
6th Aug 2026743 AMAQI
6th Aug 2026764 AMAQI
25°C14/36°C
6th Aug 2026735 AMAQI
6th Aug 2026706 AMAQI
6th Aug 2026667 AMAQI
6th Aug 2026708 AMAQI
6th Aug 2026789 AMAQI
6th Aug 20267310 AMAQI
6th Aug 20268011 AMAQI
6th Aug 20267212 PMAQI
6th Aug 2026791 PMAQI
6th Aug 2026762 PMAQI
6th Aug 2026743 PMAQI
6th Aug 2026764 PMAQI
6th Aug 2026755 PMAQI
6th Aug 2026706 PMAQI
6th Aug 2026727 PMAQI
6th Aug 2026708 PMAQI
6th Aug 2026639 PMAQI
6th Aug 20266910 PMAQI
6th Aug 20265811 PMAQI
7th Aug 20265312 AMAQI
7th Aug 2026501 AMAQI
7th Aug 2026532 AMAQI
7th Aug 2026533 AMAQI
7th Aug 2026514 AMAQI
26°C15/37°C
7th Aug 2026515 AMAQI
7th Aug 2026516 AMAQI
7th Aug 2026537 AMAQI
7th Aug 2026548 AMAQI
7th Aug 2026549 AMAQI
7th Aug 20265110 AMAQI
7th Aug 20265311 AMAQI
7th Aug 20265412 PMAQI
7th Aug 2026511 PMAQI
7th Aug 2026542 PMAQI
7th Aug 2026583 PMAQI
7th Aug 2026554 PMAQI
7th Aug 2026525 PMAQI
7th Aug 2026526 PMAQI
7th Aug 2026507 PMAQI
7th Aug 2026508 PMAQI
7th Aug 2026499 PMAQI
7th Aug 20265410 PMAQI
7th Aug 20265711 PMAQI
8th Aug 20265812 AMAQI
8th Aug 2026581 AMAQI
8th Aug 2026522 AMAQI
8th Aug 2026463 AMAQI
8th Aug 2026484 AMAQI
24°C15/35°C
8th Aug 2026535 AMAQI
8th Aug 2026556 AMAQI
8th Aug 2026527 AMAQI
8th Aug 2026498 AMAQI
8th Aug 2026429 AMAQI
8th Aug 20264410 AMAQI
8th Aug 20264411 AMAQI
8th Aug 20264612 PMAQI
8th Aug 2026461 PMAQI
8th Aug 2026522 PMAQI
8th Aug 2026543 PMAQI
8th Aug 2026404 PMAQI
8th Aug 2026505 PMAQI
8th Aug 2026466 PMAQI
8th Aug 2026487 PMAQI
8th Aug 2026468 PMAQI
8th Aug 2026469 PMAQI
8th Aug 20264610 PMAQI
8th Aug 20264611 PMAQI
9th Aug 20262212 AMAQI
9th Aug 2026221 AMAQI
9th Aug 2026222 AMAQI
9th Aug 2026213 AMAQI
9th Aug 2026504 AMAQI
24°C15/35°C
9th Aug 2026725 AMAQI
5 AM9th Aug 2026716 AMAQI
9th Aug 2026727 AMAQI
9th Aug 2026798 AMAQI
9th Aug 2026769 AMAQI
9th Aug 20267610 AMAQI
9th Aug 20268211 AMAQI
9th Aug 20267312 PMAQI
12 PM9th Aug 2026891 PMAQI
9th Aug 20261092 PMAQI
9th Aug 20261163 PMAQI
9th Aug 2026624 PMAQI
9th Aug 2026235 PMAQI
9th Aug 2026726 PMAQI
9th Aug 20261197 PMAQI
9th Aug 20261158 PMAQI
8 PM9th Aug 2026579 PMAQI
9th Aug 20266010 PMAQI
9th Aug 20266511 PMAQI
12 AM
4 AM
22°C14/32°C
Day time
Avg. Highest Time
3 PM
58AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
5 PM - 6 PM
49AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 3 PM (Avg. 58), while the lowest AQI was between 5 PM to 6 PM (Avg. 49).
Night time
Avg. Highest Time
2 AM - 10 PM
49AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
12 AM
45AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 10 PM (Avg. 49), while the lowest AQI was between 12 AM to 12 AM (Avg. 45).
2026 Days Vs Air Quality
Hillsboro, Oregon, United States
2026
87%
188
13%
29
Total number of days with different AQI categories in last 221 days in 2026 (144 days remaining)
Good
188 DaysModerate
29 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2026, 87% of 221 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
Hillsboro, 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
56AQI (US)
56AQI (US)
2nd January 2026
32AQI (US)
32AQI (US)
3rd January 2026
27AQI (US)
27AQI (US)
4th January 2026
16AQI (US)
16AQI (US)
5th January 2026
19AQI (US)
19AQI (US)
6th January 2026
29AQI (US)
29AQI (US)
7th January 2026
18AQI (US)
18AQI (US)
8th January 2026
28AQI (US)
28AQI (US)
9th January 2026
25AQI (US)
25AQI (US)
10th January 2026
46AQI (US)
46AQI (US)
11th January 2026
55AQI (US)
55AQI (US)
12th January 2026
46AQI (US)
46AQI (US)
13th January 2026
51AQI (US)
51AQI (US)
14th January 2026
33AQI (US)
33AQI (US)
15th January 2026
27AQI (US)
27AQI (US)
16th January 2026
31AQI (US)
31AQI (US)
17th January 2026
23AQI (US)
23AQI (US)
18th January 2026
34AQI (US)
34AQI (US)
19th January 2026
34AQI (US)
34AQI (US)
20th January 2026
42AQI (US)
42AQI (US)
21st January 2026
38AQI (US)
38AQI (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
53AQI (US)
53AQI (US)
30th January 2026
49AQI (US)
49AQI (US)
31st January 2026
45AQI (US)
45AQI (US)
1st February 2026
49AQI (US)
49AQI (US)
2nd February 2026
49AQI (US)
49AQI (US)
3rd February 2026
50AQI (US)
50AQI (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
46AQI (US)
46AQI (US)
9th February 2026
46AQI (US)
46AQI (US)
10th February 2026
48AQI (US)
48AQI (US)
11th February 2026
45AQI (US)
45AQI (US)
12th February 2026
45AQI (US)
45AQI (US)
13th February 2026
53AQI (US)
53AQI (US)
14th February 2026
50AQI (US)
50AQI (US)
15th February 2026
42AQI (US)
42AQI (US)
16th February 2026
45AQI (US)
45AQI (US)
17th February 2026
46AQI (US)
46AQI (US)
18th February 2026
43AQI (US)
43AQI (US)
19th February 2026
42AQI (US)
42AQI (US)
20th February 2026
41AQI (US)
41AQI (US)
21st February 2026
35AQI (US)
35AQI (US)
22nd February 2026
37AQI (US)
37AQI (US)
23rd February 2026
40AQI (US)
40AQI (US)
24th February 2026
46AQI (US)
46AQI (US)
25th February 2026
42AQI (US)
42AQI (US)
26th February 2026
36AQI (US)
36AQI (US)
27th February 2026
35AQI (US)
35AQI (US)
28th February 2026
39AQI (US)
39AQI (US)
1st March 2026
43AQI (US)
43AQI (US)
2nd March 2026
53AQI (US)
53AQI (US)
3rd March 2026
47AQI (US)
47AQI (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
37AQI (US)
37AQI (US)
11th March 2026
44AQI (US)
44AQI (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
37AQI (US)
37AQI (US)
16th March 2026
38AQI (US)
38AQI (US)
17th March 2026
34AQI (US)
34AQI (US)
18th March 2026
33AQI (US)
33AQI (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
37AQI (US)
37AQI (US)
23rd March 2026
39AQI (US)
39AQI (US)
24th March 2026
37AQI (US)
37AQI (US)
25th March 2026
33AQI (US)
33AQI (US)
26th March 2026
31AQI (US)
31AQI (US)
27th March 2026
30AQI (US)
30AQI (US)
28th March 2026
33AQI (US)
33AQI (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
26AQI (US)
26AQI (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
31AQI (US)
31AQI (US)
11th April 2026
32AQI (US)
32AQI (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
34AQI (US)
34AQI (US)
16th April 2026
29AQI (US)
29AQI (US)
17th April 2026
18th April 2026
33AQI (US)
33AQI (US)
19th April 2026
33AQI (US)
33AQI (US)
20th April 2026
28AQI (US)
28AQI (US)
21st April 2026
27AQI (US)
27AQI (US)
22nd April 2026
23rd April 2026
24AQI (US)
24AQI (US)
24th April 2026
29AQI (US)
29AQI (US)
25th April 2026
31AQI (US)
31AQI (US)
26th April 2026
33AQI (US)
33AQI (US)
27th April 2026
28AQI (US)
28AQI (US)
28th April 2026
24AQI (US)
24AQI (US)
29th April 2026
23AQI (US)
23AQI (US)
30th April 2026
26AQI (US)
26AQI (US)
1st May 2026
26AQI (US)
26AQI (US)
2nd May 2026
23AQI (US)
23AQI (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
32AQI (US)
32AQI (US)
12th May 2026
28AQI (US)
28AQI (US)
13th May 2026
28AQI (US)
28AQI (US)
14th May 2026
25AQI (US)
25AQI (US)
15th May 2026
48AQI (US)
48AQI (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
56AQI (US)
56AQI (US)
20th May 2026
49AQI (US)
49AQI (US)
21st May 2026
41AQI (US)
41AQI (US)
22nd May 2026
50AQI (US)
50AQI (US)
23rd May 2026
49AQI (US)
49AQI (US)
24th May 2026
47AQI (US)
47AQI (US)
25th May 2026
43AQI (US)
43AQI (US)
26th May 2026
28AQI (US)
28AQI (US)
27th May 2026
28AQI (US)
28AQI (US)
28th May 2026
28AQI (US)
28AQI (US)
29th May 2026
26AQI (US)
26AQI (US)
30th May 2026
28AQI (US)
28AQI (US)
31st May 2026
30AQI (US)
30AQI (US)
1st June 2026
31AQI (US)
31AQI (US)
2nd June 2026
31AQI (US)
31AQI (US)
3rd June 2026
30AQI (US)
30AQI (US)
4th June 2026
26AQI (US)
26AQI (US)
5th June 2026
28AQI (US)
28AQI (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
28AQI (US)
28AQI (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
25AQI (US)
25AQI (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
28AQI (US)
28AQI (US)
27th June 2026
29AQI (US)
29AQI (US)
28th June 2026
28AQI (US)
28AQI (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
26AQI (US)
26AQI (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
31AQI (US)
31AQI (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
55AQI (US)
55AQI (US)
18th July 2026
60AQI (US)
60AQI (US)
19th July 2026
56AQI (US)
56AQI (US)
20th July 2026
55AQI (US)
55AQI (US)
21st July 2026
56AQI (US)
56AQI (US)
22nd July 2026
58AQI (US)
58AQI (US)
23rd July 2026
46AQI (US)
46AQI (US)
24th July 2026
60AQI (US)
60AQI (US)
25th July 2026
60AQI (US)
60AQI (US)
26th July 2026
58AQI (US)
58AQI (US)
27th July 2026
61AQI (US)
61AQI (US)
28th July 2026
59AQI (US)
59AQI (US)
29th July 2026
49AQI (US)
49AQI (US)
30th July 2026
60AQI (US)
60AQI (US)
31st July 2026
48AQI (US)
48AQI (US)
1st August 2026
46AQI (US)
46AQI (US)
2nd August 2026
52AQI (US)
52AQI (US)
3rd August 2026
62AQI (US)
62AQI (US)
4th August 2026
71AQI (US)
71AQI (US)
5th August 2026
72AQI (US)
72AQI (US)
6th August 2026
72AQI (US)
72AQI (US)
7th August 2026
53AQI (US)
53AQI (US)
8th August 2026
49AQI (US)
49AQI (US)
9th August 2026
10th August 2026
11th August 2026
12th August 2026
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
38AQI (US)
44AQI (US)
37AQI (US)
30AQI (US)
36AQI (US)
26AQI (US)
42AQI (US)
60AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202637AQI (US)
26
5
27
1
30
1
28
26
4
30
19
12
2
6
188
29
Highest AQI (US) recorded in
August60AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202527AQI (US)
26
5
28
31
30
31
30
31
30
1
29
1
23
8
21
9
27
4
337
28
Highest AQI (US) recorded in
November44AQI (US)
Lowest AQI (US) recorded in
May15AQI (US)
202421AQI (US)
29
1
27
31
30
31
29
31
31
27
3
31
27
3
29
2
353
9
Highest AQI (US) recorded in
December32AQI (US)
Lowest AQI (US) recorded in
June13AQI (US)
202325AQI (US)
29
1
21
7
31
30
31
30
31
24
6
1
30
29
2
20
8
29
2
335
26
1
Highest AQI (US) recorded in
November41AQI (US)
Lowest AQI (US) recorded in
April15AQI (US)
202229AQI (US)
25
4
20
2
30
1
25
31
30
23
1
26
2
1
18
11
2
19
11
25
6
273
37
3
Highest AQI (US) recorded in
October54AQI (US)
Lowest AQI (US) recorded in
June14AQI (US)
202123AQI (US)
24
5
28
28
3
30
31
30
31
30
1
30
29
2
26
4
31
348
15
Highest AQI (US) recorded in
January33AQI (US)
Lowest AQI (US) recorded in
May14AQI (US)
202032AQI (US)
13
20
18
30
31
31
19
3
1
6
1
26
5
24
6
25
6
237
20
1
6
1
Highest AQI (US) recorded in
September87AQI (US)
Lowest AQI (US) recorded in
June13AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2026(Avg.)
37AQI (US)Least Polluted Year Recorded
2024(Avg.)
21AQI (US)Hillsboro's annual 2026 AQI (US) (37) shows an average percentage change of 44.2% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (23), 2022 (29), 2023 (25), 2024 (21), 2025 (27).
