Mercer Island, Washington, 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
Mercer Island, Washington, United States
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
20th Aug 2023
99AQILowest AQI recorded on
16th Aug 2025
13AQISame Day Analysis (15th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 52 of Moderate air quality on the same day.
Day & Night AQI Trend: 15th Aug - 16th Aug 2026
Mercer Island, Washington, United States
AQI
Day
Night
.
5 AM15th Aug 2026
8 PM
4 AM16th Aug 2026
Day time
Avg. Highest Time
2PM15th Aug
118AQI
Avg. Lowest Time
5PM15th Aug
21AQI
Night time
Avg. Highest Time
3AM16th Aug
64AQI
Avg. Lowest Time
1AM16th Aug
23AQI
In the last 24 hours,
Mercer Island's AQI reached its highest point of 118 at 2 PM during the Day, while the lowest point, 21, was recorded at 5 PM during the Day between 15th Aug and 16th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Mercer Island, Washington, United States
JulAug
18th - 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 - 14th14th - 15th15th - 16th16th
Day
Night
18th Jul 2026475 AMAQI
18th Jul 2026466 AMAQI
18th Jul 2026257 AMAQI
18th Jul 2026148 AMAQI
18th Jul 2026109 AMAQI
18th Jul 20264610 AMAQI
18th Jul 20262411 AMAQI
18th Jul 20263412 PMAQI
18th Jul 2026671 PMAQI
18th Jul 20261022 PMAQI
18th Jul 2026643 PMAQI
18th Jul 2026444 PMAQI
18th Jul 2026525 PMAQI
18th Jul 2026586 PMAQI
18th Jul 2026427 PMAQI
18th Jul 2026248 PMAQI
18th Jul 2026209 PMAQI
18th Jul 20264010 PMAQI
18th Jul 20262411 PMAQI
19th Jul 20262312 AMAQI
19th Jul 2026181 AMAQI
19th Jul 2026292 AMAQI
19th Jul 2026573 AMAQI
19th Jul 2026574 AMAQI
18°C13/24°C
19th Jul 2026555 AMAQI
19th Jul 2026486 AMAQI
19th Jul 2026427 AMAQI
19th Jul 2026468 AMAQI
19th Jul 2026509 AMAQI
19th Jul 20263810 AMAQI
19th Jul 20263811 AMAQI
19th Jul 20262812 PMAQI
19th Jul 2026421 PMAQI
19th Jul 2026402 PMAQI
19th Jul 2026443 PMAQI
19th Jul 2026314 PMAQI
19th Jul 2026425 PMAQI
19th Jul 2026426 PMAQI
19th Jul 2026197 PMAQI
19th Jul 2026258 PMAQI
19th Jul 2026209 PMAQI
19th Jul 20261510 PMAQI
19th Jul 20263811 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026401 AMAQI
20th Jul 2026342 AMAQI
20th Jul 2026273 AMAQI
20th Jul 2026384 AMAQI
20°C13/28°C
20th Jul 2026505 AMAQI
20th Jul 2026436 AMAQI
20th Jul 2026507 AMAQI
20th Jul 2026408 AMAQI
20th Jul 2026509 AMAQI
20th Jul 20263210 AMAQI
20th Jul 20264211 AMAQI
20th Jul 20264612 PMAQI
20th Jul 2026421 PMAQI
20th Jul 2026402 PMAQI
20th Jul 2026443 PMAQI
20th Jul 2026404 PMAQI
20th Jul 2026405 PMAQI
20th Jul 2026426 PMAQI
20th Jul 2026447 PMAQI
20th Jul 2026469 PMAQI
20th Jul 20264410 PMAQI
20th Jul 20264811 PMAQI
21st Jul 20264412 AMAQI
21st Jul 2026481 AMAQI
21st Jul 2026442 AMAQI
21st Jul 2026463 AMAQI
21st Jul 2026464 AMAQI
21°C14/29°C
21st Jul 2026445 AMAQI
21st Jul 2026506 AMAQI
21st Jul 2026467 AMAQI
21st Jul 2026488 AMAQI
21st Jul 2026509 AMAQI
21st Jul 20265110 AMAQI
21st Jul 20265011 AMAQI
21st Jul 20265112 PMAQI
21st Jul 2026501 PMAQI
21st Jul 2026502 PMAQI
21st Jul 2026503 PMAQI
21st Jul 2026514 PMAQI
21st Jul 2026555 PMAQI
21st Jul 2026516 PMAQI
21st Jul 2026537 PMAQI
21st Jul 2026508 PMAQI
21st Jul 2026469 PMAQI
21st Jul 20265010 PMAQI
21st Jul 20264811 PMAQI
22nd Jul 20264812 AMAQI
22nd Jul 2026511 AMAQI
22nd Jul 2026512 AMAQI
22nd Jul 2026523 AMAQI
22nd Jul 2026484 AMAQI
26°C17/37°C
22nd Jul 2026485 AMAQI
22nd Jul 2026516 AMAQI
22nd Jul 2026507 AMAQI
22nd Jul 2026488 AMAQI
22nd Jul 2026539 AMAQI
22nd Jul 20265410 AMAQI
22nd Jul 20265711 AMAQI
22nd Jul 20265512 PMAQI
22nd Jul 2026561 PMAQI
22nd Jul 2026562 PMAQI
22nd Jul 2026583 PMAQI
22nd Jul 2026584 PMAQI
22nd Jul 2026645 PMAQI
22nd Jul 2026656 PMAQI
22nd Jul 2026657 PMAQI
22nd Jul 2026698 PMAQI
22nd Jul 2026669 PMAQI
22nd Jul 20267310 PMAQI
22nd Jul 20267211 PMAQI
23rd Jul 20266212 AMAQI
23rd Jul 2026531 AMAQI
23rd Jul 2026462 AMAQI
23rd Jul 2026463 AMAQI
23rd Jul 2026524 AMAQI
25°C17/35°C
23rd Jul 2026405 AMAQI
23rd Jul 2026546 AMAQI
23rd Jul 2026737 AMAQI
23rd Jul 2026568 AMAQI
23rd Jul 2026509 AMAQI
23rd Jul 20264610 AMAQI
23rd Jul 20265111 AMAQI
23rd Jul 20265012 PMAQI
23rd Jul 2026321 PMAQI
23rd Jul 2026552 PMAQI
23rd Jul 2026523 PMAQI
23rd Jul 2026424 PMAQI
23rd Jul 2026385 PMAQI
23rd Jul 2026346 PMAQI
23rd Jul 2026257 PMAQI
23rd Jul 2026238 PMAQI
23rd Jul 2026469 PMAQI
23rd Jul 20264010 PMAQI
23rd Jul 20266911 PMAQI
24th Jul 20263212 AMAQI
24th Jul 2026401 AMAQI
24th Jul 2026362 AMAQI
24th Jul 2026503 AMAQI
24th Jul 2026604 AMAQI
20°C16/26°C
24th Jul 2026545 AMAQI
24th Jul 2026526 AMAQI
24th Jul 2026607 AMAQI
24th Jul 2026518 AMAQI
24th Jul 2026559 AMAQI
24th Jul 20264810 AMAQI
24th Jul 20265011 AMAQI
24th Jul 20264212 PMAQI
24th Jul 2026461 PMAQI
24th Jul 2026462 PMAQI
24th Jul 2026233 PMAQI
24th Jul 2026634 PMAQI
24th Jul 2026505 PMAQI
24th Jul 2026536 PMAQI
24th Jul 2026537 PMAQI
24th Jul 2026428 PMAQI
24th Jul 2026429 PMAQI
24th Jul 20264410 PMAQI
24th Jul 20264411 PMAQI
25th Jul 20264412 AMAQI
25th Jul 2026461 AMAQI
25th Jul 2026402 AMAQI
25th Jul 2026463 AMAQI
25th Jul 2026594 AMAQI
20°C15/28°C
25th Jul 2026625 AMAQI
25th Jul 2026626 AMAQI
25th Jul 2026597 AMAQI
25th Jul 2026598 AMAQI
25th Jul 2026589 AMAQI
25th Jul 20266510 AMAQI
25th Jul 20266611 AMAQI
25th Jul 20264212 PMAQI
25th Jul 2026441 PMAQI
25th Jul 2026632 PMAQI
25th Jul 2026563 PMAQI
25th Jul 2026364 PMAQI
25th Jul 2026445 PMAQI
25th Jul 2026486 PMAQI
25th Jul 2026347 PMAQI
25th Jul 2026368 PMAQI
25th Jul 2026469 PMAQI
25th Jul 20265610 PMAQI
25th Jul 20263811 PMAQI
26th Jul 20264912 AMAQI
26th Jul 2026581 AMAQI
26th Jul 2026402 AMAQI
26th Jul 2026383 AMAQI
26th Jul 2026294 AMAQI
18°C14/24°C
26th Jul 2026645 AMAQI
26th Jul 2026626 AMAQI
26th Jul 2026667 AMAQI
26th Jul 2026648 AMAQI
26th Jul 2026659 AMAQI
26th Jul 20267010 AMAQI
26th Jul 20265811 AMAQI
26th Jul 20265512 PMAQI
26th Jul 2026441 PMAQI
26th Jul 2026592 PMAQI
26th Jul 2026583 PMAQI
26th Jul 2026364 PMAQI
26th Jul 2026465 PMAQI
26th Jul 2026256 PMAQI
26th Jul 2026627 PMAQI
26th Jul 2026428 PMAQI
26th Jul 2026429 PMAQI
26th Jul 20265010 PMAQI
26th Jul 20266011 PMAQI
27th Jul 20264512 AMAQI
27th Jul 2026301 AMAQI
27th Jul 2026682 AMAQI
27th Jul 2026403 AMAQI
27th Jul 2026304 AMAQI
18°C15/23°C
27th Jul 2026235 AMAQI
27th Jul 2026676 AMAQI
27th Jul 2026657 AMAQI
27th Jul 2026508 AMAQI
27th Jul 2026409 AMAQI
27th Jul 20265610 AMAQI
27th Jul 20266011 AMAQI
27th Jul 20267312 PMAQI
27th Jul 2026661 PMAQI
27th Jul 2026572 PMAQI
27th Jul 2026483 PMAQI
27th Jul 2026514 PMAQI
27th Jul 2026305 PMAQI
27th Jul 2026256 PMAQI
27th Jul 2026237 PMAQI
27th Jul 2026218 PMAQI
27th Jul 2026409 PMAQI
27th Jul 20262110 PMAQI
27th Jul 20266511 PMAQI
28th Jul 20265612 AMAQI
28th Jul 2026441 AMAQI
28th Jul 2026522 AMAQI
28th Jul 2026383 AMAQI
28th Jul 2026644 AMAQI
20°C14/28°C
28th Jul 2026405 AMAQI
28th Jul 2026366 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026458 AMAQI
28th Jul 2026749 AMAQI
28th Jul 20267210 AMAQI
28th Jul 20268911 AMAQI
28th Jul 20268512 PMAQI
28th Jul 2026811 PMAQI
28th Jul 2026482 PMAQI
28th Jul 2026803 PMAQI
28th Jul 2026474 PMAQI
28th Jul 2026215 PMAQI
28th Jul 2026326 PMAQI
28th Jul 2026347 PMAQI
28th Jul 2026458 PMAQI
28th Jul 2026389 PMAQI
28th Jul 20261010 PMAQI
28th Jul 20261011 PMAQI
29th Jul 20264612 AMAQI
29th Jul 2026281 AMAQI
29th Jul 2026142 AMAQI
29th Jul 2026423 AMAQI
29th Jul 2026424 AMAQI
19°C15/24°C
29th Jul 2026385 AMAQI
29th Jul 2026276 AMAQI
29th Jul 2026257 AMAQI
29th Jul 2026348 AMAQI
29th Jul 2026409 AMAQI
29th Jul 20263410 AMAQI
29th Jul 20263811 AMAQI
29th Jul 20265612 PMAQI
29th Jul 2026481 PMAQI
29th Jul 2026362 PMAQI
29th Jul 2026633 PMAQI
29th Jul 2026404 PMAQI
29th Jul 2026215 PMAQI
29th Jul 2026596 PMAQI
29th Jul 2026367 PMAQI
29th Jul 2026448 PMAQI
29th Jul 2026279 PMAQI
29th Jul 20264410 PMAQI
29th Jul 20262711 PMAQI
30th Jul 20262312 AMAQI
30th Jul 2026341 AMAQI
30th Jul 2026402 AMAQI
30th Jul 2026363 AMAQI
30th Jul 2026484 AMAQI
18°C13/26°C
30th Jul 2026385 AMAQI
30th Jul 2026406 AMAQI
30th Jul 2026567 AMAQI
30th Jul 2026408 AMAQI
30th Jul 2026509 AMAQI
30th Jul 20264210 AMAQI
30th Jul 20264611 AMAQI
30th Jul 20264812 PMAQI
30th Jul 2026531 PMAQI
30th Jul 2026462 PMAQI
30th Jul 2026443 PMAQI
30th Jul 2026514 PMAQI
30th Jul 2026525 PMAQI
30th Jul 2026386 PMAQI
30th Jul 2026407 PMAQI
30th Jul 2026308 PMAQI
30th Jul 2026409 PMAQI
30th Jul 20263210 PMAQI
30th Jul 20264811 PMAQI
31st Jul 20265212 AMAQI
31st Jul 2026501 AMAQI
31st Jul 2026462 AMAQI
31st Jul 2026403 AMAQI
31st Jul 2026424 AMAQI
18°C12/26°C
31st Jul 2026525 AMAQI
31st Jul 2026566 AMAQI
31st Jul 2026527 AMAQI
31st Jul 2026588 AMAQI
31st Jul 2026559 AMAQI
31st Jul 20264310 AMAQI
31st Jul 20265811 AMAQI
31st Jul 20264812 PMAQI
31st Jul 2026421 PMAQI
31st Jul 2026642 PMAQI
31st Jul 2026653 PMAQI
31st Jul 2026404 PMAQI
31st Jul 2026255 PMAQI
31st Jul 2026276 PMAQI
31st Jul 2026237 PMAQI
31st Jul 2026428 PMAQI
31st Jul 2026369 PMAQI
31st Jul 20265710 PMAQI
31st Jul 20265311 PMAQI
1st Aug 20265112 AMAQI
1st Aug 2026341 AMAQI
1st Aug 2026342 AMAQI
1st Aug 2026423 AMAQI
1st Aug 2026474 AMAQI
20°C13/28°C
1st Aug 2026685 AMAQI
1st Aug 2026296 AMAQI
1st Aug 2026707 AMAQI
1st Aug 2026648 AMAQI
1st Aug 2026699 AMAQI
1st Aug 20264210 AMAQI
1st Aug 20264811 AMAQI
1st Aug 20266012 PMAQI
1st Aug 2026691 PMAQI
1st Aug 2026582 PMAQI
1st Aug 2026903 PMAQI
1st Aug 2026324 PMAQI
1st Aug 2026325 PMAQI
1st Aug 2026426 PMAQI
1st Aug 2026207 PMAQI
1st Aug 2026198 PMAQI
1st Aug 2026239 PMAQI
1st Aug 20261910 PMAQI
1st Aug 20261211 PMAQI
2nd Aug 20263812 AMAQI
2nd Aug 2026331 AMAQI
2nd Aug 2026212 AMAQI
2nd Aug 2026503 AMAQI
2nd Aug 2026464 AMAQI
18°C15/24°C
2nd Aug 2026385 AMAQI
2nd Aug 2026386 AMAQI
2nd Aug 2026407 AMAQI
2nd Aug 2026608 AMAQI
2nd Aug 2026629 AMAQI
2nd Aug 20264610 AMAQI
2nd Aug 20264211 AMAQI
2nd Aug 20263812 PMAQI
2nd Aug 2026401 PMAQI
2nd Aug 2026382 PMAQI
2nd Aug 2026333 PMAQI
2nd Aug 2026674 PMAQI
2nd Aug 2026345 PMAQI
2nd Aug 2026296 PMAQI
2nd Aug 2026447 PMAQI
2nd Aug 2026368 PMAQI
2nd Aug 2026469 PMAQI
2nd Aug 20264610 PMAQI
2nd Aug 20263311 PMAQI
3rd Aug 20265712 AMAQI
3rd Aug 2026221 AMAQI
3rd Aug 2026712 AMAQI
3rd Aug 2026523 AMAQI
3rd Aug 2026584 AMAQI
16°C12/21°C
3rd Aug 2026485 AMAQI
3rd Aug 2026386 AMAQI
3rd Aug 2026567 AMAQI
3rd Aug 2026528 AMAQI
3rd Aug 2026569 AMAQI
3rd Aug 20265610 AMAQI
3rd Aug 20266711 AMAQI
3rd Aug 20266612 PMAQI
3rd Aug 2026871 PMAQI
3rd Aug 20261092 PMAQI
3rd Aug 2026333 PMAQI
3rd Aug 2026294 PMAQI
3rd Aug 2026455 PMAQI
3rd Aug 2026446 PMAQI
3rd Aug 2026487 PMAQI
3rd Aug 2026548 PMAQI
3rd Aug 2026549 PMAQI
3rd Aug 20264810 PMAQI
3rd Aug 20264211 PMAQI
4th Aug 20264012 AMAQI
4th Aug 2026461 AMAQI
4th Aug 2026462 AMAQI
4th Aug 2026463 AMAQI
4th Aug 2026514 AMAQI
17°C11/26°C
4th Aug 2026445 AMAQI
4th Aug 2026516 AMAQI
4th Aug 2026627 AMAQI
4th Aug 2026648 AMAQI
4th Aug 2026689 AMAQI
4th Aug 20266610 AMAQI
4th Aug 20267011 AMAQI
4th Aug 20266212 PMAQI
4th Aug 2026571 PMAQI
4th Aug 2026592 PMAQI
4th Aug 2026703 PMAQI
4th Aug 2026814 PMAQI
4th Aug 2026805 PMAQI
4th Aug 2026886 PMAQI
4th Aug 2026877 PMAQI
4th Aug 2026878 PMAQI
4th Aug 2026909 PMAQI
4th Aug 202610210 PMAQI
4th Aug 202610211 PMAQI
5th Aug 20269412 AMAQI
5th Aug 2026881 AMAQI
5th Aug 2026792 AMAQI
5th Aug 2026743 AMAQI
5th Aug 2026714 AMAQI
19°C13/27°C
5th Aug 2026625 AMAQI
5th Aug 2026626 AMAQI
5th Aug 2026627 AMAQI
5th Aug 2026638 AMAQI
5th Aug 2026649 AMAQI
5th Aug 20267310 AMAQI
5th Aug 20268511 AMAQI
5th Aug 20269512 PMAQI
5th Aug 2026851 PMAQI
5th Aug 2026762 PMAQI
5th Aug 2026833 PMAQI
5th Aug 2026794 PMAQI
5th Aug 2026845 PMAQI
5th Aug 2026846 PMAQI
5th Aug 2026977 PMAQI
5th Aug 20261008 PMAQI
5th Aug 2026979 PMAQI
5th Aug 202610810 PMAQI
5th Aug 202611011 PMAQI
6th Aug 202611412 AMAQI
6th Aug 20261081 AMAQI
6th Aug 20261092 AMAQI
6th Aug 20261063 AMAQI
6th Aug 20261054 AMAQI
21°C13/30°C
6th Aug 2026995 AMAQI
6th Aug 20261026 AMAQI
6th Aug 2026987 AMAQI
6th Aug 2026978 AMAQI
6th Aug 2026929 AMAQI
6th Aug 20269710 AMAQI
6th Aug 20269711 AMAQI
6th Aug 20269412 PMAQI
6th Aug 2026991 PMAQI
6th Aug 2026922 PMAQI
6th Aug 2026943 PMAQI
6th Aug 2026924 PMAQI
6th Aug 2026965 PMAQI
6th Aug 2026886 PMAQI
6th Aug 2026907 PMAQI
6th Aug 2026938 PMAQI
6th Aug 2026949 PMAQI
6th Aug 20268310 PMAQI
6th Aug 20267111 PMAQI
7th Aug 20266212 AMAQI
7th Aug 2026651 AMAQI
7th Aug 2026582 AMAQI
7th Aug 2026563 AMAQI
7th Aug 2026584 AMAQI
21°C14/30°C
7th Aug 2026585 AMAQI
7th Aug 2026596 AMAQI
7th Aug 2026587 AMAQI
7th Aug 2026608 AMAQI
7th Aug 2026589 AMAQI
7th Aug 20266010 AMAQI
7th Aug 20265611 AMAQI
7th Aug 20265712 PMAQI
7th Aug 2026581 PMAQI
7th Aug 2026642 PMAQI
7th Aug 2026593 PMAQI
7th Aug 2026654 PMAQI
7th Aug 2026695 PMAQI
7th Aug 2026666 PMAQI
7th Aug 2026667 PMAQI
7th Aug 2026708 PMAQI
7th Aug 2026709 PMAQI
7th Aug 20267010 PMAQI
7th Aug 20266011 PMAQI
8th Aug 20265912 AMAQI
8th Aug 2026561 AMAQI
8th Aug 2026552 AMAQI
8th Aug 2026533 AMAQI
8th Aug 2026514 AMAQI
21°C15/29°C
8th Aug 2026495 AMAQI
8th Aug 2026486 AMAQI
8th Aug 2026447 AMAQI
8th Aug 2026468 AMAQI
8th Aug 2026519 AMAQI
8th Aug 20264610 AMAQI
8th Aug 20264011 AMAQI
8th Aug 20264212 PMAQI
8th Aug 2026531 PMAQI
8th Aug 2026402 PMAQI
8th Aug 2026463 PMAQI
8th Aug 2026484 PMAQI
8th Aug 2026515 PMAQI
8th Aug 2026506 PMAQI
8th Aug 2026447 PMAQI
8th Aug 2026428 PMAQI
8th Aug 2026449 PMAQI
8th Aug 20264810 PMAQI
8th Aug 20264611 PMAQI
9th Aug 20264012 AMAQI
9th Aug 2026381 AMAQI
9th Aug 2026702 AMAQI
9th Aug 2026403 AMAQI
9th Aug 2026384 AMAQI
20°C15/28°C
9th Aug 2026465 AMAQI
9th Aug 2026446 AMAQI
9th Aug 2026447 AMAQI
9th Aug 2026428 AMAQI
9th Aug 2026409 AMAQI
9th Aug 20264610 AMAQI
9th Aug 20264911 AMAQI
9th Aug 20264612 PMAQI
9th Aug 2026881 PMAQI
9th Aug 20261022 PMAQI
9th Aug 2026403 PMAQI
9th Aug 2026344 PMAQI
9th Aug 2026295 PMAQI
9th Aug 2026326 PMAQI
9th Aug 20261087 PMAQI
9th Aug 2026448 PMAQI
9th Aug 2026409 PMAQI
9th Aug 20265410 PMAQI
9th Aug 20266511 PMAQI
10th Aug 20265112 AMAQI
10th Aug 2026441 AMAQI
10th Aug 2026702 AMAQI
10th Aug 2026423 AMAQI
10th Aug 2026404 AMAQI
19°C13/25°C
10th Aug 2026805 AMAQI
10th Aug 2026386 AMAQI
10th Aug 2026707 AMAQI
10th Aug 2026628 AMAQI
10th Aug 2026509 AMAQI
10th Aug 20264610 AMAQI
10th Aug 20265111 AMAQI
10th Aug 20265112 PMAQI
10th Aug 2026421 PMAQI
10th Aug 2026422 PMAQI
10th Aug 2026423 PMAQI
10th Aug 2026524 PMAQI
10th Aug 2026255 PMAQI
10th Aug 2026296 PMAQI
10th Aug 2026447 PMAQI
10th Aug 2026428 PMAQI
10th Aug 2026429 PMAQI
10th Aug 20262510 PMAQI
10th Aug 20264811 PMAQI
11th Aug 20263412 AMAQI
11th Aug 2026441 AMAQI
11th Aug 2026402 AMAQI
11th Aug 2026363 AMAQI
11th Aug 2026684 AMAQI
17°C13/24°C
11th Aug 2026765 AMAQI
11th Aug 2026736 AMAQI
11th Aug 2026787 AMAQI
11th Aug 2026548 AMAQI
11th Aug 2026539 AMAQI
11th Aug 20262110 AMAQI
11th Aug 20265911 AMAQI
11th Aug 20266512 PMAQI
11th Aug 2026581 PMAQI
11th Aug 2026542 PMAQI
11th Aug 2026563 PMAQI
11th Aug 2026304 PMAQI
11th Aug 2026385 PMAQI
11th Aug 2026366 PMAQI
11th Aug 2026347 PMAQI
11th Aug 2026348 PMAQI
11th Aug 2026259 PMAQI
11th Aug 20262310 PMAQI
11th Aug 20263011 PMAQI
12th Aug 20264212 AMAQI
12th Aug 2026301 AMAQI
12th Aug 2026792 AMAQI
12th Aug 2026633 AMAQI
12th Aug 2026644 AMAQI
19°C13/26°C
12th Aug 2026695 AMAQI
12th Aug 2026716 AMAQI
12th Aug 2026737 AMAQI
12th Aug 2026428 AMAQI
12th Aug 2026539 AMAQI
12th Aug 20265510 AMAQI
12th Aug 20265011 AMAQI
12th Aug 20265412 PMAQI
12th Aug 2026521 PMAQI
12th Aug 2026502 PMAQI
12th Aug 2026443 PMAQI
12th Aug 2026444 PMAQI
12th Aug 2026345 PMAQI
12th Aug 2026486 PMAQI
12th Aug 2026487 PMAQI
12th Aug 2026388 PMAQI
12th Aug 2026589 PMAQI
12th Aug 20264710 PMAQI
12th Aug 20266511 PMAQI
13th Aug 20267012 AMAQI
13th Aug 2026741 AMAQI
13th Aug 2026662 AMAQI
13th Aug 2026513 AMAQI
13th Aug 2026514 AMAQI
19°C14/26°C
13th Aug 2026575 AMAQI
13th Aug 2026556 AMAQI
13th Aug 2026577 AMAQI
13th Aug 2026508 AMAQI
13th Aug 2026549 AMAQI
13th Aug 20264410 AMAQI
13th Aug 20264211 AMAQI
13th Aug 20264612 PMAQI
13th Aug 2026421 PMAQI
13th Aug 2026542 PMAQI
13th Aug 2026423 PMAQI
13th Aug 2026464 PMAQI
13th Aug 2026425 PMAQI
13th Aug 2026426 PMAQI
13th Aug 2026447 PMAQI
13th Aug 2026488 PMAQI
13th Aug 2026469 PMAQI
13th Aug 20265310 PMAQI
13th Aug 20265611 PMAQI
14th Aug 20265512 AMAQI
14th Aug 2026551 AMAQI
14th Aug 2026532 AMAQI
14th Aug 2026553 AMAQI
14th Aug 2026554 AMAQI
19°C14/27°C
14th Aug 2026485 AMAQI
14th Aug 2026486 AMAQI
14th Aug 2026467 AMAQI
14th Aug 2026428 AMAQI
14th Aug 2026429 AMAQI
14th Aug 20263310 AMAQI
14th Aug 20264211 AMAQI
14th Aug 20263812 PMAQI
14th Aug 2026421 PMAQI
14th Aug 2026522 PMAQI
14th Aug 2026603 PMAQI
14th Aug 2026234 PMAQI
14th Aug 2026465 PMAQI
14th Aug 2026446 PMAQI
14th Aug 2026487 PMAQI
14th Aug 2026508 PMAQI
14th Aug 2026489 PMAQI
14th Aug 20264610 PMAQI
14th Aug 20265211 PMAQI
15th Aug 20265212 AMAQI
15th Aug 2026481 AMAQI
15th Aug 2026272 AMAQI
15th Aug 2026403 AMAQI
15th Aug 2026464 AMAQI
19°C14/27°C
15th Aug 2026585 AMAQI
15th Aug 2026626 AMAQI
15th Aug 2026607 AMAQI
15th Aug 2026408 AMAQI
15th Aug 2026809 AMAQI
15th Aug 20263810 AMAQI
15th Aug 20263611 AMAQI
15th Aug 20266912 PMAQI
15th Aug 2026841 PMAQI
15th Aug 20261182 PMAQI
15th Aug 2026503 PMAQI
15th Aug 2026504 PMAQI
15th Aug 2026215 PMAQI
15th Aug 2026426 PMAQI
15th Aug 2026527 PMAQI
15th Aug 2026528 PMAQI
15th Aug 2026509 PMAQI
15th Aug 20264210 PMAQI
15th Aug 20263611 PMAQI
16th Aug 20263812 AMAQI
16th Aug 2026231 AMAQI
16th Aug 2026362 AMAQI
16th Aug 2026643 AMAQI
16th Aug 2026344 AMAQI
20°C15/29°C
16th Aug 2026745 AMAQI
5 AM16th Aug 2026856 AMAQI
16th Aug 2026767 AMAQI
16th Aug 2026698 AMAQI
16th Aug 2026709 AMAQI
16th Aug 20264210 AMAQI
16th Aug 20263211 AMAQI
16th Aug 20262312 PMAQI
12 PM16th Aug 2026301 PMAQI
16th Aug 2026692 PMAQI
16th Aug 2026673 PMAQI
16th Aug 2026664 PMAQI
16th Aug 2026785 PMAQI
16th Aug 2026866 PMAQI
16th Aug 2026657 PMAQI
8 PM
12 AM
4 AM
19°C13/28°C
Day time
Avg. Highest Time
2 PM
61AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
5 PM
46AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 2 PM (Avg. 61), while the lowest AQI was between 5 PM to 5 PM (Avg. 46).
Night time
Avg. Highest Time
4 AM
51AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
1 AM
46AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 4 AM (Avg. 51), while the lowest AQI was between 1 AM to 1 AM (Avg. 46).
2026 Days Vs Air Quality
Mercer Island, Washington, United States
2026
94%
211
6%
13
Total number of days with different AQI categories in last 228 days in 2026 (137 days remaining)
Good
211 DaysModerate
13 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 228 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Mercer Island, Washington, 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
41AQI (US)
41AQI (US)
2nd January 2026
29AQI (US)
29AQI (US)
3rd January 2026
22AQI (US)
22AQI (US)
4th January 2026
14AQI (US)
14AQI (US)
5th January 2026
23AQI (US)
23AQI (US)
6th January 2026
18AQI (US)
18AQI (US)
7th January 2026
19AQI (US)
19AQI (US)
8th January 2026
16AQI (US)
16AQI (US)
9th January 2026
15AQI (US)
15AQI (US)
10th January 2026
27AQI (US)
27AQI (US)
11th January 2026
29AQI (US)
29AQI (US)
12th January 2026
19AQI (US)
19AQI (US)
13th January 2026
20AQI (US)
20AQI (US)
14th January 2026
21AQI (US)
21AQI (US)
15th January 2026
16AQI (US)
16AQI (US)
16th January 2026
22AQI (US)
22AQI (US)
17th January 2026
27AQI (US)
27AQI (US)
18th January 2026
41AQI (US)
41AQI (US)
19th January 2026
47AQI (US)
47AQI (US)
20th January 2026
48AQI (US)
48AQI (US)
21st January 2026
44AQI (US)
44AQI (US)
22nd January 2026
27AQI (US)
27AQI (US)
23rd January 2026
31AQI (US)
31AQI (US)
24th January 2026
25AQI (US)
25AQI (US)
25th January 2026
24AQI (US)
24AQI (US)
26th January 2026
30AQI (US)
30AQI (US)
27th January 2026
25AQI (US)
25AQI (US)
28th January 2026
25AQI (US)
25AQI (US)
29th January 2026
45AQI (US)
45AQI (US)
30th January 2026
44AQI (US)
44AQI (US)
31st January 2026
35AQI (US)
35AQI (US)
1st February 2026
42AQI (US)
42AQI (US)
2nd February 2026
42AQI (US)
42AQI (US)
3rd February 2026
33AQI (US)
33AQI (US)
4th February 2026
23AQI (US)
23AQI (US)
5th February 2026
30AQI (US)
30AQI (US)
6th February 2026
27AQI (US)
27AQI (US)
7th February 2026
27AQI (US)
27AQI (US)
8th February 2026
26AQI (US)
26AQI (US)
9th February 2026
39AQI (US)
39AQI (US)
10th February 2026
34AQI (US)
34AQI (US)
11th February 2026
27AQI (US)
27AQI (US)
12th February 2026
20AQI (US)
20AQI (US)
13th February 2026
34AQI (US)
34AQI (US)
14th February 2026
45AQI (US)
45AQI (US)
15th February 2026
30AQI (US)
30AQI (US)
16th February 2026
28AQI (US)
28AQI (US)
17th February 2026
34AQI (US)
34AQI (US)
18th February 2026
37AQI (US)
37AQI (US)
19th February 2026
32AQI (US)
32AQI (US)
20th February 2026
20AQI (US)
20AQI (US)
21st February 2026
31AQI (US)
31AQI (US)
22nd February 2026
34AQI (US)
34AQI (US)
23rd February 2026
28AQI (US)
28AQI (US)
24th February 2026
30AQI (US)
30AQI (US)
25th February 2026
24AQI (US)
24AQI (US)
26th February 2026
42AQI (US)
42AQI (US)
27th February 2026
20AQI (US)
20AQI (US)
28th February 2026
22AQI (US)
22AQI (US)
1st March 2026
29AQI (US)
29AQI (US)
2nd March 2026
43AQI (US)
43AQI (US)
3rd March 2026
24AQI (US)
24AQI (US)
4th March 2026
45AQI (US)
45AQI (US)
5th March 2026
35AQI (US)
35AQI (US)
6th March 2026
34AQI (US)
34AQI (US)
7th March 2026
42AQI (US)
42AQI (US)
8th March 2026
35AQI (US)
35AQI (US)
9th March 2026
28AQI (US)
28AQI (US)
10th March 2026
30AQI (US)
30AQI (US)
11th March 2026
37AQI (US)
37AQI (US)
12th March 2026
27AQI (US)
27AQI (US)
13th March 2026
39AQI (US)
39AQI (US)
14th March 2026
28AQI (US)
28AQI (US)
15th March 2026
31AQI (US)
31AQI (US)
16th March 2026
30AQI (US)
30AQI (US)
17th March 2026
31AQI (US)
31AQI (US)
18th March 2026
27AQI (US)
27AQI (US)
19th March 2026
33AQI (US)
33AQI (US)
20th March 2026
28AQI (US)
28AQI (US)
21st March 2026
32AQI (US)
32AQI (US)
22nd March 2026
34AQI (US)
34AQI (US)
23rd March 2026
27AQI (US)
27AQI (US)
24th March 2026
29AQI (US)
29AQI (US)
25th March 2026
29AQI (US)
29AQI (US)
26th March 2026
19AQI (US)
19AQI (US)
27th March 2026
21AQI (US)
21AQI (US)
28th March 2026
18AQI (US)
18AQI (US)
29th March 2026
21AQI (US)
21AQI (US)
30th March 2026
18AQI (US)
18AQI (US)
31st March 2026
18AQI (US)
18AQI (US)
1st April 2026
28AQI (US)
28AQI (US)
2nd April 2026
25AQI (US)
25AQI (US)
3rd April 2026
17AQI (US)
17AQI (US)
4th April 2026
23AQI (US)
23AQI (US)
5th April 2026
24AQI (US)
24AQI (US)
6th April 2026
22AQI (US)
22AQI (US)
7th April 2026
18AQI (US)
18AQI (US)
8th April 2026
20AQI (US)
20AQI (US)
9th April 2026
18AQI (US)
18AQI (US)
10th April 2026
25AQI (US)
25AQI (US)
11th April 2026
26AQI (US)
26AQI (US)
12th April 2026
26AQI (US)
26AQI (US)
13th April 2026
22AQI (US)
22AQI (US)
14th April 2026
33AQI (US)
33AQI (US)
15th April 2026
27AQI (US)
27AQI (US)
16th April 2026
27AQI (US)
27AQI (US)
17th April 2026
18th April 2026
18AQI (US)
18AQI (US)
19th April 2026
17AQI (US)
17AQI (US)
20th April 2026
15AQI (US)
15AQI (US)
21st April 2026
16AQI (US)
16AQI (US)
22nd April 2026
23rd April 2026
20AQI (US)
20AQI (US)
24th April 2026
17AQI (US)
17AQI (US)
25th April 2026
20AQI (US)
20AQI (US)
26th April 2026
24AQI (US)
24AQI (US)
27th April 2026
17AQI (US)
17AQI (US)
28th April 2026
19AQI (US)
19AQI (US)
29th April 2026
16AQI (US)
16AQI (US)
30th April 2026
20AQI (US)
20AQI (US)
1st May 2026
18AQI (US)
18AQI (US)
2nd May 2026
17AQI (US)
17AQI (US)
3rd May 2026
20AQI (US)
20AQI (US)
4th May 2026
25AQI (US)
25AQI (US)
5th May 2026
23AQI (US)
23AQI (US)
6th May 2026
20AQI (US)
20AQI (US)
7th May 2026
15AQI (US)
15AQI (US)
8th May 2026
20AQI (US)
20AQI (US)
9th May 2026
10th May 2026
21AQI (US)
21AQI (US)
11th May 2026
20AQI (US)
20AQI (US)
12th May 2026
19AQI (US)
19AQI (US)
13th May 2026
23AQI (US)
23AQI (US)
14th May 2026
21AQI (US)
21AQI (US)
15th May 2026
39AQI (US)
39AQI (US)
16th May 2026
51AQI (US)
51AQI (US)
17th May 2026
56AQI (US)
56AQI (US)
18th May 2026
48AQI (US)
48AQI (US)
19th May 2026
44AQI (US)
44AQI (US)
20th May 2026
44AQI (US)
44AQI (US)
21st May 2026
34AQI (US)
34AQI (US)
22nd May 2026
37AQI (US)
37AQI (US)
23rd May 2026
49AQI (US)
49AQI (US)
24th May 2026
39AQI (US)
39AQI (US)
25th May 2026
40AQI (US)
40AQI (US)
26th May 2026
25AQI (US)
25AQI (US)
27th May 2026
18AQI (US)
18AQI (US)
28th May 2026
14AQI (US)
14AQI (US)
29th May 2026
14AQI (US)
14AQI (US)
30th May 2026
23AQI (US)
23AQI (US)
31st May 2026
19AQI (US)
19AQI (US)
1st June 2026
19AQI (US)
19AQI (US)
2nd June 2026
12AQI (US)
12AQI (US)
3rd June 2026
12AQI (US)
12AQI (US)
4th June 2026
14AQI (US)
14AQI (US)
5th June 2026
16AQI (US)
16AQI (US)
6th June 2026
24AQI (US)
24AQI (US)
7th June 2026
24AQI (US)
24AQI (US)
8th June 2026
21AQI (US)
21AQI (US)
9th June 2026
24AQI (US)
24AQI (US)
10th June 2026
24AQI (US)
24AQI (US)
11th June 2026
22AQI (US)
22AQI (US)
12th June 2026
24AQI (US)
24AQI (US)
13th June 2026
17AQI (US)
17AQI (US)
14th June 2026
15AQI (US)
15AQI (US)
15th June 2026
17AQI (US)
17AQI (US)
16th June 2026
16AQI (US)
16AQI (US)
17th June 2026
16AQI (US)
16AQI (US)
18th June 2026
16AQI (US)
16AQI (US)
19th June 2026
12AQI (US)
12AQI (US)
20th June 2026
16AQI (US)
16AQI (US)
21st June 2026
14AQI (US)
14AQI (US)
22nd June 2026
14AQI (US)
14AQI (US)
23rd June 2026
16AQI (US)
16AQI (US)
24th June 2026
18AQI (US)
18AQI (US)
25th June 2026
17AQI (US)
17AQI (US)
26th June 2026
23AQI (US)
23AQI (US)
27th June 2026
30AQI (US)
30AQI (US)
28th June 2026
26AQI (US)
26AQI (US)
29th June 2026
21AQI (US)
21AQI (US)
30th June 2026
15AQI (US)
15AQI (US)
1st July 2026
13AQI (US)
13AQI (US)
2nd July 2026
18AQI (US)
18AQI (US)
3rd July 2026
29AQI (US)
29AQI (US)
4th July 2026
27AQI (US)
27AQI (US)
5th July 2026
22AQI (US)
22AQI (US)
6th July 2026
17AQI (US)
17AQI (US)
7th July 2026
16AQI (US)
16AQI (US)
8th July 2026
22AQI (US)
22AQI (US)
9th July 2026
21AQI (US)
21AQI (US)
10th July 2026
18AQI (US)
18AQI (US)
11th July 2026
23AQI (US)
23AQI (US)
12th July 2026
25AQI (US)
25AQI (US)
13th July 2026
23AQI (US)
23AQI (US)
14th July 2026
18AQI (US)
18AQI (US)
15th July 2026
16AQI (US)
16AQI (US)
16th July 2026
14AQI (US)
14AQI (US)
17th July 2026
39AQI (US)
39AQI (US)
18th July 2026
40AQI (US)
40AQI (US)
19th July 2026
37AQI (US)
37AQI (US)
20th July 2026
41AQI (US)
41AQI (US)
21st July 2026
49AQI (US)
49AQI (US)
22nd July 2026
57AQI (US)
57AQI (US)
23rd July 2026
47AQI (US)
47AQI (US)
24th July 2026
47AQI (US)
47AQI (US)
25th July 2026
50AQI (US)
50AQI (US)
26th July 2026
52AQI (US)
52AQI (US)
27th July 2026
46AQI (US)
46AQI (US)
28th July 2026
49AQI (US)
49AQI (US)
29th July 2026
38AQI (US)
38AQI (US)
30th July 2026
42AQI (US)
42AQI (US)
31st July 2026
47AQI (US)
47AQI (US)
1st August 2026
45AQI (US)
45AQI (US)
2nd August 2026
42AQI (US)
42AQI (US)
3rd August 2026
54AQI (US)
54AQI (US)
4th August 2026
67AQI (US)
67AQI (US)
5th August 2026
82AQI (US)
82AQI (US)
6th August 2026
96AQI (US)
96AQI (US)
7th August 2026
62AQI (US)
62AQI (US)
8th August 2026
48AQI (US)
48AQI (US)
9th August 2026
51AQI (US)
51AQI (US)
10th August 2026
47AQI (US)
47AQI (US)
11th August 2026
47AQI (US)
47AQI (US)
12th August 2026
53AQI (US)
53AQI (US)
13th August 2026
51AQI (US)
51AQI (US)
14th August 2026
47AQI (US)
47AQI (US)
15th August 2026
52AQI (US)
52AQI (US)
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
28AQI (US)
31AQI (US)
30AQI (US)
21AQI (US)
29AQI (US)
19AQI (US)
32AQI (US)
56AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202629AQI (US)
31
28
31
28
28
2
30
29
2
6
9
211
13
Highest AQI (US) recorded in
August56AQI (US)
Lowest AQI (US) recorded in
June19AQI (US)
202529AQI (US)
28
3
28
31
30
31
30
30
1
27
4
27
3
28
3
29
1
30
1
349
16
Highest AQI (US) recorded in
January37AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202428AQI (US)
29
1
29
29
2
30
31
30
29
2
31
27
3
31
27
3
30
1
353
12
Highest AQI (US) recorded in
March32AQI (US)
Lowest AQI (US) recorded in
January24AQI (US)
202330AQI (US)
31
28
31
30
31
30
29
1
1
25
6
29
1
31
24
5
31
350
13
1
Highest AQI (US) recorded in
August41AQI (US)
Lowest AQI (US) recorded in
December23AQI (US)
202232AQI (US)
31
22
31
30
31
30
22
1
1
22
6
1
15
12
2
2
27
3
31
293
22
3
2
Highest AQI (US) recorded in
October63AQI (US)
Lowest AQI (US) recorded in
July24AQI (US)
202126AQI (US)
28
1
28
31
30
31
27
2
31
29
1
1
30
31
30
31
357
4
1
Highest AQI (US) recorded in
April32AQI (US)
Lowest AQI (US) recorded in
December23AQI (US)
202029AQI (US)
20
18
30
31
31
19
2
2
4
3
30
30
29
2
238
4
2
4
3
Highest AQI (US) recorded in
September72AQI (US)
Lowest AQI (US) recorded in
June19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2022(Avg.)
32AQI (US)Least Polluted Year Recorded
2021(Avg.)
26AQI (US)Mercer Island's annual 2026 AQI (US) (29) shows an average percentage change of 0.4% (worsened AQI (US)) compared to previous years: 2020 (29), 2021 (26), 2022 (32), 2023 (30), 2024 (28), 2025 (29).
