Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Chehalis, 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+

July Air Quality Analysis

Chehalis, Washington, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
5th Jul 2023
100AQI
Lowest AQI recorded on
1st Jul 2024
8AQI

Same Day Analysis (29th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 38 of Good air quality on the same day.

Day & Night AQI Trend: 29th Jul - 30th Jul 2026

Chehalis, Washington, United States

AQI
Day
Night
.

5 AM29th Jul 2026

9 PM

4 AM30th Jul 2026

Day time
Avg. Highest Time
9AM29th Jul

52AQI

Avg. Lowest Time
7AM29th Jul

20AQI

Night time
Avg. Highest Time
2AM30th Jul

59AQI

Avg. Lowest Time
9PM29th Jul

25AQI

In the last 24 hours,

Chehalis's AQI reached its highest point of 59 at 2 AM during the Night, while the lowest point, 20, was recorded at 7 AM during the Day between 29th Jul and 30th Jul 2026.

Day & Night AQI Trend : Jul 2026

Chehalis, Washington, United States

Jul
01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th
Day
Night
1st Jul 2026285 AMAQI
1st Jul 2026266 AMAQI
1st Jul 2026287 AMAQI
1st Jul 2026288 AMAQI
1st Jul 2026319 AMAQI
1st Jul 20262810 AMAQI
1st Jul 20262911 AMAQI
1st Jul 20263012 PMAQI
1st Jul 2026271 PMAQI
1st Jul 2026272 PMAQI
1st Jul 2026263 PMAQI
1st Jul 2026264 PMAQI
1st Jul 2026265 PMAQI
1st Jul 2026266 PMAQI
1st Jul 2026247 PMAQI
1st Jul 2026248 PMAQI
1st Jul 2026249 PMAQI
1st Jul 20262610 PMAQI
1st Jul 20262711 PMAQI
2nd Jul 20262612 AMAQI
2nd Jul 2026281 AMAQI
2nd Jul 2026282 AMAQI
2nd Jul 2026283 AMAQI
2nd Jul 2026284 AMAQI

14°C11/19°C

2nd Jul 2026285 AMAQI
2nd Jul 2026266 AMAQI
2nd Jul 2026277 AMAQI
2nd Jul 2026298 AMAQI
2nd Jul 2026249 AMAQI
2nd Jul 20262410 AMAQI
2nd Jul 20262611 AMAQI
2nd Jul 20262612 PMAQI
2nd Jul 2026261 PMAQI
2nd Jul 2026252 PMAQI
2nd Jul 2026283 PMAQI
2nd Jul 2026284 PMAQI
2nd Jul 2026285 PMAQI
2nd Jul 2026286 PMAQI
2nd Jul 2026257 PMAQI
2nd Jul 2026278 PMAQI
2nd Jul 2026279 PMAQI
2nd Jul 20263010 PMAQI
2nd Jul 20262811 PMAQI
3rd Jul 20262812 AMAQI
3rd Jul 2026301 AMAQI
3rd Jul 2026282 AMAQI
3rd Jul 2026293 AMAQI
3rd Jul 2026284 AMAQI

16°C10/22°C

3rd Jul 2026285 AMAQI
3rd Jul 2026296 AMAQI
3rd Jul 2026287 AMAQI
3rd Jul 2026288 AMAQI
3rd Jul 2026279 AMAQI
3rd Jul 20262810 AMAQI
3rd Jul 20262711 AMAQI
3rd Jul 20262912 PMAQI
3rd Jul 2026301 PMAQI
3rd Jul 2026282 PMAQI
3rd Jul 2026283 PMAQI
3rd Jul 2026284 PMAQI
3rd Jul 2026275 PMAQI
3rd Jul 2026286 PMAQI
3rd Jul 2026287 PMAQI
3rd Jul 2026288 PMAQI
3rd Jul 2026289 PMAQI
3rd Jul 20262910 PMAQI
3rd Jul 20263011 PMAQI
4th Jul 20263012 AMAQI
4th Jul 2026281 AMAQI
4th Jul 2026282 AMAQI
4th Jul 2026273 AMAQI
4th Jul 2026284 AMAQI

18°C15/22°C

4th Jul 2026285 AMAQI
4th Jul 2026286 AMAQI
4th Jul 2026257 AMAQI
4th Jul 2026268 AMAQI
4th Jul 2026289 AMAQI
4th Jul 20262510 AMAQI
4th Jul 20262611 AMAQI
4th Jul 20262612 PMAQI
4th Jul 2026271 PMAQI
4th Jul 2026272 PMAQI
4th Jul 2026243 PMAQI
4th Jul 2026264 PMAQI
4th Jul 2026235 PMAQI
4th Jul 2026246 PMAQI
4th Jul 2026247 PMAQI
4th Jul 2026248 PMAQI
4th Jul 2026229 PMAQI
4th Jul 20262610 PMAQI
4th Jul 20262811 PMAQI
5th Jul 20262512 AMAQI
5th Jul 2026261 AMAQI
5th Jul 2026252 AMAQI
5th Jul 2026263 AMAQI
5th Jul 2026254 AMAQI

17°C12/24°C

5th Jul 2026255 AMAQI
5th Jul 2026246 AMAQI
5th Jul 2026267 AMAQI
5th Jul 2026248 AMAQI
5th Jul 2026249 AMAQI
5th Jul 20262310 AMAQI
5th Jul 20262411 AMAQI
5th Jul 20262412 PMAQI
5th Jul 2026281 PMAQI
5th Jul 2026262 PMAQI
5th Jul 2026283 PMAQI
5th Jul 2026264 PMAQI
5th Jul 2026245 PMAQI
5th Jul 2026246 PMAQI
5th Jul 2026257 PMAQI
5th Jul 2026228 PMAQI
5th Jul 2026249 PMAQI
5th Jul 20262510 PMAQI
5th Jul 20262711 PMAQI
6th Jul 20262712 AMAQI
6th Jul 2026261 AMAQI
6th Jul 2026222 AMAQI
6th Jul 2026263 AMAQI
6th Jul 2026284 AMAQI

19°C11/28°C

6th Jul 2026275 AMAQI
6th Jul 2026286 AMAQI
6th Jul 2026257 AMAQI
6th Jul 2026268 AMAQI
6th Jul 2026279 AMAQI
6th Jul 20262610 AMAQI
6th Jul 20262411 AMAQI
6th Jul 20262612 PMAQI
6th Jul 2026281 PMAQI
6th Jul 2026302 PMAQI
6th Jul 2026243 PMAQI
6th Jul 2026264 PMAQI
6th Jul 2026245 PMAQI
6th Jul 2026286 PMAQI
6th Jul 2026267 PMAQI
6th Jul 2026278 PMAQI
6th Jul 2026279 PMAQI
6th Jul 20262810 PMAQI
6th Jul 20263111 PMAQI
7th Jul 20263012 AMAQI
7th Jul 2026301 AMAQI
7th Jul 2026302 AMAQI
7th Jul 2026313 AMAQI
7th Jul 2026304 AMAQI

21°C11/31°C

7th Jul 2026295 AMAQI
7th Jul 2026286 AMAQI
7th Jul 2026287 AMAQI
7th Jul 2026298 AMAQI
7th Jul 2026289 AMAQI
7th Jul 20262910 AMAQI
7th Jul 20262811 AMAQI
7th Jul 20262812 PMAQI
7th Jul 2026321 PMAQI
7th Jul 2026302 PMAQI
7th Jul 2026313 PMAQI
7th Jul 2026324 PMAQI
7th Jul 2026285 PMAQI
7th Jul 2026286 PMAQI
7th Jul 2026297 PMAQI
7th Jul 2026278 PMAQI
7th Jul 2026279 PMAQI
7th Jul 20262810 PMAQI
7th Jul 20263011 PMAQI
8th Jul 20263212 AMAQI
8th Jul 2026281 AMAQI
8th Jul 2026282 AMAQI
8th Jul 2026273 AMAQI
8th Jul 2026264 AMAQI

17°C10/26°C

8th Jul 2026285 AMAQI
8th Jul 2026296 AMAQI
8th Jul 2026267 AMAQI
8th Jul 2026308 AMAQI
8th Jul 2026309 AMAQI
8th Jul 20262810 AMAQI
8th Jul 20262811 AMAQI
8th Jul 20262812 PMAQI
8th Jul 2026281 PMAQI
8th Jul 2026302 PMAQI
8th Jul 2026283 PMAQI
8th Jul 2026284 PMAQI
8th Jul 2026235 PMAQI
8th Jul 2026246 PMAQI
8th Jul 2026247 PMAQI
8th Jul 2026248 PMAQI
8th Jul 2026249 PMAQI
8th Jul 20262810 PMAQI
8th Jul 20263111 PMAQI
9th Jul 20263012 AMAQI
9th Jul 2026281 AMAQI
9th Jul 2026292 AMAQI
9th Jul 2026283 AMAQI
9th Jul 2026294 AMAQI

18°C12/26°C

9th Jul 2026285 AMAQI
9th Jul 2026286 AMAQI
9th Jul 2026277 AMAQI
9th Jul 2026288 AMAQI
9th Jul 2026299 AMAQI
9th Jul 20262610 AMAQI
9th Jul 20262611 AMAQI
9th Jul 20262712 PMAQI
9th Jul 2026291 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026293 PMAQI
9th Jul 2026304 PMAQI
9th Jul 2026295 PMAQI
9th Jul 2026306 PMAQI
9th Jul 2026287 PMAQI
9th Jul 2026288 PMAQI
9th Jul 2026299 PMAQI
9th Jul 20262810 PMAQI
9th Jul 20262911 PMAQI
10th Jul 20262712 AMAQI
10th Jul 2026301 AMAQI
10th Jul 2026302 AMAQI
10th Jul 2026333 AMAQI
10th Jul 2026324 AMAQI

18°C9/28°C

10th Jul 2026335 AMAQI
10th Jul 2026346 AMAQI
10th Jul 2026327 AMAQI
10th Jul 2026348 AMAQI
10th Jul 2026349 AMAQI
10th Jul 20262810 AMAQI
10th Jul 20263211 AMAQI
10th Jul 20262812 PMAQI
10th Jul 2026301 PMAQI
10th Jul 2026302 PMAQI
10th Jul 2026303 PMAQI
10th Jul 2026344 PMAQI
10th Jul 2026365 PMAQI
10th Jul 2026366 PMAQI
10th Jul 2026327 PMAQI
10th Jul 2026328 PMAQI
10th Jul 2026309 PMAQI
10th Jul 20263210 PMAQI
10th Jul 20263011 PMAQI
11th Jul 20263012 AMAQI
11th Jul 2026351 AMAQI
11th Jul 2026322 AMAQI
11th Jul 2026323 AMAQI
11th Jul 2026324 AMAQI

18°C13/25°C

11th Jul 2026335 AMAQI
11th Jul 2026346 AMAQI
11th Jul 2026367 AMAQI
11th Jul 2026368 AMAQI
11th Jul 2026329 AMAQI
11th Jul 20263010 AMAQI
11th Jul 20263011 AMAQI
11th Jul 20262912 PMAQI
11th Jul 2026281 PMAQI
11th Jul 2026302 PMAQI
11th Jul 2026333 PMAQI
11th Jul 2026324 PMAQI
11th Jul 2026325 PMAQI
11th Jul 2026316 PMAQI
11th Jul 2026327 PMAQI
11th Jul 2026308 PMAQI
11th Jul 2026299 PMAQI
11th Jul 20263010 PMAQI
11th Jul 20262911 PMAQI
12th Jul 20263012 AMAQI
12th Jul 2026331 AMAQI
12th Jul 2026302 AMAQI
12th Jul 2026313 AMAQI
12th Jul 2026304 AMAQI

16°C12/23°C

12th Jul 2026315 AMAQI
12th Jul 2026316 AMAQI
12th Jul 2026327 AMAQI
12th Jul 2026328 AMAQI
12th Jul 2026309 AMAQI
12th Jul 20262910 AMAQI
12th Jul 20262611 AMAQI
12th Jul 20262512 PMAQI
12th Jul 2026281 PMAQI
12th Jul 2026292 PMAQI
12th Jul 2026313 PMAQI
12th Jul 2026324 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026306 PMAQI
12th Jul 2026287 PMAQI
12th Jul 2026288 PMAQI
12th Jul 2026289 PMAQI
12th Jul 20262810 PMAQI
12th Jul 20262811 PMAQI
13th Jul 20262812 AMAQI
13th Jul 2026301 AMAQI
13th Jul 2026302 AMAQI
13th Jul 2026333 AMAQI
13th Jul 2026314 AMAQI

18°C11/26°C

13th Jul 2026325 AMAQI
13th Jul 2026336 AMAQI
13th Jul 2026347 AMAQI
13th Jul 2026338 AMAQI
13th Jul 2026309 AMAQI
13th Jul 20263110 AMAQI
13th Jul 20262811 AMAQI
13th Jul 20262512 PMAQI
13th Jul 2026281 PMAQI
13th Jul 2026302 PMAQI
13th Jul 2026323 PMAQI
13th Jul 2026324 PMAQI
13th Jul 2026325 PMAQI
13th Jul 2026336 PMAQI
13th Jul 2026327 PMAQI
13th Jul 2026308 PMAQI
13th Jul 2026289 PMAQI
13th Jul 20263010 PMAQI
13th Jul 20262711 PMAQI
14th Jul 20263112 AMAQI
14th Jul 2026301 AMAQI
14th Jul 2026292 AMAQI
14th Jul 2026323 AMAQI
14th Jul 2026324 AMAQI

20°C9/29°C

14th Jul 2026325 AMAQI
14th Jul 2026316 AMAQI
14th Jul 2026357 AMAQI
14th Jul 2026348 AMAQI
14th Jul 2026339 AMAQI
14th Jul 20263010 AMAQI
14th Jul 20262611 AMAQI
14th Jul 20262612 PMAQI
14th Jul 2026261 PMAQI
14th Jul 2026272 PMAQI
14th Jul 2026323 PMAQI
14th Jul 2026304 PMAQI
14th Jul 2026305 PMAQI
14th Jul 2026326 PMAQI
14th Jul 2026307 PMAQI
14th Jul 2026288 PMAQI
14th Jul 2026299 PMAQI
14th Jul 20262910 PMAQI
14th Jul 20262911 PMAQI
15th Jul 20262812 AMAQI
15th Jul 2026291 AMAQI
15th Jul 2026282 AMAQI
15th Jul 2026273 AMAQI
15th Jul 2026284 AMAQI

21°C10/31°C

15th Jul 2026305 AMAQI
15th Jul 2026306 AMAQI
15th Jul 2026287 AMAQI
15th Jul 2026298 AMAQI
15th Jul 2026279 AMAQI
15th Jul 20262810 AMAQI
15th Jul 20262611 AMAQI
15th Jul 20262612 PMAQI
15th Jul 2026241 PMAQI
15th Jul 2026262 PMAQI
15th Jul 2026293 PMAQI
15th Jul 2026304 PMAQI
15th Jul 2026265 PMAQI
15th Jul 2026306 PMAQI
15th Jul 2026287 PMAQI
15th Jul 2026298 PMAQI
15th Jul 2026279 PMAQI
15th Jul 20262610 PMAQI
15th Jul 20262611 PMAQI
16th Jul 20262812 AMAQI
16th Jul 2026281 AMAQI
16th Jul 2026292 AMAQI
16th Jul 2026293 AMAQI
16th Jul 2026314 AMAQI

21°C12/30°C

16th Jul 2026315 AMAQI
16th Jul 2026306 AMAQI
16th Jul 2026317 AMAQI
16th Jul 2026328 AMAQI
16th Jul 2026329 AMAQI
16th Jul 20263010 AMAQI
16th Jul 20262811 AMAQI
16th Jul 20262912 PMAQI
16th Jul 2026301 PMAQI
16th Jul 2026282 PMAQI
16th Jul 2026283 PMAQI
16th Jul 2026284 PMAQI
16th Jul 2026295 PMAQI
16th Jul 2026306 PMAQI
16th Jul 2026307 PMAQI
16th Jul 2026278 PMAQI
16th Jul 2026289 PMAQI
16th Jul 20263010 PMAQI
16th Jul 20262811 PMAQI
17th Jul 20263012 AMAQI
17th Jul 2026261 AMAQI
17th Jul 2026372 AMAQI
17th Jul 2026443 AMAQI
17th Jul 2026444 AMAQI

17°C14/23°C

17th Jul 2026435 AMAQI
17th Jul 2026386 AMAQI
17th Jul 2026397 AMAQI
17th Jul 2026448 AMAQI
17th Jul 2026549 AMAQI
17th Jul 20264110 AMAQI
17th Jul 20264811 AMAQI
17th Jul 20263612 PMAQI
17th Jul 2026411 PMAQI
17th Jul 2026542 PMAQI
17th Jul 2026463 PMAQI
17th Jul 2026454 PMAQI
17th Jul 2026555 PMAQI
17th Jul 2026426 PMAQI
17th Jul 2026507 PMAQI
17th Jul 2026518 PMAQI
17th Jul 2026359 PMAQI
17th Jul 20263810 PMAQI
17th Jul 20265111 PMAQI
18th Jul 20264212 AMAQI
18th Jul 2026461 AMAQI
18th Jul 2026342 AMAQI
18th Jul 2026383 AMAQI
18th Jul 2026494 AMAQI

17°C12/22°C

18th Jul 2026445 AMAQI
18th Jul 2026336 AMAQI
18th Jul 2026557 AMAQI
18th Jul 2026428 AMAQI
18th Jul 2026559 AMAQI
18th Jul 20265610 AMAQI
18th Jul 20264211 AMAQI
18th Jul 20263912 PMAQI
18th Jul 2026521 PMAQI
18th Jul 2026642 PMAQI
18th Jul 2026513 PMAQI
18th Jul 2026314 PMAQI
18th Jul 2026355 PMAQI
18th Jul 2026396 PMAQI
18th Jul 2026307 PMAQI
18th Jul 2026228 PMAQI
18th Jul 2026389 PMAQI
18th Jul 20265010 PMAQI
18th Jul 20264411 PMAQI
19th Jul 20264112 AMAQI
19th Jul 2026401 AMAQI
19th Jul 2026442 AMAQI
19th Jul 2026723 AMAQI
19th Jul 2026784 AMAQI

17°C10/24°C

19th Jul 2026675 AMAQI
19th Jul 2026466 AMAQI
19th Jul 2026527 AMAQI
19th Jul 2026618 AMAQI
19th Jul 2026469 AMAQI
19th Jul 20262810 AMAQI
19th Jul 20262811 AMAQI
19th Jul 20263412 PMAQI
19th Jul 2026281 PMAQI
19th Jul 2026382 PMAQI
19th Jul 2026233 PMAQI
19th Jul 2026514 PMAQI
19th Jul 2026505 PMAQI
19th Jul 2026516 PMAQI
19th Jul 2026647 PMAQI
19th Jul 2026468 PMAQI
19th Jul 2026389 PMAQI
19th Jul 20264210 PMAQI
19th Jul 20263811 PMAQI
20th Jul 20262812 AMAQI
20th Jul 2026301 AMAQI
20th Jul 2026262 AMAQI
20th Jul 2026283 AMAQI
20th Jul 2026384 AMAQI

19°C12/28°C

20th Jul 2026275 AMAQI
20th Jul 2026516 AMAQI
20th Jul 2026357 AMAQI
20th Jul 2026368 AMAQI
20th Jul 2026589 AMAQI
20th Jul 20264010 AMAQI
20th Jul 20263711 AMAQI
20th Jul 20263412 PMAQI
20th Jul 2026371 PMAQI
20th Jul 2026382 PMAQI
20th Jul 2026373 PMAQI
20th Jul 2026384 PMAQI
20th Jul 2026315 PMAQI
20th Jul 2026326 PMAQI
20th Jul 2026337 PMAQI
20th Jul 2026308 PMAQI
20th Jul 2026309 PMAQI
20th Jul 20263110 PMAQI
20th Jul 20264711 PMAQI
21st Jul 20264312 AMAQI
21st Jul 2026481 AMAQI
21st Jul 2026462 AMAQI
21st Jul 2026453 AMAQI
21st Jul 2026514 AMAQI

23°C14/33°C

21st Jul 2026485 AMAQI
21st Jul 2026486 AMAQI
21st Jul 2026427 AMAQI
21st Jul 2026458 AMAQI
21st Jul 2026429 AMAQI
21st Jul 20264410 AMAQI
21st Jul 20263911 AMAQI
21st Jul 20264212 PMAQI
21st Jul 2026511 PMAQI
21st Jul 2026482 PMAQI
21st Jul 2026453 PMAQI
21st Jul 2026464 PMAQI
21st Jul 2026485 PMAQI
21st Jul 2026506 PMAQI
21st Jul 2026487 PMAQI
21st Jul 2026468 PMAQI
21st Jul 2026469 PMAQI
21st Jul 20264610 PMAQI
21st Jul 20264811 PMAQI
22nd Jul 20264612 AMAQI
22nd Jul 2026431 AMAQI
22nd Jul 2026462 AMAQI
22nd Jul 2026503 AMAQI
22nd Jul 2026514 AMAQI

26°C15/37°C

22nd Jul 2026475 AMAQI
22nd Jul 2026506 AMAQI
22nd Jul 2026527 AMAQI
22nd Jul 2026518 AMAQI
22nd Jul 2026509 AMAQI
22nd Jul 20265110 AMAQI
22nd Jul 20265111 AMAQI
22nd Jul 20264612 PMAQI
22nd Jul 2026521 PMAQI
22nd Jul 2026522 PMAQI
22nd Jul 2026483 PMAQI
22nd Jul 2026504 PMAQI
22nd Jul 2026525 PMAQI
22nd Jul 2026516 PMAQI
22nd Jul 2026487 PMAQI
22nd Jul 2026508 PMAQI
22nd Jul 2026519 PMAQI
22nd Jul 20265010 PMAQI
22nd Jul 20265411 PMAQI
23rd Jul 20265212 AMAQI
23rd Jul 2026521 AMAQI
23rd Jul 2026452 AMAQI
23rd Jul 2026363 AMAQI
23rd Jul 2026464 AMAQI

27°C17/39°C

23rd Jul 2026445 AMAQI
23rd Jul 2026506 AMAQI
23rd Jul 2026567 AMAQI
23rd Jul 2026448 AMAQI
23rd Jul 2026419 AMAQI
23rd Jul 20264710 AMAQI
23rd Jul 20264811 AMAQI
23rd Jul 20264712 PMAQI
23rd Jul 2026501 PMAQI
23rd Jul 2026492 PMAQI
23rd Jul 2026523 PMAQI
23rd Jul 2026504 PMAQI
23rd Jul 2026255 PMAQI
23rd Jul 2026316 PMAQI
23rd Jul 2026387 PMAQI
23rd Jul 2026508 PMAQI
23rd Jul 2026579 PMAQI
23rd Jul 20264110 PMAQI
23rd Jul 20264511 PMAQI
24th Jul 20264212 AMAQI
24th Jul 2026481 AMAQI
24th Jul 2026412 AMAQI
24th Jul 2026443 AMAQI
24th Jul 2026474 AMAQI

20°C16/27°C

24th Jul 2026485 AMAQI
24th Jul 2026506 AMAQI
24th Jul 2026387 AMAQI
24th Jul 2026538 AMAQI
24th Jul 2026589 AMAQI
24th Jul 20266410 AMAQI
24th Jul 20266211 AMAQI
24th Jul 20265612 PMAQI
24th Jul 2026601 PMAQI
24th Jul 2026422 PMAQI
24th Jul 2026443 PMAQI
24th Jul 2026504 PMAQI
24th Jul 2026485 PMAQI
24th Jul 2026456 PMAQI
24th Jul 2026557 PMAQI
24th Jul 2026528 PMAQI
24th Jul 2026569 PMAQI
24th Jul 20266410 PMAQI
24th Jul 20264411 PMAQI
25th Jul 20264312 AMAQI
25th Jul 2026501 AMAQI
25th Jul 2026672 AMAQI
25th Jul 2026653 AMAQI
25th Jul 2026534 AMAQI

20°C14/30°C

25th Jul 2026515 AMAQI
25th Jul 2026626 AMAQI
25th Jul 2026577 AMAQI
25th Jul 2026528 AMAQI
25th Jul 2026629 AMAQI
25th Jul 20266410 AMAQI
25th Jul 20266411 AMAQI
25th Jul 20265612 PMAQI
25th Jul 2026341 PMAQI
25th Jul 2026402 PMAQI
25th Jul 2026463 PMAQI
25th Jul 2026624 PMAQI
25th Jul 2026705 PMAQI
25th Jul 2026516 PMAQI
25th Jul 2026647 PMAQI
25th Jul 2026628 PMAQI
25th Jul 2026619 PMAQI
25th Jul 20265710 PMAQI
25th Jul 20265811 PMAQI
26th Jul 20265012 AMAQI
26th Jul 2026491 AMAQI
26th Jul 2026412 AMAQI
26th Jul 2026363 AMAQI
26th Jul 2026444 AMAQI

18°C15/22°C

26th Jul 2026415 AMAQI
26th Jul 2026516 AMAQI
26th Jul 2026597 AMAQI
26th Jul 2026428 AMAQI
26th Jul 2026679 AMAQI
26th Jul 20267010 AMAQI
26th Jul 20266011 AMAQI
26th Jul 20265712 PMAQI
26th Jul 2026521 PMAQI
26th Jul 2026462 PMAQI
26th Jul 2026443 PMAQI
26th Jul 2026344 PMAQI
26th Jul 2026385 PMAQI
26th Jul 2026406 PMAQI
26th Jul 2026337 PMAQI
26th Jul 2026468 PMAQI
26th Jul 2026539 PMAQI
26th Jul 20264610 PMAQI
26th Jul 20266511 PMAQI
27th Jul 20266912 AMAQI
27th Jul 2026601 AMAQI
27th Jul 2026402 AMAQI
27th Jul 2026373 AMAQI
27th Jul 2026454 AMAQI

19°C14/25°C

27th Jul 2026475 AMAQI
27th Jul 2026526 AMAQI
27th Jul 2026577 AMAQI
27th Jul 2026628 AMAQI
27th Jul 2026589 AMAQI
27th Jul 20265610 AMAQI
27th Jul 20266411 AMAQI
27th Jul 20265612 PMAQI
27th Jul 2026641 PMAQI
27th Jul 2026642 PMAQI
27th Jul 2026593 PMAQI
27th Jul 2026404 PMAQI
27th Jul 2026515 PMAQI
27th Jul 2026386 PMAQI
27th Jul 2026407 PMAQI
27th Jul 2026598 PMAQI
27th Jul 2026589 PMAQI
27th Jul 20266210 PMAQI
27th Jul 20266011 PMAQI
28th Jul 20264212 AMAQI
28th Jul 2026561 AMAQI
28th Jul 2026582 AMAQI
28th Jul 2026603 AMAQI
28th Jul 2026624 AMAQI

20°C13/27°C

28th Jul 2026585 AMAQI
28th Jul 2026526 AMAQI
28th Jul 2026577 AMAQI
28th Jul 2026508 AMAQI
28th Jul 2026599 AMAQI
28th Jul 20266810 AMAQI
28th Jul 20266611 AMAQI
28th Jul 20265212 PMAQI
28th Jul 2026581 PMAQI
28th Jul 2026302 PMAQI
28th Jul 2026563 PMAQI
28th Jul 2026494 PMAQI
28th Jul 2026385 PMAQI
28th Jul 2026426 PMAQI
28th Jul 2026527 PMAQI
28th Jul 2026538 PMAQI
28th Jul 2026509 PMAQI
28th Jul 20263810 PMAQI
28th Jul 20264711 PMAQI
29th Jul 20264412 AMAQI
29th Jul 2026421 AMAQI
29th Jul 2026342 AMAQI
29th Jul 2026423 AMAQI
29th Jul 2026344 AMAQI

19°C14/23°C

29th Jul 2026445 AMAQI
29th Jul 2026336 AMAQI
29th Jul 2026207 AMAQI
29th Jul 2026248 AMAQI
29th Jul 2026529 AMAQI
29th Jul 20264610 AMAQI
29th Jul 20265011 AMAQI
29th Jul 20264412 PMAQI
29th Jul 2026441 PMAQI
29th Jul 2026442 PMAQI
29th Jul 2026403 PMAQI
29th Jul 2026304 PMAQI
29th Jul 2026225 PMAQI
29th Jul 2026306 PMAQI
29th Jul 2026467 PMAQI
29th Jul 2026328 PMAQI
29th Jul 2026259 PMAQI
29th Jul 20264410 PMAQI
29th Jul 20264011 PMAQI
30th Jul 20262712 AMAQI
30th Jul 2026401 AMAQI
30th Jul 2026592 AMAQI
30th Jul 2026583 AMAQI
30th Jul 2026454 AMAQI

18°C10/27°C

30th Jul 2026425 AMAQI
5 AM
30th Jul 2026296 AMAQI
30th Jul 2026347 AMAQI
30th Jul 2026288 AMAQI
30th Jul 2026569 AMAQI
30th Jul 20265210 AMAQI
30th Jul 20264611 AMAQI
30th Jul 20266612 PMAQI
30th Jul 2026401 PMAQI
1 PM
30th Jul 2026402 PMAQI
30th Jul 2026493 PMAQI
30th Jul 2026604 PMAQI
30th Jul 2026545 PMAQI
30th Jul 2026426 PMAQI
30th Jul 2026437 PMAQI
30th Jul 2026318 PMAQI
30th Jul 2026529 PMAQI
9 PM
30th Jul 20263610 PMAQI
30th Jul 20263011 PMAQI
1 AM
4 AM

19°C10/28°C

Day time
Avg. Highest Time
9 AM

41AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 PM - 9 PM

36AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 9 AM (Avg. 41), while the lowest AQI was between 5 PM to 9 PM (Avg. 36).
Night time
Avg. Highest Time
1 AM - 11 PM

37AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
12 AM

35AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 11 PM (Avg. 37), while the lowest AQI was between 12 AM to 12 AM (Avg. 35).

2026 Days Vs Air Quality

Chehalis, Washington, United States

2026

95%

197

5%

10

Total number of days with different AQI categories in last 211 days in 2026 (154 days remaining)

Good
197 Days
Moderate
10 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 95%

Health Risk Level:

Very Low

In 2026, 95% of 211 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

Chehalis, 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
47AQI (US)
2nd January 2026
42AQI (US)
3rd January 2026
32AQI (US)
4th January 2026
12AQI (US)
5th January 2026
15AQI (US)
6th January 2026
24AQI (US)
7th January 2026
13AQI (US)
8th January 2026
14AQI (US)
9th January 2026
20AQI (US)
10th January 2026
23AQI (US)
11th January 2026
24AQI (US)
12th January 2026
20AQI (US)
13th January 2026
25AQI (US)
14th January 2026
26AQI (US)
15th January 2026
24AQI (US)
16th January 2026
23AQI (US)
17th January 2026
44AQI (US)
18th January 2026
60AQI (US)
19th January 2026
60AQI (US)
20th January 2026
44AQI (US)
21st January 2026
46AQI (US)
22nd January 2026
49AQI (US)
23rd January 2026
52AQI (US)
24th January 2026
50AQI (US)
25th January 2026
48AQI (US)
26th January 2026
46AQI (US)
27th January 2026
44AQI (US)
28th January 2026
46AQI (US)
29th January 2026
49AQI (US)
30th January 2026
48AQI (US)
31st January 2026
44AQI (US)
1st February 2026
47AQI (US)
2nd February 2026
50AQI (US)
3rd February 2026
50AQI (US)
4th February 2026
49AQI (US)
5th February 2026
46AQI (US)
6th February 2026
42AQI (US)
7th February 2026
36AQI (US)
8th February 2026
44AQI (US)
9th February 2026
46AQI (US)
10th February 2026
46AQI (US)
11th February 2026
46AQI (US)
12th February 2026
44AQI (US)
13th February 2026
50AQI (US)
14th February 2026
50AQI (US)
15th February 2026
44AQI (US)
16th February 2026
42AQI (US)
17th February 2026
44AQI (US)
18th February 2026
44AQI (US)
19th February 2026
41AQI (US)
20th February 2026
42AQI (US)
21st February 2026
36AQI (US)
22nd February 2026
35AQI (US)
23rd February 2026
39AQI (US)
24th February 2026
41AQI (US)
25th February 2026
42AQI (US)
26th February 2026
36AQI (US)
27th February 2026
36AQI (US)
28th February 2026
35AQI (US)
1st March 2026
38AQI (US)
2nd March 2026
48AQI (US)
3rd March 2026
50AQI (US)
4th March 2026
46AQI (US)
5th March 2026
44AQI (US)
6th March 2026
39AQI (US)
7th March 2026
39AQI (US)
8th March 2026
40AQI (US)
9th March 2026
42AQI (US)
10th March 2026
36AQI (US)
11th March 2026
40AQI (US)
12th March 2026
42AQI (US)
13th March 2026
40AQI (US)
14th March 2026
38AQI (US)
15th March 2026
36AQI (US)
16th March 2026
36AQI (US)
17th March 2026
33AQI (US)
18th March 2026
32AQI (US)
19th March 2026
32AQI (US)
20th March 2026
36AQI (US)
21st March 2026
38AQI (US)
22nd March 2026
36AQI (US)
23rd March 2026
40AQI (US)
24th March 2026
36AQI (US)
25th March 2026
34AQI (US)
26th March 2026
30AQI (US)
27th March 2026
30AQI (US)
28th March 2026
34AQI (US)
29th March 2026
32AQI (US)
30th March 2026
28AQI (US)
31st March 2026
25AQI (US)
1st April 2026
30AQI (US)
2nd April 2026
33AQI (US)
3rd April 2026
28AQI (US)
4th April 2026
28AQI (US)
5th April 2026
30AQI (US)
6th April 2026
26AQI (US)
7th April 2026
26AQI (US)
8th April 2026
30AQI (US)
9th April 2026
28AQI (US)
10th April 2026
30AQI (US)
11th April 2026
32AQI (US)
12th April 2026
28AQI (US)
13th April 2026
32AQI (US)
14th April 2026
34AQI (US)
15th April 2026
35AQI (US)
16th April 2026
30AQI (US)
17th April 2026
18th April 2026
32AQI (US)
19th April 2026
33AQI (US)
20th April 2026
30AQI (US)
21st April 2026
28AQI (US)
22nd April 2026
23rd April 2026
23AQI (US)
24th April 2026
27AQI (US)
25th April 2026
30AQI (US)
26th April 2026
32AQI (US)
27th April 2026
30AQI (US)
28th April 2026
25AQI (US)
29th April 2026
24AQI (US)
30th April 2026
26AQI (US)
1st May 2026
27AQI (US)
2nd May 2026
24AQI (US)
3rd May 2026
22AQI (US)
4th May 2026
27AQI (US)
5th May 2026
32AQI (US)
6th May 2026
32AQI (US)
7th May 2026
30AQI (US)
8th May 2026
26AQI (US)
9th May 2026
10th May 2026
36AQI (US)
11th May 2026
33AQI (US)
12th May 2026
28AQI (US)
13th May 2026
27AQI (US)
14th May 2026
26AQI (US)
15th May 2026
38AQI (US)
16th May 2026
52AQI (US)
17th May 2026
56AQI (US)
18th May 2026
58AQI (US)
19th May 2026
56AQI (US)
20th May 2026
50AQI (US)
21st May 2026
46AQI (US)
22nd May 2026
46AQI (US)
23rd May 2026
50AQI (US)
24th May 2026
48AQI (US)
25th May 2026
44AQI (US)
26th May 2026
34AQI (US)
27th May 2026
28AQI (US)
28th May 2026
28AQI (US)
29th May 2026
26AQI (US)
30th May 2026
27AQI (US)
31st May 2026
29AQI (US)
1st June 2026
30AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
30AQI (US)
4th June 2026
27AQI (US)
5th June 2026
26AQI (US)
6th June 2026
26AQI (US)
7th June 2026
24AQI (US)
8th June 2026
26AQI (US)
9th June 2026
26AQI (US)
10th June 2026
26AQI (US)
11th June 2026
28AQI (US)
12th June 2026
28AQI (US)
13th June 2026
25AQI (US)
14th June 2026
24AQI (US)
15th June 2026
24AQI (US)
16th June 2026
27AQI (US)
17th June 2026
28AQI (US)
18th June 2026
28AQI (US)
19th June 2026
26AQI (US)
20th June 2026
24AQI (US)
21st June 2026
22AQI (US)
22nd June 2026
24AQI (US)
23rd June 2026
25AQI (US)
24th June 2026
24AQI (US)
25th June 2026
26AQI (US)
26th June 2026
27AQI (US)
27th June 2026
30AQI (US)
28th June 2026
28AQI (US)
29th June 2026
25AQI (US)
30th June 2026
26AQI (US)
1st July 2026
26AQI (US)
2nd July 2026
27AQI (US)
3rd July 2026
28AQI (US)
4th July 2026
26AQI (US)
5th July 2026
25AQI (US)
6th July 2026
26AQI (US)
7th July 2026
29AQI (US)
8th July 2026
28AQI (US)
9th July 2026
28AQI (US)
10th July 2026
32AQI (US)
11th July 2026
32AQI (US)
12th July 2026
30AQI (US)
13th July 2026
30AQI (US)
14th July 2026
30AQI (US)
15th July 2026
28AQI (US)
16th July 2026
30AQI (US)
17th July 2026
42AQI (US)
18th July 2026
43AQI (US)
19th July 2026
46AQI (US)
20th July 2026
36AQI (US)
21st July 2026
46AQI (US)
22nd July 2026
50AQI (US)
23rd July 2026
46AQI (US)
24th July 2026
50AQI (US)
25th July 2026
56AQI (US)
26th July 2026
48AQI (US)
27th July 2026
54AQI (US)
28th July 2026
52AQI (US)
29th July 2026
38AQI (US)
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
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

36AQI (US)

43AQI (US)

37AQI (US)

29AQI (US)

36AQI (US)

26AQI (US)

37AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202635AQI (US)

28
3
28
31
28
26
4
30
26
3
197
10

Highest AQI (US) recorded in

February

43AQI (US)

Lowest AQI (US) recorded in

June

26AQI (US)

202526AQI (US)

25
6
28
31
30
31
30
31
31
29
1
28
3
27
3
29
2
350
15

Highest AQI (US) recorded in

January

39AQI (US)

Lowest AQI (US) recorded in

May

16AQI (US)

202420AQI (US)

30
29
31
26
31
29
30
1
31
30
31
28
2
30
1
356
4

Highest AQI (US) recorded in

December

31AQI (US)

Lowest AQI (US) recorded in

June

13AQI (US)

202323AQI (US)

31
25
1
30
1
30
31
30
30
1
27
3
1
30
28
3
24
5
31
347
14
1

Highest AQI (US) recorded in

November

37AQI (US)

Lowest AQI (US) recorded in

April

14AQI (US)

202229AQI (US)

28
1
20
1
31
25
31
30
19
1
1
25
4
12
11
6
1
1
16
14
27
4
265
36
6
1
1

Highest AQI (US) recorded in

October

72AQI (US)

Lowest AQI (US) recorded in

May

12AQI (US)

202120AQI (US)

25
4
25
31
30
31
30
31
31
30
31
27
3
31
353
7

Highest AQI (US) recorded in

January

28AQI (US)

Lowest AQI (US) recorded in

May

14AQI (US)

202030AQI (US)

13
20
18
30
31
31
19
3
2
4
2
30
1
27
3
28
3
247
10
2
4
2

Highest AQI (US) recorded in

September

69AQI (US)

Lowest AQI (US) recorded in

June

20AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2026(Avg.)
35AQI (US)
Least Polluted Year Recorded
2021(Avg.)
20AQI (US)

Chehalis's annual 2026 AQI (US) (35) shows an average percentage change of 45.6% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (20), 2022 (29), 2023 (23), 2024 (20), 2025 (26).