Saint Charles, Missouri, 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
Saint Charles, Missouri, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Aug 2025
112AQILowest AQI recorded on
5th Aug 2025
32AQISame Day Analysis (8th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 9th Aug - 10th Aug 2025
Saint Charles, Missouri, United States
AQI
Day
Night
.
5 AM9th Aug 2025
8 PM
4 AM10th Aug 2025
Day time
Avg. Highest Time
4PM9th Aug
52AQI
Avg. Lowest Time
1PM9th Aug
44AQI
Night time
Avg. Highest Time
10PM9th Aug
52AQI
Avg. Lowest Time
4AM10th Aug
45AQI
In the last 24 hours,
Saint Charles's AQI reached its highest point of 52 at 4 PM during the Day, while the lowest point, 44, was recorded at 1 PM during the Day between 9th Aug and 10th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Saint Charles, Missouri, 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 - 10th10th
Day
Night
11th Jul 2025425 AMAQI
11th Jul 2025446 AMAQI
11th Jul 2025477 AMAQI
11th Jul 2025468 AMAQI
11th Jul 2025499 AMAQI
11th Jul 20254810 AMAQI
11th Jul 20255211 AMAQI
11th Jul 20255412 PMAQI
11th Jul 2025521 PMAQI
11th Jul 2025512 PMAQI
11th Jul 2025513 PMAQI
11th Jul 2025504 PMAQI
11th Jul 2025475 PMAQI
11th Jul 2025486 PMAQI
11th Jul 2025477 PMAQI
11th Jul 2025478 PMAQI
11th Jul 2025509 PMAQI
11th Jul 20254910 PMAQI
11th Jul 20255111 PMAQI
12th Jul 20254812 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025422 AMAQI
12th Jul 2025343 AMAQI
12th Jul 2025304 AMAQI
30°C24/38°C
12th Jul 2025295 AMAQI
12th Jul 2025276 AMAQI
12th Jul 2025277 AMAQI
12th Jul 2025278 AMAQI
12th Jul 2025289 AMAQI
12th Jul 20253010 AMAQI
12th Jul 20253411 AMAQI
12th Jul 20253612 PMAQI
12th Jul 2025371 PMAQI
12th Jul 2025382 PMAQI
12th Jul 2025383 PMAQI
12th Jul 2025364 PMAQI
12th Jul 2025345 PMAQI
12th Jul 2025346 PMAQI
12th Jul 2025357 PMAQI
12th Jul 2025338 PMAQI
12th Jul 2025309 PMAQI
12th Jul 20253010 PMAQI
12th Jul 20253311 PMAQI
13th Jul 20253612 AMAQI
13th Jul 2025391 AMAQI
13th Jul 2025382 AMAQI
13th Jul 2025383 AMAQI
13th Jul 2025384 AMAQI
28°C25/33°C
13th Jul 2025365 AMAQI
13th Jul 2025366 AMAQI
13th Jul 2025367 AMAQI
13th Jul 2025358 AMAQI
13th Jul 2025349 AMAQI
13th Jul 20253210 AMAQI
13th Jul 20253311 AMAQI
13th Jul 20253412 PMAQI
13th Jul 2025361 PMAQI
13th Jul 2025352 PMAQI
13th Jul 2025343 PMAQI
13th Jul 2025334 PMAQI
13th Jul 2025325 PMAQI
13th Jul 2025326 PMAQI
13th Jul 2025357 PMAQI
13th Jul 2025348 PMAQI
13th Jul 2025289 PMAQI
13th Jul 20253010 PMAQI
13th Jul 20253211 PMAQI
14th Jul 20252812 AMAQI
14th Jul 2025281 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025213 AMAQI
14th Jul 2025244 AMAQI
26°C23/30°C
14th Jul 2025235 AMAQI
14th Jul 2025286 AMAQI
14th Jul 2025347 AMAQI
14th Jul 2025348 AMAQI
14th Jul 2025369 AMAQI
14th Jul 20253610 AMAQI
14th Jul 20253811 AMAQI
14th Jul 20253512 PMAQI
14th Jul 2025341 PMAQI
14th Jul 2025342 PMAQI
14th Jul 2025383 PMAQI
14th Jul 2025374 PMAQI
14th Jul 2025365 PMAQI
14th Jul 2025376 PMAQI
14th Jul 2025347 PMAQI
14th Jul 2025338 PMAQI
14th Jul 2025349 PMAQI
14th Jul 20253510 PMAQI
14th Jul 20253611 PMAQI
15th Jul 20253612 AMAQI
15th Jul 2025391 AMAQI
15th Jul 2025402 AMAQI
15th Jul 2025413 AMAQI
15th Jul 2025404 AMAQI
26°C23/33°C
15th Jul 2025405 AMAQI
15th Jul 2025406 AMAQI
15th Jul 2025397 AMAQI
15th Jul 2025408 AMAQI
15th Jul 2025379 AMAQI
15th Jul 20253610 AMAQI
15th Jul 20253711 AMAQI
15th Jul 20253812 PMAQI
15th Jul 2025381 PMAQI
15th Jul 2025392 PMAQI
15th Jul 2025383 PMAQI
15th Jul 2025404 PMAQI
15th Jul 2025405 PMAQI
15th Jul 2025366 PMAQI
15th Jul 2025387 PMAQI
15th Jul 2025388 PMAQI
15th Jul 2025309 PMAQI
15th Jul 20253210 PMAQI
15th Jul 20253211 PMAQI
16th Jul 20253612 AMAQI
16th Jul 2025351 AMAQI
16th Jul 2025332 AMAQI
16th Jul 2025343 AMAQI
16th Jul 2025354 AMAQI
28°C25/32°C
16th Jul 2025325 AMAQI
16th Jul 2025316 AMAQI
16th Jul 2025337 AMAQI
16th Jul 2025328 AMAQI
16th Jul 2025349 AMAQI
16th Jul 20253610 AMAQI
16th Jul 20254211 AMAQI
16th Jul 20254612 PMAQI
16th Jul 2025481 PMAQI
16th Jul 2025442 PMAQI
16th Jul 2025473 PMAQI
16th Jul 2025444 PMAQI
16th Jul 2025425 PMAQI
16th Jul 2025376 PMAQI
16th Jul 2025377 PMAQI
16th Jul 2025358 PMAQI
16th Jul 2025329 PMAQI
16th Jul 20253010 PMAQI
16th Jul 20253211 PMAQI
17th Jul 20253212 AMAQI
17th Jul 2025371 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
17th Jul 2025424 AMAQI
30°C23/38°C
17th Jul 2025305 AMAQI
17th Jul 2025286 AMAQI
17th Jul 2025307 AMAQI
17th Jul 2025298 AMAQI
17th Jul 2025309 AMAQI
17th Jul 20253510 AMAQI
17th Jul 20253411 AMAQI
17th Jul 20253512 PMAQI
17th Jul 2025381 PMAQI
17th Jul 2025422 PMAQI
17th Jul 2025383 PMAQI
17th Jul 2025384 PMAQI
17th Jul 2025345 PMAQI
17th Jul 2025326 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025338 PMAQI
17th Jul 2025309 PMAQI
17th Jul 20252910 PMAQI
17th Jul 20252911 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025271 AMAQI
18th Jul 2025222 AMAQI
18th Jul 2025243 AMAQI
18th Jul 2025244 AMAQI
27°C24/33°C
18th Jul 2025225 AMAQI
18th Jul 2025246 AMAQI
18th Jul 2025247 AMAQI
18th Jul 2025268 AMAQI
18th Jul 2025279 AMAQI
18th Jul 20252910 AMAQI
18th Jul 20253111 AMAQI
18th Jul 20253012 PMAQI
18th Jul 2025321 PMAQI
18th Jul 2025332 PMAQI
18th Jul 2025343 PMAQI
18th Jul 2025374 PMAQI
18th Jul 2025385 PMAQI
18th Jul 2025416 PMAQI
18th Jul 2025317 PMAQI
18th Jul 2025298 PMAQI
18th Jul 2025429 PMAQI
18th Jul 20254210 PMAQI
18th Jul 20254611 PMAQI
19th Jul 20255212 AMAQI
19th Jul 2025531 AMAQI
19th Jul 2025562 AMAQI
19th Jul 2025563 AMAQI
19th Jul 2025544 AMAQI
27°C24/34°C
19th Jul 2025525 AMAQI
19th Jul 2025496 AMAQI
19th Jul 2025497 AMAQI
19th Jul 2025438 AMAQI
19th Jul 2025419 AMAQI
19th Jul 20254210 AMAQI
19th Jul 20254611 AMAQI
19th Jul 20255012 PMAQI
19th Jul 2025531 PMAQI
19th Jul 2025542 PMAQI
19th Jul 2025523 PMAQI
19th Jul 2025454 PMAQI
19th Jul 2025405 PMAQI
19th Jul 2025416 PMAQI
19th Jul 2025487 PMAQI
19th Jul 2025508 PMAQI
19th Jul 2025529 PMAQI
19th Jul 20255210 PMAQI
19th Jul 20255211 PMAQI
20th Jul 20255212 AMAQI
20th Jul 2025531 AMAQI
20th Jul 2025552 AMAQI
20th Jul 2025573 AMAQI
20th Jul 2025554 AMAQI
29°C24/35°C
20th Jul 2025545 AMAQI
20th Jul 2025546 AMAQI
20th Jul 2025547 AMAQI
20th Jul 2025548 AMAQI
20th Jul 2025549 AMAQI
20th Jul 20255410 AMAQI
20th Jul 20255511 AMAQI
20th Jul 20255312 PMAQI
20th Jul 2025531 PMAQI
20th Jul 2025532 PMAQI
20th Jul 2025533 PMAQI
20th Jul 2025534 PMAQI
20th Jul 2025545 PMAQI
20th Jul 2025546 PMAQI
20th Jul 2025547 PMAQI
20th Jul 2025538 PMAQI
20th Jul 2025509 PMAQI
20th Jul 20255010 PMAQI
20th Jul 20255011 PMAQI
21st Jul 20255012 AMAQI
21st Jul 2025461 AMAQI
21st Jul 2025362 AMAQI
21st Jul 2025323 AMAQI
21st Jul 2025304 AMAQI
32°C26/39°C
21st Jul 2025205 AMAQI
21st Jul 2025196 AMAQI
21st Jul 2025217 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025229 AMAQI
21st Jul 20252310 AMAQI
21st Jul 20252311 AMAQI
21st Jul 20252312 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025272 PMAQI
21st Jul 2025273 PMAQI
21st Jul 2025304 PMAQI
21st Jul 2025305 PMAQI
21st Jul 2025306 PMAQI
21st Jul 2025287 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025369 PMAQI
21st Jul 20253410 PMAQI
21st Jul 20253511 PMAQI
22nd Jul 20253512 AMAQI
22nd Jul 2025351 AMAQI
22nd Jul 2025322 AMAQI
22nd Jul 2025323 AMAQI
22nd Jul 2025324 AMAQI
26°C23/30°C
22nd Jul 2025395 AMAQI
22nd Jul 2025486 AMAQI
22nd Jul 2025467 AMAQI
22nd Jul 2025428 AMAQI
22nd Jul 2025439 AMAQI
22nd Jul 20254310 AMAQI
22nd Jul 20254311 AMAQI
22nd Jul 20254412 PMAQI
22nd Jul 2025441 PMAQI
22nd Jul 2025482 PMAQI
22nd Jul 2025523 PMAQI
22nd Jul 2025524 PMAQI
22nd Jul 2025545 PMAQI
22nd Jul 2025536 PMAQI
22nd Jul 2025467 PMAQI
22nd Jul 2025468 PMAQI
22nd Jul 2025489 PMAQI
22nd Jul 20254910 PMAQI
22nd Jul 20254811 PMAQI
23rd Jul 20255012 AMAQI
23rd Jul 2025521 AMAQI
23rd Jul 2025522 AMAQI
23rd Jul 2025503 AMAQI
23rd Jul 2025524 AMAQI
29°C24/36°C
23rd Jul 2025545 AMAQI
23rd Jul 2025546 AMAQI
23rd Jul 2025547 AMAQI
23rd Jul 2025538 AMAQI
23rd Jul 2025569 AMAQI
23rd Jul 20255710 AMAQI
23rd Jul 20255811 AMAQI
23rd Jul 20255812 PMAQI
23rd Jul 2025571 PMAQI
23rd Jul 2025602 PMAQI
23rd Jul 2025593 PMAQI
23rd Jul 2025584 PMAQI
23rd Jul 2025555 PMAQI
23rd Jul 2025586 PMAQI
23rd Jul 2025567 PMAQI
23rd Jul 2025568 PMAQI
23rd Jul 2025589 PMAQI
23rd Jul 20255710 PMAQI
23rd Jul 20255711 PMAQI
24th Jul 20255812 AMAQI
24th Jul 2025571 AMAQI
24th Jul 2025562 AMAQI
24th Jul 2025563 AMAQI
24th Jul 2025574 AMAQI
31°C26/38°C
24th Jul 2025585 AMAQI
24th Jul 2025566 AMAQI
24th Jul 2025607 AMAQI
24th Jul 2025588 AMAQI
24th Jul 2025589 AMAQI
24th Jul 20255810 AMAQI
24th Jul 20255811 AMAQI
24th Jul 20255712 PMAQI
24th Jul 2025581 PMAQI
24th Jul 2025572 PMAQI
24th Jul 2025563 PMAQI
24th Jul 2025564 PMAQI
24th Jul 2025575 PMAQI
24th Jul 2025566 PMAQI
24th Jul 2025577 PMAQI
24th Jul 2025588 PMAQI
24th Jul 2025569 PMAQI
24th Jul 20255510 PMAQI
24th Jul 20255611 PMAQI
25th Jul 20255612 AMAQI
25th Jul 2025541 AMAQI
25th Jul 2025392 AMAQI
25th Jul 2025353 AMAQI
25th Jul 2025384 AMAQI
31°C25/38°C
25th Jul 2025335 AMAQI
25th Jul 2025306 AMAQI
25th Jul 2025287 AMAQI
25th Jul 2025288 AMAQI
25th Jul 2025329 AMAQI
25th Jul 20253410 AMAQI
25th Jul 20254011 AMAQI
25th Jul 20254912 PMAQI
25th Jul 2025541 PMAQI
25th Jul 2025552 PMAQI
25th Jul 2025553 PMAQI
25th Jul 2025564 PMAQI
25th Jul 2025565 PMAQI
25th Jul 2025546 PMAQI
25th Jul 2025537 PMAQI
25th Jul 2025528 PMAQI
25th Jul 2025529 PMAQI
25th Jul 20255210 PMAQI
25th Jul 20255311 PMAQI
26th Jul 20255312 AMAQI
26th Jul 2025531 AMAQI
26th Jul 2025532 AMAQI
26th Jul 2025523 AMAQI
26th Jul 2025524 AMAQI
30°C25/37°C
26th Jul 2025515 AMAQI
26th Jul 2025516 AMAQI
26th Jul 2025507 AMAQI
26th Jul 2025508 AMAQI
26th Jul 2025519 AMAQI
26th Jul 20255010 AMAQI
26th Jul 20255011 AMAQI
26th Jul 20254812 PMAQI
26th Jul 2025441 PMAQI
26th Jul 2025412 PMAQI
26th Jul 2025453 PMAQI
26th Jul 2025444 PMAQI
26th Jul 2025445 PMAQI
26th Jul 2025416 PMAQI
26th Jul 2025467 PMAQI
26th Jul 2025498 PMAQI
26th Jul 2025389 PMAQI
26th Jul 20253810 PMAQI
26th Jul 20253811 PMAQI
27th Jul 20254012 AMAQI
27th Jul 2025381 AMAQI
27th Jul 2025302 AMAQI
27th Jul 2025263 AMAQI
27th Jul 2025244 AMAQI
31°C26/37°C
27th Jul 2025165 AMAQI
27th Jul 2025166 AMAQI
27th Jul 2025187 AMAQI
27th Jul 2025188 AMAQI
27th Jul 2025199 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252411 AMAQI
27th Jul 20252412 PMAQI
27th Jul 2025271 PMAQI
27th Jul 2025282 PMAQI
27th Jul 2025303 PMAQI
27th Jul 2025324 PMAQI
27th Jul 2025335 PMAQI
27th Jul 2025366 PMAQI
27th Jul 2025317 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025359 PMAQI
27th Jul 20253310 PMAQI
27th Jul 20253311 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025301 AMAQI
28th Jul 2025302 AMAQI
28th Jul 2025303 AMAQI
28th Jul 2025294 AMAQI
31°C26/35°C
28th Jul 2025325 AMAQI
28th Jul 2025346 AMAQI
28th Jul 2025327 AMAQI
28th Jul 2025338 AMAQI
28th Jul 2025369 AMAQI
28th Jul 20254010 AMAQI
28th Jul 20254111 AMAQI
28th Jul 20254112 PMAQI
28th Jul 2025421 PMAQI
28th Jul 2025452 PMAQI
28th Jul 2025433 PMAQI
28th Jul 2025444 PMAQI
28th Jul 2025425 PMAQI
28th Jul 2025446 PMAQI
28th Jul 2025397 PMAQI
28th Jul 2025398 PMAQI
28th Jul 2025439 PMAQI
28th Jul 20254510 PMAQI
28th Jul 20254511 PMAQI
29th Jul 20254612 AMAQI
29th Jul 2025491 AMAQI
29th Jul 2025522 AMAQI
29th Jul 2025533 AMAQI
29th Jul 2025514 AMAQI
32°C27/37°C
29th Jul 2025525 AMAQI
29th Jul 2025536 AMAQI
29th Jul 2025527 AMAQI
29th Jul 2025538 AMAQI
29th Jul 2025539 AMAQI
29th Jul 20254610 AMAQI
29th Jul 20254311 AMAQI
29th Jul 20254412 PMAQI
29th Jul 2025441 PMAQI
29th Jul 2025442 PMAQI
29th Jul 2025483 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025485 PMAQI
29th Jul 2025486 PMAQI
29th Jul 2025497 PMAQI
29th Jul 2025508 PMAQI
29th Jul 2025469 PMAQI
29th Jul 20254510 PMAQI
29th Jul 20254611 PMAQI
30th Jul 20254812 AMAQI
30th Jul 2025481 AMAQI
30th Jul 2025422 AMAQI
30th Jul 2025403 AMAQI
30th Jul 2025434 AMAQI
32°C26/39°C
30th Jul 2025475 AMAQI
30th Jul 2025436 AMAQI
30th Jul 2025477 AMAQI
30th Jul 2025518 AMAQI
30th Jul 2025539 AMAQI
30th Jul 20255310 AMAQI
30th Jul 20255211 AMAQI
30th Jul 20255312 PMAQI
30th Jul 2025531 PMAQI
30th Jul 2025542 PMAQI
30th Jul 2025543 PMAQI
30th Jul 2025544 PMAQI
30th Jul 2025545 PMAQI
30th Jul 2025546 PMAQI
30th Jul 2025547 PMAQI
30th Jul 2025548 PMAQI
30th Jul 2025419 PMAQI
30th Jul 20254010 PMAQI
30th Jul 20254011 PMAQI
31st Jul 20253812 AMAQI
31st Jul 2025361 AMAQI
31st Jul 2025272 AMAQI
31st Jul 2025273 AMAQI
31st Jul 2025264 AMAQI
31°C22/36°C
31st Jul 2025215 AMAQI
31st Jul 2025216 AMAQI
31st Jul 2025267 AMAQI
31st Jul 2025308 AMAQI
31st Jul 2025309 AMAQI
31st Jul 20253210 AMAQI
31st Jul 20253611 AMAQI
31st Jul 20253412 PMAQI
31st Jul 2025361 PMAQI
31st Jul 2025432 PMAQI
31st Jul 2025513 PMAQI
31st Jul 2025544 PMAQI
31st Jul 2025535 PMAQI
31st Jul 2025526 PMAQI
31st Jul 2025287 PMAQI
31st Jul 2025488 PMAQI
31st Jul 2025779 PMAQI
31st Jul 20259110 PMAQI
31st Jul 202510511 PMAQI
1st Aug 202510712 AMAQI
1st Aug 20251161 AMAQI
1st Aug 20251072 AMAQI
1st Aug 20251003 AMAQI
1st Aug 20251174 AMAQI
25°C23/27°C
1st Aug 20251335 AMAQI
1st Aug 20251376 AMAQI
1st Aug 20251377 AMAQI
1st Aug 20251358 AMAQI
1st Aug 20251429 AMAQI
1st Aug 202512810 AMAQI
1st Aug 202513411 AMAQI
1st Aug 202511712 PMAQI
1st Aug 20251011 PMAQI
1st Aug 2025982 PMAQI
1st Aug 2025943 PMAQI
1st Aug 2025944 PMAQI
1st Aug 2025945 PMAQI
1st Aug 2025966 PMAQI
1st Aug 20251227 PMAQI
1st Aug 20251108 PMAQI
1st Aug 2025969 PMAQI
1st Aug 20259410 PMAQI
1st Aug 20259711 PMAQI
2nd Aug 20259412 AMAQI
2nd Aug 2025941 AMAQI
2nd Aug 2025962 AMAQI
2nd Aug 2025953 AMAQI
2nd Aug 2025964 AMAQI
24°C18/30°C
2nd Aug 2025955 AMAQI
2nd Aug 2025986 AMAQI
2nd Aug 2025967 AMAQI
2nd Aug 20251018 AMAQI
2nd Aug 2025999 AMAQI
2nd Aug 20259410 AMAQI
2nd Aug 20258911 AMAQI
2nd Aug 20257612 PMAQI
2nd Aug 2025661 PMAQI
2nd Aug 2025622 PMAQI
2nd Aug 2025583 PMAQI
2nd Aug 2025564 PMAQI
2nd Aug 2025545 PMAQI
2nd Aug 2025536 PMAQI
2nd Aug 2025827 PMAQI
2nd Aug 2025728 PMAQI
2nd Aug 2025519 PMAQI
2nd Aug 20255210 PMAQI
2nd Aug 20255311 PMAQI
3rd Aug 20255212 AMAQI
3rd Aug 2025481 AMAQI
3rd Aug 2025462 AMAQI
3rd Aug 2025493 AMAQI
3rd Aug 2025504 AMAQI
22°C17/29°C
3rd Aug 2025465 AMAQI
3rd Aug 2025466 AMAQI
3rd Aug 2025477 AMAQI
3rd Aug 2025468 AMAQI
3rd Aug 2025469 AMAQI
3rd Aug 20254310 AMAQI
3rd Aug 20254111 AMAQI
3rd Aug 20254012 PMAQI
3rd Aug 2025381 PMAQI
3rd Aug 2025412 PMAQI
3rd Aug 2025423 PMAQI
3rd Aug 2025394 PMAQI
3rd Aug 2025395 PMAQI
3rd Aug 2025406 PMAQI
3rd Aug 2025457 PMAQI
3rd Aug 2025388 PMAQI
3rd Aug 2025369 PMAQI
3rd Aug 20253910 PMAQI
3rd Aug 20253811 PMAQI
4th Aug 20254112 AMAQI
4th Aug 2025401 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025373 AMAQI
4th Aug 2025354 AMAQI
23°C16/28°C
4th Aug 2025335 AMAQI
4th Aug 2025346 AMAQI
4th Aug 2025347 AMAQI
4th Aug 2025348 AMAQI
4th Aug 2025379 AMAQI
4th Aug 20253710 AMAQI
4th Aug 20253811 AMAQI
4th Aug 20254112 PMAQI
4th Aug 2025411 PMAQI
4th Aug 2025422 PMAQI
4th Aug 2025423 PMAQI
4th Aug 2025434 PMAQI
4th Aug 2025405 PMAQI
4th Aug 2025396 PMAQI
4th Aug 2025397 PMAQI
4th Aug 2025338 PMAQI
4th Aug 2025309 PMAQI
4th Aug 20253010 PMAQI
4th Aug 20252611 PMAQI
5th Aug 20252812 AMAQI
5th Aug 2025321 AMAQI
5th Aug 2025242 AMAQI
5th Aug 2025233 AMAQI
5th Aug 2025224 AMAQI
25°C19/31°C
5th Aug 2025245 AMAQI
5th Aug 2025246 AMAQI
5th Aug 2025257 AMAQI
5th Aug 2025278 AMAQI
5th Aug 2025319 AMAQI
5th Aug 20253710 AMAQI
5th Aug 20254111 AMAQI
5th Aug 20253812 PMAQI
5th Aug 2025381 PMAQI
5th Aug 2025402 PMAQI
5th Aug 2025403 PMAQI
5th Aug 2025434 PMAQI
5th Aug 2025445 PMAQI
5th Aug 2025386 PMAQI
5th Aug 2025317 PMAQI
5th Aug 2025348 PMAQI
5th Aug 2025349 PMAQI
5th Aug 20253410 PMAQI
5th Aug 20253311 PMAQI
6th Aug 20253512 AMAQI
6th Aug 2025391 AMAQI
6th Aug 2025372 AMAQI
6th Aug 2025373 AMAQI
6th Aug 2025384 AMAQI
26°C22/32°C
6th Aug 2025465 AMAQI
6th Aug 2025446 AMAQI
6th Aug 2025427 AMAQI
6th Aug 2025448 AMAQI
6th Aug 2025509 AMAQI
6th Aug 20255210 AMAQI
6th Aug 20255711 AMAQI
6th Aug 20255612 PMAQI
6th Aug 2025581 PMAQI
6th Aug 2025602 PMAQI
6th Aug 2025603 PMAQI
6th Aug 2025594 PMAQI
6th Aug 2025575 PMAQI
6th Aug 2025586 PMAQI
6th Aug 2025447 PMAQI
6th Aug 2025478 PMAQI
6th Aug 2025549 PMAQI
6th Aug 20255510 PMAQI
6th Aug 20255611 PMAQI
7th Aug 20255612 AMAQI
7th Aug 2025541 AMAQI
7th Aug 2025502 AMAQI
7th Aug 2025503 AMAQI
7th Aug 2025484 AMAQI
28°C21/35°C
7th Aug 2025525 AMAQI
7th Aug 2025526 AMAQI
7th Aug 2025527 AMAQI
7th Aug 2025548 AMAQI
7th Aug 2025559 AMAQI
7th Aug 20255510 AMAQI
7th Aug 20255411 AMAQI
7th Aug 20255412 PMAQI
7th Aug 2025551 PMAQI
7th Aug 2025552 PMAQI
7th Aug 2025563 PMAQI
7th Aug 2025554 PMAQI
7th Aug 2025565 PMAQI
7th Aug 2025556 PMAQI
7th Aug 2025557 PMAQI
7th Aug 2025558 PMAQI
7th Aug 2025549 PMAQI
7th Aug 20255510 PMAQI
7th Aug 20255411 PMAQI
8th Aug 20255412 AMAQI
8th Aug 2025541 AMAQI
8th Aug 2025542 AMAQI
8th Aug 2025533 AMAQI
8th Aug 2025524 AMAQI
30°C25/34°C
8th Aug 2025535 AMAQI
8th Aug 2025526 AMAQI
8th Aug 2025527 AMAQI
8th Aug 2025528 AMAQI
8th Aug 2025539 AMAQI
8th Aug 20255410 AMAQI
8th Aug 20255411 AMAQI
8th Aug 20255212 PMAQI
8th Aug 2025521 PMAQI
8th Aug 2025532 PMAQI
8th Aug 2025533 PMAQI
8th Aug 2025544 PMAQI
8th Aug 2025545 PMAQI
8th Aug 2025526 PMAQI
8th Aug 2025537 PMAQI
8th Aug 2025538 PMAQI
8th Aug 2025529 PMAQI
8th Aug 20255310 PMAQI
8th Aug 20255411 PMAQI
9th Aug 20255412 AMAQI
9th Aug 2025531 AMAQI
9th Aug 2025502 AMAQI
9th Aug 2025503 AMAQI
9th Aug 2025484 AMAQI
31°C26/38°C
9th Aug 2025505 AMAQI
9th Aug 2025516 AMAQI
9th Aug 2025487 AMAQI
9th Aug 2025478 AMAQI
9th Aug 2025489 AMAQI
9th Aug 20254610 AMAQI
9th Aug 20254411 AMAQI
9th Aug 20254412 PMAQI
9th Aug 2025441 PMAQI
9th Aug 2025472 PMAQI
9th Aug 2025503 PMAQI
9th Aug 2025524 PMAQI
9th Aug 2025525 PMAQI
9th Aug 2025526 PMAQI
9th Aug 2025527 PMAQI
9th Aug 2025518 PMAQI
9th Aug 2025519 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 PMAQI
10th Aug 20255212 AMAQI
10th Aug 2025511 AMAQI
10th Aug 2025492 AMAQI
10th Aug 2025473 AMAQI
10th Aug 2025454 AMAQI
31°C25/38°C
10th Aug 2025435 AMAQI
5 AM12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
46AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
46AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 46), while the lowest AQI was between 5 AM to 8 PM (Avg. 46).
Night time
Avg. Highest Time
12 AM - 1 AM
48AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
2 AM - 11 PM
45AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 48), while the lowest AQI was between 2 AM to 11 PM (Avg. 45).
2025 Days Vs Air Quality
Saint Charles, Missouri, United States
2025
79%
106
21%
28
0.7%
1
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Good
106 DaysModerate
28 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 222 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
Saint Charles, Missouri, United States
AQI levels in 2025
AQI
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.
1st March 2025
51AQI
51AQI
2nd March 2025
37AQI
37AQI
3rd March 2025
40AQI
40AQI
4th March 2025
25AQI
25AQI
5th March 2025
17AQI
17AQI
1st April 2025
33AQI
33AQI
2nd April 2025
38AQI
38AQI
3rd April 2025
30AQI
30AQI
4th April 2025
26AQI
26AQI
5th April 2025
24AQI
24AQI
6th April 2025
21AQI
21AQI
7th April 2025
32AQI
32AQI
8th April 2025
22AQI
22AQI
9th April 2025
29AQI
29AQI
10th April 2025
41AQI
41AQI
11th April 2025
40AQI
40AQI
12th April 2025
56AQI
56AQI
13th April 2025
42AQI
42AQI
14th April 2025
39AQI
39AQI
15th April 2025
23AQI
23AQI
16th April 2025
38AQI
38AQI
17th April 2025
48AQI
48AQI
18th April 2025
56AQI
56AQI
19th April 2025
46AQI
46AQI
20th April 2025
50AQI
50AQI
21st April 2025
22AQI
22AQI
22nd April 2025
38AQI
38AQI
23rd April 2025
40AQI
40AQI
24th April 2025
46AQI
46AQI
25th April 2025
37AQI
37AQI
26th April 2025
25AQI
25AQI
27th April 2025
26AQI
26AQI
28th April 2025
40AQI
40AQI
29th April 2025
33AQI
33AQI
30th April 2025
31AQI
31AQI
1st May 2025
26AQI
26AQI
2nd May 2025
28AQI
28AQI
3rd May 2025
27AQI
27AQI
4th May 2025
19AQI
19AQI
5th May 2025
19AQI
19AQI
6th May 2025
33AQI
33AQI
7th May 2025
29AQI
29AQI
8th May 2025
31AQI
31AQI
9th May 2025
28AQI
28AQI
10th May 2025
39AQI
39AQI
11th May 2025
37AQI
37AQI
12th May 2025
36AQI
36AQI
13th May 2025
30AQI
30AQI
14th May 2025
38AQI
38AQI
15th May 2025
56AQI
56AQI
16th May 2025
43AQI
43AQI
17th May 2025
29AQI
29AQI
18th May 2025
25AQI
25AQI
19th May 2025
32AQI
32AQI
20th May 2025
26AQI
26AQI
21st May 2025
16AQI
16AQI
22nd May 2025
15AQI
15AQI
23rd May 2025
21AQI
21AQI
24th May 2025
30AQI
30AQI
25th May 2025
35AQI
35AQI
26th May 2025
22AQI
22AQI
27th May 2025
25AQI
25AQI
28th May 2025
26AQI
26AQI
29th May 2025
47AQI
47AQI
30th May 2025
31AQI
31AQI
31st May 2025
43AQI
43AQI
1st June 2025
41AQI
41AQI
2nd June 2025
49AQI
49AQI
3rd June 2025
58AQI
58AQI
4th June 2025
49AQI
49AQI
5th June 2025
41AQI
41AQI
6th June 2025
52AQI
52AQI
7th June 2025
81AQI
81AQI
8th June 2025
56AQI
56AQI
9th June 2025
59AQI
59AQI
10th June 2025
62AQI
62AQI
11th June 2025
76AQI
76AQI
12th June 2025
78AQI
78AQI
13th June 2025
49AQI
49AQI
14th June 2025
34AQI
34AQI
15th June 2025
44AQI
44AQI
16th June 2025
31AQI
31AQI
17th June 2025
39AQI
39AQI
18th June 2025
35AQI
35AQI
19th June 2025
25AQI
25AQI
20th June 2025
43AQI
43AQI
21st June 2025
51AQI
51AQI
22nd June 2025
53AQI
53AQI
23rd June 2025
58AQI
58AQI
24th June 2025
54AQI
54AQI
25th June 2025
52AQI
52AQI
26th June 2025
49AQI
49AQI
27th June 2025
36AQI
36AQI
28th June 2025
27AQI
27AQI
29th June 2025
25AQI
25AQI
30th June 2025
28AQI
28AQI
1st July 2025
30AQI
30AQI
2nd July 2025
46AQI
46AQI
3rd July 2025
54AQI
54AQI
4th July 2025
63AQI
63AQI
5th July 2025
81AQI
81AQI
6th July 2025
60AQI
60AQI
7th July 2025
42AQI
42AQI
8th July 2025
51AQI
51AQI
9th July 2025
36AQI
36AQI
10th July 2025
41AQI
41AQI
11th July 2025
47AQI
47AQI
12th July 2025
34AQI
34AQI
13th July 2025
35AQI
35AQI
14th July 2025
31AQI
31AQI
15th July 2025
37AQI
37AQI
16th July 2025
36AQI
36AQI
17th July 2025
35AQI
35AQI
18th July 2025
31AQI
31AQI
19th July 2025
50AQI
50AQI
20th July 2025
53AQI
53AQI
21st July 2025
30AQI
30AQI
22nd July 2025
43AQI
43AQI
23rd July 2025
55AQI
55AQI
24th July 2025
57AQI
57AQI
25th July 2025
46AQI
46AQI
26th July 2025
47AQI
47AQI
27th July 2025
28AQI
28AQI
28th July 2025
38AQI
38AQI
29th July 2025
49AQI
49AQI
30th July 2025
48AQI
48AQI
31st July 2025
43AQI
43AQI
1st August 2025
112AQI
112AQI
2nd August 2025
78AQI
78AQI
3rd August 2025
43AQI
43AQI
4th August 2025
36AQI
36AQI
5th August 2025
32AQI
32AQI
6th August 2025
49AQI
49AQI
7th August 2025
54AQI
54AQI
8th August 2025
53AQI
53AQI
34AQI
36AQI
30AQI
48AQI
44AQI
57AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202540AQI
4
1
28
2
30
1
17
13
23
8
4
3
1
106
28
1
Highest AQI recorded in
August57AQI
Lowest AQI recorded in
May30AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
40AQILeast Polluted Year Recorded
2025(Avg.)
40AQISaint Charles's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
