St. Louis, 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+
July Air Quality Analysis
St. Louis, Missouri, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
23rd Jul 2021
106AQILowest AQI recorded on
16th Jul 2021
24AQISame Day Analysis (30th July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 46 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 30th Jul - 31st Jul 2025
St. Louis, Missouri, United States
AQI
Day
Night
.
5 AM30th Jul 2025
8 PM
4 AM31st Jul 2025
Day time
Avg. Highest Time
9AM30th Jul
55AQI
Avg. Lowest Time
8PM30th Jul
43AQI
Night time
Avg. Highest Time
5AM30th Jul
48AQI
Avg. Lowest Time
4AM31st Jul
30AQI
In the last 24 hours,
St. Louis's AQI reached its highest point of 55 at 9 AM during the Day, while the lowest point, 30, was recorded at 4 AM during the Night between 30th Jul and 31st Jul 2025.
Day & Night AQI Trend : Jul 2025
St. Louis, Missouri, 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 - 31st31st
Day
Night
1st Jul 2025225 AMAQI
1st Jul 2025236 AMAQI
1st Jul 2025257 AMAQI
1st Jul 2025258 AMAQI
1st Jul 2025279 AMAQI
1st Jul 20252810 AMAQI
1st Jul 20252811 AMAQI
1st Jul 20252712 PMAQI
1st Jul 2025281 PMAQI
1st Jul 2025332 PMAQI
1st Jul 2025333 PMAQI
1st Jul 2025324 PMAQI
1st Jul 2025325 PMAQI
1st Jul 2025306 PMAQI
1st Jul 2025297 PMAQI
1st Jul 2025288 PMAQI
1st Jul 2025269 PMAQI
1st Jul 20252710 PMAQI
1st Jul 20252811 PMAQI
2nd Jul 20253212 AMAQI
2nd Jul 2025341 AMAQI
2nd Jul 2025352 AMAQI
2nd Jul 2025363 AMAQI
2nd Jul 2025364 AMAQI
27°C22/34°C
2nd Jul 2025375 AMAQI
2nd Jul 2025426 AMAQI
2nd Jul 2025437 AMAQI
2nd Jul 2025438 AMAQI
2nd Jul 2025439 AMAQI
2nd Jul 20254310 AMAQI
2nd Jul 20254311 AMAQI
2nd Jul 20254512 PMAQI
2nd Jul 2025461 PMAQI
2nd Jul 2025462 PMAQI
2nd Jul 2025473 PMAQI
2nd Jul 2025474 PMAQI
2nd Jul 2025475 PMAQI
2nd Jul 2025476 PMAQI
2nd Jul 2025457 PMAQI
2nd Jul 2025448 PMAQI
2nd Jul 2025469 PMAQI
2nd Jul 20254610 PMAQI
2nd Jul 20254611 PMAQI
3rd Jul 20254612 AMAQI
3rd Jul 2025461 AMAQI
3rd Jul 2025462 AMAQI
3rd Jul 2025463 AMAQI
3rd Jul 2025534 AMAQI
28°C21/34°C
3rd Jul 2025535 AMAQI
3rd Jul 2025536 AMAQI
3rd Jul 2025547 AMAQI
3rd Jul 2025548 AMAQI
3rd Jul 2025549 AMAQI
3rd Jul 20255310 AMAQI
3rd Jul 20255411 AMAQI
3rd Jul 20255212 PMAQI
3rd Jul 2025521 PMAQI
3rd Jul 2025522 PMAQI
3rd Jul 2025533 PMAQI
3rd Jul 2025534 PMAQI
3rd Jul 2025535 PMAQI
3rd Jul 2025546 PMAQI
3rd Jul 2025537 PMAQI
3rd Jul 2025538 PMAQI
3rd Jul 2025539 PMAQI
3rd Jul 20255410 PMAQI
3rd Jul 20255411 PMAQI
4th Jul 20255512 AMAQI
4th Jul 2025581 AMAQI
4th Jul 2025662 AMAQI
4th Jul 2025653 AMAQI
4th Jul 2025644 AMAQI
30°C24/35°C
4th Jul 2025635 AMAQI
4th Jul 2025656 AMAQI
4th Jul 2025647 AMAQI
4th Jul 2025658 AMAQI
4th Jul 2025639 AMAQI
4th Jul 20256110 AMAQI
4th Jul 20255811 AMAQI
4th Jul 20255812 PMAQI
4th Jul 2025581 PMAQI
4th Jul 2025582 PMAQI
4th Jul 2025603 PMAQI
4th Jul 2025604 PMAQI
4th Jul 2025595 PMAQI
4th Jul 2025596 PMAQI
4th Jul 2025607 PMAQI
4th Jul 2025598 PMAQI
4th Jul 2025589 PMAQI
4th Jul 20256010 PMAQI
4th Jul 20257611 PMAQI
5th Jul 20259012 AMAQI
5th Jul 2025821 AMAQI
5th Jul 20251152 AMAQI
5th Jul 20251123 AMAQI
5th Jul 20251034 AMAQI
30°C24/37°C
5th Jul 20251135 AMAQI
5th Jul 2025996 AMAQI
5th Jul 2025937 AMAQI
5th Jul 2025868 AMAQI
5th Jul 2025809 AMAQI
5th Jul 20257810 AMAQI
5th Jul 20257311 AMAQI
5th Jul 20256912 PMAQI
5th Jul 2025681 PMAQI
5th Jul 2025712 PMAQI
5th Jul 2025723 PMAQI
5th Jul 2025714 PMAQI
5th Jul 2025715 PMAQI
5th Jul 2025716 PMAQI
5th Jul 2025747 PMAQI
5th Jul 2025788 PMAQI
5th Jul 2025729 PMAQI
5th Jul 20257310 PMAQI
5th Jul 20257211 PMAQI
6th Jul 20257512 AMAQI
6th Jul 2025721 AMAQI
6th Jul 2025652 AMAQI
6th Jul 2025643 AMAQI
6th Jul 2025624 AMAQI
31°C24/38°C
6th Jul 2025575 AMAQI
6th Jul 2025596 AMAQI
6th Jul 2025587 AMAQI
6th Jul 2025598 AMAQI
6th Jul 2025619 AMAQI
6th Jul 20256110 AMAQI
6th Jul 20256111 AMAQI
6th Jul 20256412 PMAQI
6th Jul 2025621 PMAQI
6th Jul 2025602 PMAQI
6th Jul 2025603 PMAQI
6th Jul 2025584 PMAQI
6th Jul 2025565 PMAQI
6th Jul 2025556 PMAQI
6th Jul 2025607 PMAQI
6th Jul 2025608 PMAQI
6th Jul 2025559 PMAQI
6th Jul 20255410 PMAQI
6th Jul 20255411 PMAQI
7th Jul 20255412 AMAQI
7th Jul 2025491 AMAQI
7th Jul 2025292 AMAQI
7th Jul 2025293 AMAQI
7th Jul 2025304 AMAQI
29°C26/34°C
7th Jul 2025255 AMAQI
7th Jul 2025266 AMAQI
7th Jul 2025287 AMAQI
7th Jul 2025338 AMAQI
7th Jul 2025409 AMAQI
7th Jul 20253810 AMAQI
7th Jul 20253711 AMAQI
7th Jul 20253412 PMAQI
7th Jul 2025351 PMAQI
7th Jul 2025402 PMAQI
7th Jul 2025403 PMAQI
7th Jul 2025424 PMAQI
7th Jul 2025445 PMAQI
7th Jul 2025446 PMAQI
7th Jul 2025387 PMAQI
7th Jul 2025388 PMAQI
7th Jul 2025439 PMAQI
7th Jul 20254410 PMAQI
7th Jul 20254411 PMAQI
8th Jul 20254612 AMAQI
8th Jul 2025491 AMAQI
8th Jul 2025522 AMAQI
8th Jul 2025513 AMAQI
8th Jul 2025514 AMAQI
28°C23/33°C
8th Jul 2025495 AMAQI
8th Jul 2025526 AMAQI
8th Jul 2025547 AMAQI
8th Jul 2025558 AMAQI
8th Jul 2025549 AMAQI
8th Jul 20255310 AMAQI
8th Jul 20255011 AMAQI
8th Jul 20255012 PMAQI
8th Jul 2025491 PMAQI
8th Jul 2025482 PMAQI
8th Jul 2025513 PMAQI
8th Jul 2025544 PMAQI
8th Jul 2025495 PMAQI
8th Jul 2025466 PMAQI
8th Jul 2025497 PMAQI
8th Jul 2025508 PMAQI
8th Jul 2025449 PMAQI
8th Jul 20254310 PMAQI
8th Jul 20254411 PMAQI
9th Jul 20254412 AMAQI
9th Jul 2025431 AMAQI
9th Jul 2025322 AMAQI
9th Jul 2025323 AMAQI
9th Jul 2025324 AMAQI
27°C23/36°C
9th Jul 2025275 AMAQI
9th Jul 2025276 AMAQI
9th Jul 2025307 AMAQI
9th Jul 2025308 AMAQI
9th Jul 2025349 AMAQI
9th Jul 20253810 AMAQI
9th Jul 20253511 AMAQI
9th Jul 20253412 PMAQI
9th Jul 2025341 PMAQI
9th Jul 2025402 PMAQI
9th Jul 2025373 PMAQI
9th Jul 2025374 PMAQI
9th Jul 2025365 PMAQI
9th Jul 2025356 PMAQI
9th Jul 2025347 PMAQI
9th Jul 2025348 PMAQI
9th Jul 2025339 PMAQI
9th Jul 20253110 PMAQI
9th Jul 20253311 PMAQI
10th Jul 20253512 AMAQI
10th Jul 2025381 AMAQI
10th Jul 2025382 AMAQI
10th Jul 2025383 AMAQI
10th Jul 2025374 AMAQI
27°C22/35°C
10th Jul 2025405 AMAQI
10th Jul 2025396 AMAQI
10th Jul 2025427 AMAQI
10th Jul 2025488 AMAQI
10th Jul 2025489 AMAQI
10th Jul 20254410 AMAQI
10th Jul 20253911 AMAQI
10th Jul 20253512 PMAQI
10th Jul 2025391 PMAQI
10th Jul 2025402 PMAQI
10th Jul 2025403 PMAQI
10th Jul 2025404 PMAQI
10th Jul 2025385 PMAQI
10th Jul 2025356 PMAQI
10th Jul 2025387 PMAQI
10th Jul 2025398 PMAQI
10th Jul 2025369 PMAQI
10th Jul 20253710 PMAQI
10th Jul 20254011 PMAQI
11th Jul 20254212 AMAQI
11th Jul 2025421 AMAQI
11th Jul 2025362 AMAQI
11th Jul 2025363 AMAQI
11th Jul 2025374 AMAQI
30°C23/37°C
11th Jul 2025415 AMAQI
11th Jul 2025426 AMAQI
11th Jul 2025387 AMAQI
11th Jul 2025418 AMAQI
11th Jul 2025429 AMAQI
11th Jul 20254310 AMAQI
11th Jul 20254711 AMAQI
11th Jul 20255012 PMAQI
11th Jul 2025491 PMAQI
11th Jul 2025482 PMAQI
11th Jul 2025473 PMAQI
11th Jul 2025474 PMAQI
11th Jul 2025445 PMAQI
11th Jul 2025466 PMAQI
11th Jul 2025447 PMAQI
11th Jul 2025468 PMAQI
11th Jul 2025509 PMAQI
11th Jul 20254910 PMAQI
11th Jul 20254911 PMAQI
12th Jul 20254912 AMAQI
12th Jul 2025461 AMAQI
12th Jul 2025382 AMAQI
12th Jul 2025353 AMAQI
12th Jul 2025324 AMAQI
30°C23/37°C
12th Jul 2025275 AMAQI
12th Jul 2025246 AMAQI
12th Jul 2025287 AMAQI
12th Jul 2025268 AMAQI
12th Jul 2025289 AMAQI
12th Jul 20253010 AMAQI
12th Jul 20253611 AMAQI
12th Jul 20253512 PMAQI
12th Jul 2025351 PMAQI
12th Jul 2025392 PMAQI
12th Jul 2025363 PMAQI
12th Jul 2025354 PMAQI
12th Jul 2025345 PMAQI
12th Jul 2025346 PMAQI
12th Jul 2025357 PMAQI
12th Jul 2025358 PMAQI
12th Jul 2025329 PMAQI
12th Jul 20253110 PMAQI
12th Jul 20253311 PMAQI
13th Jul 20253512 AMAQI
13th Jul 2025381 AMAQI
13th Jul 2025332 AMAQI
13th Jul 2025323 AMAQI
13th Jul 2025324 AMAQI
29°C25/34°C
13th Jul 2025365 AMAQI
13th Jul 2025376 AMAQI
13th Jul 2025357 AMAQI
13th Jul 2025368 AMAQI
13th Jul 2025369 AMAQI
13th Jul 20253310 AMAQI
13th Jul 20253411 AMAQI
13th Jul 20253612 PMAQI
13th Jul 2025381 PMAQI
13th Jul 2025362 PMAQI
13th Jul 2025373 PMAQI
13th Jul 2025374 PMAQI
13th Jul 2025355 PMAQI
13th Jul 2025346 PMAQI
13th Jul 2025367 PMAQI
13th Jul 2025358 PMAQI
13th Jul 2025319 PMAQI
13th Jul 20253110 PMAQI
13th Jul 20253111 PMAQI
14th Jul 20253012 AMAQI
14th Jul 2025301 AMAQI
14th Jul 2025232 AMAQI
14th Jul 2025213 AMAQI
14th Jul 2025224 AMAQI
26°C23/30°C
14th Jul 2025205 AMAQI
14th Jul 2025256 AMAQI
14th Jul 2025337 AMAQI
14th Jul 2025358 AMAQI
14th Jul 2025349 AMAQI
14th Jul 20253810 AMAQI
14th Jul 20253811 AMAQI
14th Jul 20253712 PMAQI
14th Jul 2025361 PMAQI
14th Jul 2025352 PMAQI
14th Jul 2025373 PMAQI
14th Jul 2025384 PMAQI
14th Jul 2025385 PMAQI
14th Jul 2025386 PMAQI
14th Jul 2025347 PMAQI
14th Jul 2025348 PMAQI
14th Jul 2025379 PMAQI
14th Jul 20253610 PMAQI
14th Jul 20253711 PMAQI
15th Jul 20253912 AMAQI
15th Jul 2025401 AMAQI
15th Jul 2025412 AMAQI
15th Jul 2025403 AMAQI
15th Jul 2025414 AMAQI
27°C23/34°C
15th Jul 2025465 AMAQI
15th Jul 2025456 AMAQI
15th Jul 2025437 AMAQI
15th Jul 2025418 AMAQI
15th Jul 2025389 AMAQI
15th Jul 20253910 AMAQI
15th Jul 20254011 AMAQI
15th Jul 20254212 PMAQI
15th Jul 2025401 PMAQI
15th Jul 2025382 PMAQI
15th Jul 2025383 PMAQI
15th Jul 2025384 PMAQI
15th Jul 2025405 PMAQI
15th Jul 2025386 PMAQI
15th Jul 2025397 PMAQI
15th Jul 2025418 PMAQI
15th Jul 2025379 PMAQI
15th Jul 20253710 PMAQI
15th Jul 20253611 PMAQI
16th Jul 20253712 AMAQI
16th Jul 2025351 AMAQI
16th Jul 2025312 AMAQI
16th Jul 2025313 AMAQI
16th Jul 2025304 AMAQI
28°C24/33°C
16th Jul 2025265 AMAQI
16th Jul 2025266 AMAQI
16th Jul 2025297 AMAQI
16th Jul 2025288 AMAQI
16th Jul 2025339 AMAQI
16th Jul 20253710 AMAQI
16th Jul 20254311 AMAQI
16th Jul 20254712 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025442 PMAQI
16th Jul 2025443 PMAQI
16th Jul 2025424 PMAQI
16th Jul 2025395 PMAQI
16th Jul 2025356 PMAQI
16th Jul 2025347 PMAQI
16th Jul 2025348 PMAQI
16th Jul 2025339 PMAQI
16th Jul 20253410 PMAQI
16th Jul 20253511 PMAQI
17th Jul 20253312 AMAQI
17th Jul 2025351 AMAQI
17th Jul 2025432 AMAQI
17th Jul 2025453 AMAQI
17th Jul 2025394 AMAQI
30°C23/39°C
17th Jul 2025295 AMAQI
17th Jul 2025316 AMAQI
17th Jul 2025317 AMAQI
17th Jul 2025288 AMAQI
17th Jul 2025299 AMAQI
17th Jul 20253510 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20253612 PMAQI
17th Jul 2025431 PMAQI
17th Jul 2025502 PMAQI
17th Jul 2025453 PMAQI
17th Jul 2025424 PMAQI
17th Jul 2025375 PMAQI
17th Jul 2025356 PMAQI
17th Jul 2025357 PMAQI
17th Jul 2025348 PMAQI
17th Jul 2025339 PMAQI
17th Jul 20253510 PMAQI
17th Jul 20253211 PMAQI
18th Jul 20253212 AMAQI
18th Jul 2025291 AMAQI
18th Jul 2025242 AMAQI
18th Jul 2025253 AMAQI
18th Jul 2025244 AMAQI
28°C24/34°C
18th Jul 2025205 AMAQI
18th Jul 2025256 AMAQI
18th Jul 2025257 AMAQI
18th Jul 2025268 AMAQI
18th Jul 2025289 AMAQI
18th Jul 20252710 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252512 PMAQI
18th Jul 2025311 PMAQI
18th Jul 2025332 PMAQI
18th Jul 2025353 PMAQI
18th Jul 2025354 PMAQI
18th Jul 2025375 PMAQI
18th Jul 2025376 PMAQI
18th Jul 2025307 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025379 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20254311 PMAQI
19th Jul 20254812 AMAQI
19th Jul 2025501 AMAQI
19th Jul 2025572 AMAQI
19th Jul 2025563 AMAQI
19th Jul 2025544 AMAQI
27°C24/35°C
19th Jul 2025445 AMAQI
19th Jul 2025406 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025408 AMAQI
19th Jul 2025429 AMAQI
19th Jul 20254010 AMAQI
19th Jul 20254311 AMAQI
19th Jul 20255012 PMAQI
19th Jul 2025511 PMAQI
19th Jul 2025522 PMAQI
19th Jul 2025543 PMAQI
19th Jul 2025494 PMAQI
19th Jul 2025445 PMAQI
19th Jul 2025456 PMAQI
19th Jul 2025507 PMAQI
19th Jul 2025508 PMAQI
19th Jul 2025529 PMAQI
19th Jul 20255110 PMAQI
19th Jul 20255011 PMAQI
20th Jul 20255112 AMAQI
20th Jul 2025531 AMAQI
20th Jul 2025562 AMAQI
20th Jul 2025563 AMAQI
20th Jul 2025544 AMAQI
29°C24/36°C
20th Jul 2025545 AMAQI
20th Jul 2025536 AMAQI
20th Jul 2025537 AMAQI
20th Jul 2025538 AMAQI
20th Jul 2025549 AMAQI
20th Jul 20255410 AMAQI
20th Jul 20255511 AMAQI
20th Jul 20255312 PMAQI
20th Jul 2025541 PMAQI
20th Jul 2025532 PMAQI
20th Jul 2025543 PMAQI
20th Jul 2025534 PMAQI
20th Jul 2025535 PMAQI
20th Jul 2025516 PMAQI
20th Jul 2025537 PMAQI
20th Jul 2025538 PMAQI
20th Jul 2025509 PMAQI
20th Jul 20255010 PMAQI
20th Jul 20255011 PMAQI
21st Jul 20254912 AMAQI
21st Jul 2025461 AMAQI
21st Jul 2025382 AMAQI
21st Jul 2025383 AMAQI
21st Jul 2025364 AMAQI
32°C26/39°C
21st Jul 2025215 AMAQI
21st Jul 2025186 AMAQI
21st Jul 2025217 AMAQI
21st Jul 2025228 AMAQI
21st Jul 2025239 AMAQI
21st Jul 20252410 AMAQI
21st Jul 20252711 AMAQI
21st Jul 20252712 PMAQI
21st Jul 2025271 PMAQI
21st Jul 2025322 PMAQI
21st Jul 2025313 PMAQI
21st Jul 2025334 PMAQI
21st Jul 2025355 PMAQI
21st Jul 2025326 PMAQI
21st Jul 2025317 PMAQI
21st Jul 2025338 PMAQI
21st Jul 2025379 PMAQI
21st Jul 20253610 PMAQI
21st Jul 20253511 PMAQI
22nd Jul 20253512 AMAQI
22nd Jul 2025361 AMAQI
22nd Jul 2025322 AMAQI
22nd Jul 2025323 AMAQI
22nd Jul 2025324 AMAQI
26°C23/31°C
22nd Jul 2025405 AMAQI
22nd Jul 2025506 AMAQI
22nd Jul 2025477 AMAQI
22nd Jul 2025458 AMAQI
22nd Jul 2025449 AMAQI
22nd Jul 20254710 AMAQI
22nd Jul 20254711 AMAQI
22nd Jul 20254712 PMAQI
22nd Jul 2025451 PMAQI
22nd Jul 2025502 PMAQI
22nd Jul 2025523 PMAQI
22nd Jul 2025534 PMAQI
22nd Jul 2025545 PMAQI
22nd Jul 2025546 PMAQI
22nd Jul 2025497 PMAQI
22nd Jul 2025488 PMAQI
22nd Jul 2025499 PMAQI
22nd Jul 20255210 PMAQI
22nd Jul 20254811 PMAQI
23rd Jul 20254912 AMAQI
23rd Jul 2025511 AMAQI
23rd Jul 2025512 AMAQI
23rd Jul 2025513 AMAQI
23rd Jul 2025524 AMAQI
29°C24/36°C
23rd Jul 2025525 AMAQI
23rd Jul 2025556 AMAQI
23rd Jul 2025537 AMAQI
23rd Jul 2025548 AMAQI
23rd Jul 2025589 AMAQI
23rd Jul 20255910 AMAQI
23rd Jul 20255811 AMAQI
23rd Jul 20256012 PMAQI
23rd Jul 2025611 PMAQI
23rd Jul 2025602 PMAQI
23rd Jul 2025583 PMAQI
23rd Jul 2025584 PMAQI
23rd Jul 2025585 PMAQI
23rd Jul 2025576 PMAQI
23rd Jul 2025577 PMAQI
23rd Jul 2025568 PMAQI
23rd Jul 2025579 PMAQI
23rd Jul 20255610 PMAQI
23rd Jul 20255711 PMAQI
24th Jul 20255712 AMAQI
24th Jul 2025581 AMAQI
24th Jul 2025592 AMAQI
24th Jul 2025583 AMAQI
24th Jul 2025594 AMAQI
31°C26/39°C
24th Jul 2025585 AMAQI
24th Jul 2025576 AMAQI
24th Jul 2025597 AMAQI
24th Jul 2025588 AMAQI
24th Jul 2025589 AMAQI
24th Jul 20255810 AMAQI
24th Jul 20255711 AMAQI
24th Jul 20255612 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025552 PMAQI
24th Jul 2025563 PMAQI
24th Jul 2025564 PMAQI
24th Jul 2025595 PMAQI
24th Jul 2025566 PMAQI
24th Jul 2025587 PMAQI
24th Jul 2025578 PMAQI
24th Jul 2025549 PMAQI
24th Jul 20255510 PMAQI
24th Jul 20255511 PMAQI
25th Jul 20255512 AMAQI
25th Jul 2025511 AMAQI
25th Jul 2025382 AMAQI
25th Jul 2025373 AMAQI
25th Jul 2025404 AMAQI
31°C25/37°C
25th Jul 2025345 AMAQI
25th Jul 2025336 AMAQI
25th Jul 2025317 AMAQI
25th Jul 2025308 AMAQI
25th Jul 2025339 AMAQI
25th Jul 20253610 AMAQI
25th Jul 20254511 AMAQI
25th Jul 20255012 PMAQI
25th Jul 2025511 PMAQI
25th Jul 2025522 PMAQI
25th Jul 2025503 PMAQI
25th Jul 2025524 PMAQI
25th Jul 2025515 PMAQI
25th Jul 2025496 PMAQI
25th Jul 2025497 PMAQI
25th Jul 2025498 PMAQI
25th Jul 2025499 PMAQI
25th Jul 20254910 PMAQI
25th Jul 20254811 PMAQI
26th Jul 20254912 AMAQI
26th Jul 2025511 AMAQI
26th Jul 2025502 AMAQI
26th Jul 2025493 AMAQI
26th Jul 2025504 AMAQI
31°C25/36°C
26th Jul 2025465 AMAQI
26th Jul 2025456 AMAQI
26th Jul 2025487 AMAQI
26th Jul 2025478 AMAQI
26th Jul 2025489 AMAQI
26th Jul 20254410 AMAQI
26th Jul 20254411 AMAQI
26th Jul 20254412 PMAQI
26th Jul 2025421 PMAQI
26th Jul 2025422 PMAQI
26th Jul 2025413 PMAQI
26th Jul 2025414 PMAQI
26th Jul 2025405 PMAQI
26th Jul 2025416 PMAQI
26th Jul 2025447 PMAQI
26th Jul 2025478 PMAQI
26th Jul 2025399 PMAQI
26th Jul 20253910 PMAQI
26th Jul 20253811 PMAQI
27th Jul 20254012 AMAQI
27th Jul 2025381 AMAQI
27th Jul 2025302 AMAQI
27th Jul 2025293 AMAQI
27th Jul 2025274 AMAQI
31°C26/37°C
27th Jul 2025185 AMAQI
27th Jul 2025186 AMAQI
27th Jul 2025197 AMAQI
27th Jul 2025208 AMAQI
27th Jul 2025199 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252211 AMAQI
27th Jul 20252212 PMAQI
27th Jul 2025241 PMAQI
27th Jul 2025252 PMAQI
27th Jul 2025293 PMAQI
27th Jul 2025314 PMAQI
27th Jul 2025315 PMAQI
27th Jul 2025326 PMAQI
27th Jul 2025297 PMAQI
27th Jul 2025298 PMAQI
27th Jul 2025319 PMAQI
27th Jul 20253110 PMAQI
27th Jul 20253111 PMAQI
28th Jul 20253012 AMAQI
28th Jul 2025271 AMAQI
28th Jul 2025252 AMAQI
28th Jul 2025243 AMAQI
28th Jul 2025264 AMAQI
31°C26/36°C
28th Jul 2025325 AMAQI
28th Jul 2025346 AMAQI
28th Jul 2025297 AMAQI
28th Jul 2025308 AMAQI
28th Jul 2025359 AMAQI
28th Jul 20253910 AMAQI
28th Jul 20254111 AMAQI
28th Jul 20254112 PMAQI
28th Jul 2025401 PMAQI
28th Jul 2025392 PMAQI
28th Jul 2025413 PMAQI
28th Jul 2025424 PMAQI
28th Jul 2025405 PMAQI
28th Jul 2025416 PMAQI
28th Jul 2025367 PMAQI
28th Jul 2025368 PMAQI
28th Jul 2025379 PMAQI
28th Jul 20254010 PMAQI
28th Jul 20254311 PMAQI
29th Jul 20254512 AMAQI
29th Jul 2025451 AMAQI
29th Jul 2025512 AMAQI
29th Jul 2025513 AMAQI
29th Jul 2025514 AMAQI
32°C28/38°C
29th Jul 2025535 AMAQI
29th Jul 2025516 AMAQI
29th Jul 2025527 AMAQI
29th Jul 2025548 AMAQI
29th Jul 2025549 AMAQI
29th Jul 20255010 AMAQI
29th Jul 20254611 AMAQI
29th Jul 20254412 PMAQI
29th Jul 2025441 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025483 PMAQI
29th Jul 2025474 PMAQI
29th Jul 2025465 PMAQI
29th Jul 2025466 PMAQI
29th Jul 2025487 PMAQI
29th Jul 2025498 PMAQI
29th Jul 2025459 PMAQI
29th Jul 20254510 PMAQI
29th Jul 20254711 PMAQI
30th Jul 20254812 AMAQI
30th Jul 2025481 AMAQI
30th Jul 2025442 AMAQI
30th Jul 2025433 AMAQI
30th Jul 2025444 AMAQI
33°C27/40°C
30th Jul 2025485 AMAQI
30th Jul 2025456 AMAQI
30th Jul 2025477 AMAQI
30th Jul 2025528 AMAQI
30th Jul 2025559 AMAQI
30th Jul 20255110 AMAQI
30th Jul 20255011 AMAQI
30th Jul 20254812 PMAQI
30th Jul 2025481 PMAQI
30th Jul 2025432 PMAQI
30th Jul 2025433 PMAQI
30th Jul 2025434 PMAQI
30th Jul 2025435 PMAQI
30th Jul 2025436 PMAQI
30th Jul 2025437 PMAQI
30th Jul 2025438 PMAQI
30th Jul 2025429 PMAQI
30th Jul 20254110 PMAQI
30th Jul 20254111 PMAQI
31st Jul 20254112 AMAQI
31st Jul 2025391 AMAQI
31st Jul 2025302 AMAQI
31st Jul 2025313 AMAQI
31st Jul 2025304 AMAQI
31°C24/36°C
31st Jul 2025215 AMAQI
5 AM31st Jul 2025226 AMAQI
31st Jul 2025297 AMAQI
31st Jul 2025308 AMAQI
31st Jul 2025319 AMAQI
31st Jul 20253410 AMAQI
31st Jul 20253711 AMAQI
31st Jul 20253512 PMAQI
12 PM31st Jul 2025381 PMAQI
31st Jul 2025402 PMAQI
31st Jul 2025423 PMAQI
31st Jul 2025444 PMAQI
31st Jul 2025405 PMAQI
31st Jul 2025406 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
43AQI
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. 43), while the lowest AQI was between 5 AM to 8 PM (Avg. 43).
Night time
Avg. Highest Time
12 AM - 11 PM
44AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
44AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 44), while the lowest AQI was between 12 AM to 11 PM (Avg. 44).
2025 Days Vs Air Quality
St. Louis, Missouri, United States
2025
87%
184
12%
26
0.4%
1
Total number of days with different AQI categories in last 212 days in 2025 (153 days remaining)
Good
184 DaysModerate
26 DaysPoor
0 DaysUnhealthy
1 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 212 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
St. Louis, 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 January 2025
23AQI
23AQI
2nd January 2025
38AQI
38AQI
3rd January 2025
27AQI
27AQI
4th January 2025
22AQI
22AQI
5th January 2025
22AQI
22AQI
6th January 2025
19AQI
19AQI
7th January 2025
29AQI
29AQI
8th January 2025
48AQI
48AQI
9th January 2025
56AQI
56AQI
10th January 2025
56AQI
56AQI
11th January 2025
37AQI
37AQI
12th January 2025
31AQI
31AQI
13th January 2025
24AQI
24AQI
14th January 2025
29AQI
29AQI
15th January 2025
41AQI
41AQI
16th January 2025
36AQI
36AQI
17th January 2025
39AQI
39AQI
18th January 2025
21AQI
21AQI
19th January 2025
19AQI
19AQI
20th January 2025
22AQI
22AQI
21st January 2025
24AQI
24AQI
22nd January 2025
39AQI
39AQI
23rd January 2025
31AQI
31AQI
24th January 2025
35AQI
35AQI
25th January 2025
41AQI
41AQI
26th January 2025
30AQI
30AQI
27th January 2025
27AQI
27AQI
28th January 2025
24AQI
24AQI
29th January 2025
30AQI
30AQI
30th January 2025
42AQI
42AQI
31st January 2025
21AQI
21AQI
1st February 2025
35AQI
35AQI
2nd February 2025
29AQI
29AQI
3rd February 2025
42AQI
42AQI
4th February 2025
29AQI
29AQI
5th February 2025
28AQI
28AQI
6th February 2025
27AQI
27AQI
7th February 2025
33AQI
33AQI
8th February 2025
28AQI
28AQI
9th February 2025
29AQI
29AQI
10th February 2025
29AQI
29AQI
11th February 2025
35AQI
35AQI
12th February 2025
52AQI
52AQI
13th February 2025
30AQI
30AQI
14th February 2025
34AQI
34AQI
15th February 2025
31AQI
31AQI
16th February 2025
32AQI
32AQI
17th February 2025
21AQI
21AQI
18th February 2025
22AQI
22AQI
19th February 2025
22AQI
22AQI
20th February 2025
25AQI
25AQI
21st February 2025
43AQI
43AQI
22nd February 2025
46AQI
46AQI
23rd February 2025
41AQI
41AQI
24th February 2025
41AQI
41AQI
25th February 2025
35AQI
35AQI
26th February 2025
33AQI
33AQI
27th February 2025
27AQI
27AQI
28th February 2025
27AQI
27AQI
1st March 2025
26AQI
26AQI
2nd March 2025
30AQI
30AQI
3rd March 2025
36AQI
36AQI
4th March 2025
45AQI
45AQI
5th March 2025
23AQI
23AQI
6th March 2025
27AQI
27AQI
7th March 2025
32AQI
32AQI
8th March 2025
32AQI
32AQI
9th March 2025
47AQI
47AQI
10th March 2025
44AQI
44AQI
11th March 2025
55AQI
55AQI
12th March 2025
54AQI
54AQI
13th March 2025
67AQI
67AQI
14th March 2025
59AQI
59AQI
15th March 2025
182AQI
182AQI
16th March 2025
21AQI
21AQI
17th March 2025
37AQI
37AQI
18th March 2025
38AQI
38AQI
19th March 2025
38AQI
38AQI
20th March 2025
19AQI
19AQI
21st March 2025
37AQI
37AQI
22nd March 2025
21AQI
21AQI
23rd March 2025
23AQI
23AQI
24th March 2025
19AQI
19AQI
25th March 2025
27AQI
27AQI
26th March 2025
36AQI
36AQI
27th March 2025
50AQI
50AQI
28th March 2025
35AQI
35AQI
29th March 2025
36AQI
36AQI
30th March 2025
26AQI
26AQI
31st March 2025
18AQI
18AQI
1st April 2025
32AQI
32AQI
2nd April 2025
36AQI
36AQI
3rd April 2025
28AQI
28AQI
4th April 2025
28AQI
28AQI
5th April 2025
25AQI
25AQI
6th April 2025
19AQI
19AQI
7th April 2025
29AQI
29AQI
8th April 2025
20AQI
20AQI
9th April 2025
31AQI
31AQI
10th April 2025
41AQI
41AQI
11th April 2025
38AQI
38AQI
12th April 2025
51AQI
51AQI
13th April 2025
40AQI
40AQI
14th April 2025
38AQI
38AQI
15th April 2025
22AQI
22AQI
16th April 2025
36AQI
36AQI
17th April 2025
48AQI
48AQI
18th April 2025
50AQI
50AQI
19th April 2025
45AQI
45AQI
20th April 2025
48AQI
48AQI
21st April 2025
22AQI
22AQI
22nd April 2025
37AQI
37AQI
23rd April 2025
41AQI
41AQI
24th April 2025
48AQI
48AQI
25th April 2025
34AQI
34AQI
26th April 2025
23AQI
23AQI
27th April 2025
23AQI
23AQI
28th April 2025
35AQI
35AQI
29th April 2025
32AQI
32AQI
30th April 2025
31AQI
31AQI
1st May 2025
24AQI
24AQI
2nd May 2025
25AQI
25AQI
3rd May 2025
22AQI
22AQI
4th May 2025
18AQI
18AQI
5th May 2025
19AQI
19AQI
6th May 2025
36AQI
36AQI
7th May 2025
33AQI
33AQI
8th May 2025
34AQI
34AQI
9th May 2025
28AQI
28AQI
10th May 2025
39AQI
39AQI
11th May 2025
34AQI
34AQI
12th May 2025
39AQI
39AQI
13th May 2025
30AQI
30AQI
14th May 2025
39AQI
39AQI
15th May 2025
56AQI
56AQI
16th May 2025
43AQI
43AQI
17th May 2025
30AQI
30AQI
18th May 2025
27AQI
27AQI
19th May 2025
34AQI
34AQI
20th May 2025
26AQI
26AQI
21st May 2025
17AQI
17AQI
22nd May 2025
17AQI
17AQI
23rd May 2025
21AQI
21AQI
24th May 2025
35AQI
35AQI
25th May 2025
36AQI
36AQI
26th May 2025
22AQI
22AQI
27th May 2025
30AQI
30AQI
28th May 2025
26AQI
26AQI
29th May 2025
47AQI
47AQI
30th May 2025
29AQI
29AQI
31st May 2025
40AQI
40AQI
1st June 2025
40AQI
40AQI
2nd June 2025
46AQI
46AQI
3rd June 2025
62AQI
62AQI
4th June 2025
49AQI
49AQI
5th June 2025
42AQI
42AQI
6th June 2025
52AQI
52AQI
7th June 2025
73AQI
73AQI
8th June 2025
50AQI
50AQI
9th June 2025
54AQI
54AQI
10th June 2025
59AQI
59AQI
11th June 2025
72AQI
72AQI
12th June 2025
73AQI
73AQI
13th June 2025
45AQI
45AQI
14th June 2025
34AQI
34AQI
15th June 2025
43AQI
43AQI
16th June 2025
32AQI
32AQI
17th June 2025
36AQI
36AQI
18th June 2025
34AQI
34AQI
19th June 2025
25AQI
25AQI
20th June 2025
40AQI
40AQI
21st June 2025
49AQI
49AQI
22nd June 2025
52AQI
52AQI
23rd June 2025
57AQI
57AQI
24th June 2025
53AQI
53AQI
25th June 2025
48AQI
48AQI
26th June 2025
48AQI
48AQI
27th June 2025
35AQI
35AQI
28th June 2025
27AQI
27AQI
29th June 2025
23AQI
23AQI
30th June 2025
26AQI
26AQI
1st July 2025
27AQI
27AQI
2nd July 2025
42AQI
42AQI
3rd July 2025
52AQI
52AQI
4th July 2025
61AQI
61AQI
5th July 2025
85AQI
85AQI
6th July 2025
61AQI
61AQI
7th July 2025
38AQI
38AQI
8th July 2025
50AQI
50AQI
9th July 2025
34AQI
34AQI
10th July 2025
39AQI
39AQI
11th July 2025
44AQI
44AQI
12th July 2025
34AQI
34AQI
13th July 2025
34AQI
34AQI
14th July 2025
32AQI
32AQI
15th July 2025
40AQI
40AQI
16th July 2025
35AQI
35AQI
17th July 2025
37AQI
37AQI
18th July 2025
30AQI
30AQI
19th July 2025
49AQI
49AQI
20th July 2025
53AQI
53AQI
21st July 2025
32AQI
32AQI
22nd July 2025
44AQI
44AQI
23rd July 2025
55AQI
55AQI
24th July 2025
57AQI
57AQI
25th July 2025
44AQI
44AQI
26th July 2025
45AQI
45AQI
27th July 2025
27AQI
27AQI
28th July 2025
35AQI
35AQI
29th July 2025
48AQI
48AQI
30th July 2025
46AQI
46AQI
32AQI
32AQI
40AQI
34AQI
31AQI
46AQI
44AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202537AQI
29
2
27
1
26
4
1
29
1
30
1
20
10
23
7
184
26
1
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
May31AQI
202438AQI
28
3
19
10
26
5
27
3
29
2
24
6
25
6
22
9
24
6
19
12
30
29
2
302
64
Highest AQI recorded in
October46AQI
Lowest AQI recorded in
November28AQI
202342AQI
28
3
25
3
28
3
23
7
18
13
6
24
24
7
22
9
20
10
25
6
23
6
28
3
270
94
Highest AQI recorded in
June63AQI
Lowest AQI recorded in
December34AQI
202238AQI
28
3
18
4
27
4
28
2
26
5
23
6
1
16
7
2
26
4
26
5
23
7
25
6
268
53
1
Highest AQI recorded in
June48AQI
Lowest AQI recorded in
April31AQI
202139AQI
27
3
23
5
26
5
27
3
30
1
25
5
18
12
1
20
11
25
5
28
3
22
8
24
7
295
68
1
Highest AQI recorded in
July51AQI
Lowest AQI recorded in
May34AQI
202039AQI
13
20
1
19
25
5
25
5
1
28
3
22
8
27
4
26
4
17
14
222
44
1
Highest AQI recorded in
December46AQI
Lowest AQI recorded in
May30AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
42AQILeast Polluted Year Recorded
2025(Avg.)
37AQISt. Louis's annual 2025 AQI (37) shows an average percentage change of -5.9% (improved AQI) compared to previous years: 2020 (39), 2021 (39), 2022 (38), 2023 (42), 2024 (38).
