Chicago, Illinois, 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
Chicago, Illinois, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2025
93AQILowest AQI recorded on
12th Aug 2025
43AQISame Day Analysis (12th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 43 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Chicago, Illinois, United States
AQI
Day
Night
.
5 AM12th Aug 2025
8 PM
4 AM13th Aug 2025
Day time
Avg. Highest Time
3PM12th Aug
52AQI
Avg. Lowest Time
6PM12th Aug
38AQI
Night time
Avg. Highest Time
8PM12th Aug
38AQI
Avg. Lowest Time
3AM13th Aug
32AQI
In the last 24 hours,
Chicago's AQI reached its highest point of 52 at 3 PM during the Day, while the lowest point, 32, was recorded at 3 AM during the Night between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Chicago, Illinois, United States
JulAug
14th - 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 - 11th11th - 12th12th - 13th13th
Day
Night
14th Jul 2025665 AMAQI
14th Jul 2025706 AMAQI
14th Jul 2025747 AMAQI
14th Jul 2025748 AMAQI
14th Jul 2025799 AMAQI
14th Jul 20257810 AMAQI
14th Jul 20257611 AMAQI
14th Jul 20257512 PMAQI
14th Jul 2025781 PMAQI
14th Jul 2025812 PMAQI
14th Jul 2025823 PMAQI
14th Jul 2025784 PMAQI
14th Jul 2025775 PMAQI
14th Jul 2025796 PMAQI
14th Jul 2025727 PMAQI
14th Jul 2025728 PMAQI
14th Jul 2025749 PMAQI
14th Jul 20257210 PMAQI
14th Jul 20257511 PMAQI
15th Jul 20257512 AMAQI
15th Jul 2025781 AMAQI
15th Jul 2025832 AMAQI
15th Jul 2025853 AMAQI
15th Jul 2025804 AMAQI
25°C18/32°C
15th Jul 2025825 AMAQI
15th Jul 2025906 AMAQI
15th Jul 2025937 AMAQI
15th Jul 2025888 AMAQI
15th Jul 2025889 AMAQI
15th Jul 20258410 AMAQI
15th Jul 20258011 AMAQI
15th Jul 20257812 PMAQI
15th Jul 2025731 PMAQI
15th Jul 2025722 PMAQI
15th Jul 2025753 PMAQI
15th Jul 2025764 PMAQI
15th Jul 2025775 PMAQI
15th Jul 2025786 PMAQI
15th Jul 2025817 PMAQI
15th Jul 2025798 PMAQI
15th Jul 2025749 PMAQI
15th Jul 20257510 PMAQI
15th Jul 20257411 PMAQI
16th Jul 20256912 AMAQI
16th Jul 2025651 AMAQI
16th Jul 2025502 AMAQI
16th Jul 2025493 AMAQI
16th Jul 2025474 AMAQI
26°C20/32°C
16th Jul 2025465 AMAQI
16th Jul 2025466 AMAQI
16th Jul 2025497 AMAQI
16th Jul 2025528 AMAQI
16th Jul 2025519 AMAQI
16th Jul 20255210 AMAQI
16th Jul 20255211 AMAQI
16th Jul 20255112 PMAQI
16th Jul 2025501 PMAQI
16th Jul 2025502 PMAQI
16th Jul 2025533 PMAQI
16th Jul 2025524 PMAQI
16th Jul 2025535 PMAQI
16th Jul 2025496 PMAQI
16th Jul 2025517 PMAQI
16th Jul 2025518 PMAQI
16th Jul 2025479 PMAQI
16th Jul 20254810 PMAQI
16th Jul 20254511 PMAQI
17th Jul 20254312 AMAQI
17th Jul 2025351 AMAQI
17th Jul 2025282 AMAQI
17th Jul 2025273 AMAQI
17th Jul 2025264 AMAQI
28°C23/32°C
17th Jul 2025265 AMAQI
17th Jul 2025266 AMAQI
17th Jul 2025257 AMAQI
17th Jul 2025268 AMAQI
17th Jul 2025279 AMAQI
17th Jul 20252710 AMAQI
17th Jul 20252711 AMAQI
17th Jul 20252712 PMAQI
17th Jul 2025261 PMAQI
17th Jul 2025272 PMAQI
17th Jul 2025273 PMAQI
17th Jul 2025284 PMAQI
17th Jul 2025275 PMAQI
17th Jul 2025276 PMAQI
17th Jul 2025267 PMAQI
17th Jul 2025268 PMAQI
17th Jul 2025269 PMAQI
17th Jul 20252510 PMAQI
17th Jul 20252511 PMAQI
18th Jul 20252412 AMAQI
18th Jul 2025241 AMAQI
18th Jul 2025252 AMAQI
18th Jul 2025253 AMAQI
18th Jul 2025254 AMAQI
21°C19/22°C
18th Jul 2025245 AMAQI
18th Jul 2025236 AMAQI
18th Jul 2025237 AMAQI
18th Jul 2025238 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20252610 AMAQI
18th Jul 20252811 AMAQI
18th Jul 20253012 PMAQI
18th Jul 2025331 PMAQI
18th Jul 2025332 PMAQI
18th Jul 2025323 PMAQI
18th Jul 2025334 PMAQI
18th Jul 2025355 PMAQI
18th Jul 2025366 PMAQI
18th Jul 2025277 PMAQI
18th Jul 2025298 PMAQI
18th Jul 2025389 PMAQI
18th Jul 20253710 PMAQI
18th Jul 20253711 PMAQI
19th Jul 20253812 AMAQI
19th Jul 2025391 AMAQI
19th Jul 2025452 AMAQI
19th Jul 2025453 AMAQI
19th Jul 2025434 AMAQI
23°C18/28°C
19th Jul 2025375 AMAQI
19th Jul 2025356 AMAQI
19th Jul 2025357 AMAQI
19th Jul 2025368 AMAQI
19th Jul 2025369 AMAQI
19th Jul 20253310 AMAQI
19th Jul 20253311 AMAQI
19th Jul 20253412 PMAQI
19th Jul 2025391 PMAQI
19th Jul 2025402 PMAQI
19th Jul 2025393 PMAQI
19th Jul 2025364 PMAQI
19th Jul 2025365 PMAQI
19th Jul 2025356 PMAQI
19th Jul 2025367 PMAQI
19th Jul 2025388 PMAQI
19th Jul 2025349 PMAQI
19th Jul 20253310 PMAQI
19th Jul 20253211 PMAQI
20th Jul 20253212 AMAQI
20th Jul 2025321 AMAQI
20th Jul 2025272 AMAQI
20th Jul 2025273 AMAQI
20th Jul 2025264 AMAQI
25°C21/29°C
20th Jul 2025265 AMAQI
20th Jul 2025306 AMAQI
20th Jul 2025307 AMAQI
20th Jul 2025288 AMAQI
20th Jul 2025269 AMAQI
20th Jul 20252410 AMAQI
20th Jul 20252411 AMAQI
20th Jul 20252612 PMAQI
20th Jul 2025281 PMAQI
20th Jul 2025282 PMAQI
20th Jul 2025303 PMAQI
20th Jul 2025304 PMAQI
20th Jul 2025305 PMAQI
20th Jul 2025306 PMAQI
20th Jul 2025297 PMAQI
20th Jul 2025288 PMAQI
20th Jul 2025309 PMAQI
20th Jul 20253110 PMAQI
20th Jul 20253811 PMAQI
21st Jul 20254712 AMAQI
21st Jul 2025531 AMAQI
21st Jul 2025772 AMAQI
21st Jul 2025753 AMAQI
21st Jul 2025764 AMAQI
22°C21/22°C
21st Jul 2025765 AMAQI
21st Jul 2025786 AMAQI
21st Jul 2025797 AMAQI
21st Jul 2025718 AMAQI
21st Jul 2025609 AMAQI
21st Jul 20256110 AMAQI
21st Jul 20256111 AMAQI
21st Jul 20256212 PMAQI
21st Jul 2025621 PMAQI
21st Jul 2025662 PMAQI
21st Jul 2025673 PMAQI
21st Jul 2025684 PMAQI
21st Jul 2025695 PMAQI
21st Jul 2025686 PMAQI
21st Jul 2025697 PMAQI
21st Jul 2025718 PMAQI
21st Jul 2025709 PMAQI
21st Jul 20257010 PMAQI
21st Jul 20257211 PMAQI
22nd Jul 20256812 AMAQI
22nd Jul 2025721 AMAQI
22nd Jul 2025762 AMAQI
22nd Jul 2025783 AMAQI
22nd Jul 2025774 AMAQI
23°C19/27°C
22nd Jul 2025775 AMAQI
22nd Jul 2025776 AMAQI
22nd Jul 2025837 AMAQI
22nd Jul 2025828 AMAQI
22nd Jul 2025839 AMAQI
22nd Jul 20258310 AMAQI
22nd Jul 20258011 AMAQI
22nd Jul 20258112 PMAQI
22nd Jul 2025781 PMAQI
22nd Jul 2025812 PMAQI
22nd Jul 2025813 PMAQI
22nd Jul 2025824 PMAQI
22nd Jul 2025805 PMAQI
22nd Jul 2025786 PMAQI
22nd Jul 2025807 PMAQI
22nd Jul 2025798 PMAQI
22nd Jul 2025759 PMAQI
22nd Jul 20257310 PMAQI
22nd Jul 20257311 PMAQI
23rd Jul 20257312 AMAQI
23rd Jul 2025681 AMAQI
23rd Jul 2025612 AMAQI
23rd Jul 2025593 AMAQI
23rd Jul 2025584 AMAQI
26°C21/32°C
23rd Jul 2025595 AMAQI
23rd Jul 2025596 AMAQI
23rd Jul 2025617 AMAQI
23rd Jul 2025628 AMAQI
23rd Jul 2025639 AMAQI
23rd Jul 20256410 AMAQI
23rd Jul 20256311 AMAQI
23rd Jul 20256412 PMAQI
23rd Jul 2025631 PMAQI
23rd Jul 2025632 PMAQI
23rd Jul 2025643 PMAQI
23rd Jul 2025634 PMAQI
23rd Jul 2025635 PMAQI
23rd Jul 2025636 PMAQI
23rd Jul 2025647 PMAQI
23rd Jul 2025638 PMAQI
23rd Jul 2025629 PMAQI
23rd Jul 20256210 PMAQI
23rd Jul 20256111 PMAQI
24th Jul 20256012 AMAQI
24th Jul 2025601 AMAQI
24th Jul 2025572 AMAQI
24th Jul 2025573 AMAQI
24th Jul 2025574 AMAQI
27°C22/34°C
24th Jul 2025575 AMAQI
24th Jul 2025576 AMAQI
24th Jul 2025597 AMAQI
24th Jul 2025598 AMAQI
24th Jul 2025599 AMAQI
24th Jul 20256010 AMAQI
24th Jul 20255911 AMAQI
24th Jul 20255912 PMAQI
24th Jul 2025581 PMAQI
24th Jul 2025582 PMAQI
24th Jul 2025583 PMAQI
24th Jul 2025574 PMAQI
24th Jul 2025565 PMAQI
24th Jul 2025546 PMAQI
24th Jul 2025577 PMAQI
24th Jul 2025568 PMAQI
24th Jul 2025509 PMAQI
24th Jul 20254910 PMAQI
24th Jul 20254811 PMAQI
25th Jul 20254812 AMAQI
25th Jul 2025441 AMAQI
25th Jul 2025352 AMAQI
25th Jul 2025313 AMAQI
25th Jul 2025334 AMAQI
29°C25/35°C
25th Jul 2025325 AMAQI
25th Jul 2025326 AMAQI
25th Jul 2025337 AMAQI
25th Jul 2025338 AMAQI
25th Jul 2025329 AMAQI
25th Jul 20253210 AMAQI
25th Jul 20253311 AMAQI
25th Jul 20253312 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025342 PMAQI
25th Jul 2025353 PMAQI
25th Jul 2025354 PMAQI
25th Jul 2025345 PMAQI
25th Jul 2025336 PMAQI
25th Jul 2025347 PMAQI
25th Jul 2025338 PMAQI
25th Jul 2025339 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253311 PMAQI
26th Jul 20253712 AMAQI
26th Jul 2025411 AMAQI
26th Jul 2025432 AMAQI
26th Jul 2025423 AMAQI
26th Jul 2025414 AMAQI
25°C23/28°C
26th Jul 2025385 AMAQI
26th Jul 2025366 AMAQI
26th Jul 2025367 AMAQI
26th Jul 2025338 AMAQI
26th Jul 2025319 AMAQI
26th Jul 20253010 AMAQI
26th Jul 20253111 AMAQI
26th Jul 20253212 PMAQI
26th Jul 2025321 PMAQI
26th Jul 2025332 PMAQI
26th Jul 2025353 PMAQI
26th Jul 2025364 PMAQI
26th Jul 2025375 PMAQI
26th Jul 2025386 PMAQI
26th Jul 2025377 PMAQI
26th Jul 2025368 PMAQI
26th Jul 2025379 PMAQI
26th Jul 20253710 PMAQI
26th Jul 20253711 PMAQI
27th Jul 20253512 AMAQI
27th Jul 2025341 AMAQI
27th Jul 2025302 AMAQI
27th Jul 2025293 AMAQI
27th Jul 2025284 AMAQI
26°C23/30°C
27th Jul 2025295 AMAQI
27th Jul 2025296 AMAQI
27th Jul 2025307 AMAQI
27th Jul 2025318 AMAQI
27th Jul 2025319 AMAQI
27th Jul 20253110 AMAQI
27th Jul 20253211 AMAQI
27th Jul 20253312 PMAQI
27th Jul 2025361 PMAQI
27th Jul 2025352 PMAQI
27th Jul 2025353 PMAQI
27th Jul 2025354 PMAQI
27th Jul 2025355 PMAQI
27th Jul 2025356 PMAQI
27th Jul 2025327 PMAQI
27th Jul 2025328 PMAQI
27th Jul 2025359 PMAQI
27th Jul 20253710 PMAQI
27th Jul 20253811 PMAQI
28th Jul 20254012 AMAQI
28th Jul 2025431 AMAQI
28th Jul 2025462 AMAQI
28th Jul 2025453 AMAQI
28th Jul 2025444 AMAQI
27°C23/32°C
28th Jul 2025435 AMAQI
28th Jul 2025436 AMAQI
28th Jul 2025447 AMAQI
28th Jul 2025478 AMAQI
28th Jul 2025479 AMAQI
28th Jul 20254610 AMAQI
28th Jul 20254111 AMAQI
28th Jul 20254112 PMAQI
28th Jul 2025421 PMAQI
28th Jul 2025452 PMAQI
28th Jul 2025463 PMAQI
28th Jul 2025474 PMAQI
28th Jul 2025465 PMAQI
28th Jul 2025456 PMAQI
28th Jul 2025437 PMAQI
28th Jul 2025428 PMAQI
28th Jul 2025429 PMAQI
28th Jul 20254010 PMAQI
28th Jul 20254111 PMAQI
29th Jul 20254112 AMAQI
29th Jul 2025421 AMAQI
29th Jul 2025412 AMAQI
29th Jul 2025433 AMAQI
29th Jul 2025444 AMAQI
27°C24/32°C
29th Jul 2025455 AMAQI
29th Jul 2025456 AMAQI
29th Jul 2025467 AMAQI
29th Jul 2025478 AMAQI
29th Jul 2025509 AMAQI
29th Jul 20255210 AMAQI
29th Jul 20255111 AMAQI
29th Jul 20254912 PMAQI
29th Jul 2025501 PMAQI
29th Jul 2025502 PMAQI
29th Jul 2025483 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025475 PMAQI
29th Jul 2025486 PMAQI
29th Jul 2025477 PMAQI
29th Jul 2025478 PMAQI
29th Jul 2025479 PMAQI
29th Jul 20254810 PMAQI
29th Jul 20254911 PMAQI
30th Jul 20254812 AMAQI
30th Jul 2025491 AMAQI
30th Jul 2025462 AMAQI
30th Jul 2025443 AMAQI
30th Jul 2025444 AMAQI
28°C23/35°C
30th Jul 2025445 AMAQI
30th Jul 2025436 AMAQI
30th Jul 2025477 AMAQI
30th Jul 2025508 AMAQI
30th Jul 2025509 AMAQI
30th Jul 20254810 AMAQI
30th Jul 20254511 AMAQI
30th Jul 20254412 PMAQI
30th Jul 2025441 PMAQI
30th Jul 2025462 PMAQI
30th Jul 2025463 PMAQI
30th Jul 2025464 PMAQI
30th Jul 2025465 PMAQI
30th Jul 2025466 PMAQI
30th Jul 2025467 PMAQI
30th Jul 2025468 PMAQI
30th Jul 2025529 PMAQI
30th Jul 20255610 PMAQI
30th Jul 20255611 PMAQI
31st Jul 20255912 AMAQI
31st Jul 2025601 AMAQI
31st Jul 2025612 AMAQI
31st Jul 2025633 AMAQI
31st Jul 2025694 AMAQI
24°C23/25°C
31st Jul 2025725 AMAQI
31st Jul 2025836 AMAQI
31st Jul 2025927 AMAQI
31st Jul 20251028 AMAQI
31st Jul 20251149 AMAQI
31st Jul 202511810 AMAQI
31st Jul 202514011 AMAQI
31st Jul 202513812 PMAQI
31st Jul 20251411 PMAQI
31st Jul 20251482 PMAQI
31st Jul 20251213 PMAQI
31st Jul 20251094 PMAQI
31st Jul 20251305 PMAQI
31st Jul 20251316 PMAQI
31st Jul 20251087 PMAQI
31st Jul 20251198 PMAQI
31st Jul 20251209 PMAQI
31st Jul 202511810 PMAQI
31st Jul 202511611 PMAQI
1st Aug 202511212 AMAQI
1st Aug 2025971 AMAQI
1st Aug 2025932 AMAQI
1st Aug 2025983 AMAQI
1st Aug 20251004 AMAQI
23°C20/26°C
1st Aug 20251035 AMAQI
1st Aug 2025996 AMAQI
1st Aug 2025927 AMAQI
1st Aug 2025958 AMAQI
1st Aug 20251049 AMAQI
1st Aug 20258810 AMAQI
1st Aug 20258111 AMAQI
1st Aug 20257812 PMAQI
1st Aug 2025781 PMAQI
1st Aug 2025752 PMAQI
1st Aug 2025733 PMAQI
1st Aug 2025784 PMAQI
1st Aug 2025875 PMAQI
1st Aug 2025826 PMAQI
1st Aug 2025897 PMAQI
1st Aug 2025828 PMAQI
1st Aug 2025809 PMAQI
1st Aug 20257810 PMAQI
1st Aug 20258511 PMAQI
2nd Aug 20258512 AMAQI
2nd Aug 2025871 AMAQI
2nd Aug 2025842 AMAQI
2nd Aug 2025843 AMAQI
2nd Aug 2025814 AMAQI
22°C20/24°C
2nd Aug 2025845 AMAQI
2nd Aug 2025736 AMAQI
2nd Aug 2025727 AMAQI
2nd Aug 2025718 AMAQI
2nd Aug 2025749 AMAQI
2nd Aug 20257510 AMAQI
2nd Aug 20257211 AMAQI
2nd Aug 20256712 PMAQI
2nd Aug 2025631 PMAQI
2nd Aug 2025602 PMAQI
2nd Aug 2025603 PMAQI
2nd Aug 2025574 PMAQI
2nd Aug 2025585 PMAQI
2nd Aug 2025596 PMAQI
2nd Aug 2025757 PMAQI
2nd Aug 2025718 PMAQI
2nd Aug 2025689 PMAQI
2nd Aug 20256810 PMAQI
2nd Aug 20257511 PMAQI
3rd Aug 20257712 AMAQI
3rd Aug 2025771 AMAQI
3rd Aug 2025792 AMAQI
3rd Aug 2025793 AMAQI
3rd Aug 2025804 AMAQI
23°C18/27°C
3rd Aug 2025775 AMAQI
3rd Aug 2025766 AMAQI
3rd Aug 2025767 AMAQI
3rd Aug 2025788 AMAQI
3rd Aug 2025729 AMAQI
3rd Aug 20257210 AMAQI
3rd Aug 20257111 AMAQI
3rd Aug 20256912 PMAQI
3rd Aug 2025721 PMAQI
3rd Aug 2025762 PMAQI
3rd Aug 2025763 PMAQI
3rd Aug 2025754 PMAQI
3rd Aug 2025765 PMAQI
3rd Aug 2025766 PMAQI
3rd Aug 2025857 PMAQI
3rd Aug 2025848 PMAQI
3rd Aug 2025859 PMAQI
3rd Aug 20259210 PMAQI
3rd Aug 202510611 PMAQI
4th Aug 202511812 AMAQI
4th Aug 20251181 AMAQI
4th Aug 20251122 AMAQI
4th Aug 20251123 AMAQI
4th Aug 20251104 AMAQI
23°C19/27°C
4th Aug 20251015 AMAQI
4th Aug 2025926 AMAQI
4th Aug 2025907 AMAQI
4th Aug 2025938 AMAQI
4th Aug 2025899 AMAQI
4th Aug 20258410 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20257312 PMAQI
4th Aug 2025661 PMAQI
4th Aug 2025662 PMAQI
4th Aug 2025683 PMAQI
4th Aug 2025654 PMAQI
4th Aug 2025645 PMAQI
4th Aug 2025636 PMAQI
4th Aug 2025827 PMAQI
4th Aug 2025718 PMAQI
4th Aug 2025629 PMAQI
4th Aug 20256210 PMAQI
4th Aug 20256311 PMAQI
5th Aug 20256412 AMAQI
5th Aug 2025661 AMAQI
5th Aug 2025702 AMAQI
5th Aug 2025703 AMAQI
5th Aug 2025764 AMAQI
22°C20/26°C
5th Aug 2025795 AMAQI
5th Aug 2025826 AMAQI
5th Aug 2025847 AMAQI
5th Aug 2025888 AMAQI
5th Aug 2025949 AMAQI
5th Aug 20259710 AMAQI
5th Aug 202510011 AMAQI
5th Aug 20259812 PMAQI
5th Aug 2025941 PMAQI
5th Aug 2025852 PMAQI
5th Aug 2025843 PMAQI
5th Aug 2025864 PMAQI
5th Aug 2025875 PMAQI
5th Aug 2025926 PMAQI
5th Aug 2025807 PMAQI
5th Aug 2025958 PMAQI
5th Aug 20251099 PMAQI
5th Aug 202510910 PMAQI
5th Aug 202511011 PMAQI
6th Aug 202511212 AMAQI
6th Aug 20251121 AMAQI
6th Aug 20251112 AMAQI
6th Aug 20251013 AMAQI
6th Aug 20251034 AMAQI
23°C20/26°C
6th Aug 20251005 AMAQI
6th Aug 20251006 AMAQI
6th Aug 2025997 AMAQI
6th Aug 2025998 AMAQI
6th Aug 2025969 AMAQI
6th Aug 20259610 AMAQI
6th Aug 20259011 AMAQI
6th Aug 20258812 PMAQI
6th Aug 2025871 PMAQI
6th Aug 2025842 PMAQI
6th Aug 2025823 PMAQI
6th Aug 2025824 PMAQI
6th Aug 2025815 PMAQI
6th Aug 2025796 PMAQI
6th Aug 20251027 PMAQI
6th Aug 2025878 PMAQI
6th Aug 2025769 PMAQI
6th Aug 20257510 PMAQI
6th Aug 20257411 PMAQI
7th Aug 20258012 AMAQI
7th Aug 2025821 AMAQI
7th Aug 2025792 AMAQI
7th Aug 2025793 AMAQI
7th Aug 2025794 AMAQI
25°C21/31°C
7th Aug 2025765 AMAQI
7th Aug 2025736 AMAQI
7th Aug 2025747 AMAQI
7th Aug 2025728 AMAQI
7th Aug 2025709 AMAQI
7th Aug 20256810 AMAQI
7th Aug 20256211 AMAQI
7th Aug 20255912 PMAQI
7th Aug 2025581 PMAQI
7th Aug 2025602 PMAQI
7th Aug 2025633 PMAQI
7th Aug 2025634 PMAQI
7th Aug 2025645 PMAQI
7th Aug 2025646 PMAQI
7th Aug 2025677 PMAQI
7th Aug 2025658 PMAQI
7th Aug 2025639 PMAQI
7th Aug 20256310 PMAQI
7th Aug 20256311 PMAQI
8th Aug 20256412 AMAQI
8th Aug 2025601 AMAQI
8th Aug 2025542 AMAQI
8th Aug 2025533 AMAQI
8th Aug 2025534 AMAQI
27°C22/32°C
8th Aug 2025525 AMAQI
8th Aug 2025536 AMAQI
8th Aug 2025557 AMAQI
8th Aug 2025558 AMAQI
8th Aug 2025559 AMAQI
8th Aug 20255610 AMAQI
8th Aug 20255711 AMAQI
8th Aug 20255612 PMAQI
8th Aug 2025561 PMAQI
8th Aug 2025572 PMAQI
8th Aug 2025573 PMAQI
8th Aug 2025574 PMAQI
8th Aug 2025575 PMAQI
8th Aug 2025566 PMAQI
8th Aug 2025567 PMAQI
8th Aug 2025578 PMAQI
8th Aug 2025589 PMAQI
8th Aug 20255710 PMAQI
8th Aug 20255611 PMAQI
9th Aug 20255612 AMAQI
9th Aug 2025551 AMAQI
9th Aug 2025522 AMAQI
9th Aug 2025513 AMAQI
9th Aug 2025514 AMAQI
29°C23/33°C
9th Aug 2025515 AMAQI
9th Aug 2025526 AMAQI
9th Aug 2025537 AMAQI
9th Aug 2025548 AMAQI
9th Aug 2025549 AMAQI
9th Aug 20255410 AMAQI
9th Aug 20255411 AMAQI
9th Aug 20255312 PMAQI
9th Aug 2025531 PMAQI
9th Aug 2025532 PMAQI
9th Aug 2025543 PMAQI
9th Aug 2025544 PMAQI
9th Aug 2025535 PMAQI
9th Aug 2025536 PMAQI
9th Aug 2025537 PMAQI
9th Aug 2025538 PMAQI
9th Aug 2025539 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 PMAQI
10th Aug 20255212 AMAQI
10th Aug 2025511 AMAQI
10th Aug 2025482 AMAQI
10th Aug 2025473 AMAQI
10th Aug 2025484 AMAQI
29°C23/34°C
10th Aug 2025485 AMAQI
10th Aug 2025486 AMAQI
10th Aug 2025487 AMAQI
10th Aug 2025488 AMAQI
10th Aug 2025499 AMAQI
10th Aug 20254910 AMAQI
10th Aug 20254811 AMAQI
10th Aug 20254712 PMAQI
10th Aug 2025471 PMAQI
10th Aug 2025482 PMAQI
10th Aug 2025493 PMAQI
10th Aug 2025484 PMAQI
10th Aug 2025485 PMAQI
10th Aug 2025486 PMAQI
10th Aug 2025497 PMAQI
10th Aug 2025498 PMAQI
10th Aug 2025489 PMAQI
10th Aug 20254910 PMAQI
10th Aug 20254911 PMAQI
11th Aug 20254812 AMAQI
11th Aug 2025481 AMAQI
11th Aug 2025482 AMAQI
11th Aug 2025483 AMAQI
11th Aug 2025484 AMAQI
29°C25/33°C
11th Aug 2025485 AMAQI
11th Aug 2025496 AMAQI
11th Aug 2025497 AMAQI
11th Aug 2025488 AMAQI
11th Aug 2025489 AMAQI
11th Aug 20254910 AMAQI
11th Aug 20254911 AMAQI
11th Aug 20254712 PMAQI
11th Aug 2025451 PMAQI
11th Aug 2025452 PMAQI
11th Aug 2025443 PMAQI
11th Aug 2025404 PMAQI
11th Aug 2025395 PMAQI
11th Aug 2025396 PMAQI
11th Aug 2025477 PMAQI
11th Aug 2025448 PMAQI
11th Aug 2025429 PMAQI
11th Aug 20254310 PMAQI
11th Aug 20254211 PMAQI
12th Aug 20254012 AMAQI
12th Aug 2025401 AMAQI
12th Aug 2025402 AMAQI
12th Aug 2025383 AMAQI
12th Aug 2025404 AMAQI
26°C23/32°C
12th Aug 2025465 AMAQI
12th Aug 2025486 AMAQI
12th Aug 2025497 AMAQI
12th Aug 2025488 AMAQI
12th Aug 2025459 AMAQI
12th Aug 20254110 AMAQI
12th Aug 20254011 AMAQI
12th Aug 20254412 PMAQI
12th Aug 2025471 PMAQI
12th Aug 2025512 PMAQI
12th Aug 2025523 PMAQI
12th Aug 2025474 PMAQI
12th Aug 2025415 PMAQI
12th Aug 2025386 PMAQI
12th Aug 2025427 PMAQI
12th Aug 2025388 PMAQI
12th Aug 2025379 PMAQI
12th Aug 20253810 PMAQI
12th Aug 20253711 PMAQI
13th Aug 20253512 AMAQI
13th Aug 2025351 AMAQI
13th Aug 2025342 AMAQI
13th Aug 2025323 AMAQI
13th Aug 2025334 AMAQI
29°C24/35°C
13th Aug 2025335 AMAQI
5 AM13th Aug 2025366 AMAQI
13th Aug 2025427 AMAQI
13th Aug 2025478 AMAQI
13th Aug 2025529 AMAQI
13th Aug 20255310 AMAQI
13th Aug 20255611 AMAQI
13th Aug 20255812 PMAQI
12 PM13th Aug 2025601 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
58AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
58AQI
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. 58), while the lowest AQI was between 5 AM to 8 PM (Avg. 58).
Night time
Avg. Highest Time
12 AM - 11 PM
58AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
58AQI
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. 58), while the lowest AQI was between 12 AM to 11 PM (Avg. 58).
2025 Days Vs Air Quality
Chicago, Illinois, United States
2025
72%
120
28%
46
0.6%
1
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Good
120 DaysModerate
46 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 225 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
Chicago, Illinois, 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 February 2025
53AQI
53AQI
2nd February 2025
28AQI
28AQI
1st March 2025
23AQI
23AQI
2nd March 2025
25AQI
25AQI
3rd March 2025
37AQI
37AQI
4th March 2025
35AQI
35AQI
5th March 2025
38AQI
38AQI
6th March 2025
21AQI
21AQI
7th March 2025
23AQI
23AQI
8th March 2025
33AQI
33AQI
9th March 2025
27AQI
27AQI
10th March 2025
28AQI
28AQI
11th March 2025
33AQI
33AQI
12th March 2025
24AQI
24AQI
13th March 2025
36AQI
36AQI
14th March 2025
53AQI
53AQI
15th March 2025
75AQI
75AQI
16th March 2025
53AQI
53AQI
17th March 2025
26AQI
26AQI
18th March 2025
24AQI
24AQI
19th March 2025
32AQI
32AQI
20th March 2025
29AQI
29AQI
21st March 2025
23AQI
23AQI
22nd March 2025
22AQI
22AQI
23rd March 2025
23AQI
23AQI
24th March 2025
21AQI
21AQI
25th March 2025
29AQI
29AQI
26th March 2025
38AQI
38AQI
27th March 2025
51AQI
51AQI
28th March 2025
45AQI
45AQI
29th March 2025
36AQI
36AQI
30th March 2025
34AQI
34AQI
31st March 2025
20AQI
20AQI
1st April 2025
21AQI
21AQI
2nd April 2025
36AQI
36AQI
3rd April 2025
28AQI
28AQI
4th April 2025
29AQI
29AQI
5th April 2025
24AQI
24AQI
6th April 2025
23AQI
23AQI
7th April 2025
25AQI
25AQI
8th April 2025
19AQI
19AQI
9th April 2025
33AQI
33AQI
10th April 2025
48AQI
48AQI
11th April 2025
45AQI
45AQI
12th April 2025
53AQI
53AQI
13th April 2025
44AQI
44AQI
14th April 2025
34AQI
34AQI
15th April 2025
20AQI
20AQI
16th April 2025
22AQI
22AQI
17th April 2025
35AQI
35AQI
18th April 2025
49AQI
49AQI
19th April 2025
42AQI
42AQI
20th April 2025
40AQI
40AQI
21st April 2025
22AQI
22AQI
22nd April 2025
31AQI
31AQI
23rd April 2025
31AQI
31AQI
24th April 2025
52AQI
52AQI
25th April 2025
28AQI
28AQI
26th April 2025
19AQI
19AQI
27th April 2025
27AQI
27AQI
28th April 2025
35AQI
35AQI
29th April 2025
36AQI
36AQI
30th April 2025
21AQI
21AQI
1st May 2025
30AQI
30AQI
2nd May 2025
28AQI
28AQI
3rd May 2025
17AQI
17AQI
4th May 2025
17AQI
17AQI
5th May 2025
22AQI
22AQI
6th May 2025
38AQI
38AQI
7th May 2025
40AQI
40AQI
8th May 2025
18AQI
18AQI
9th May 2025
23AQI
23AQI
10th May 2025
32AQI
32AQI
11th May 2025
23AQI
23AQI
12th May 2025
37AQI
37AQI
13th May 2025
34AQI
34AQI
14th May 2025
33AQI
33AQI
15th May 2025
45AQI
45AQI
16th May 2025
37AQI
37AQI
17th May 2025
22AQI
22AQI
18th May 2025
20AQI
20AQI
19th May 2025
19AQI
19AQI
20th May 2025
25AQI
25AQI
21st May 2025
21AQI
21AQI
22nd May 2025
15AQI
15AQI
23rd May 2025
20AQI
20AQI
24th May 2025
18AQI
18AQI
25th May 2025
16AQI
16AQI
26th May 2025
22AQI
22AQI
27th May 2025
26AQI
26AQI
28th May 2025
31AQI
31AQI
29th May 2025
41AQI
41AQI
30th May 2025
46AQI
46AQI
31st May 2025
39AQI
39AQI
1st June 2025
36AQI
36AQI
2nd June 2025
42AQI
42AQI
3rd June 2025
57AQI
57AQI
4th June 2025
58AQI
58AQI
5th June 2025
98AQI
98AQI
6th June 2025
85AQI
85AQI
7th June 2025
81AQI
81AQI
8th June 2025
78AQI
78AQI
9th June 2025
71AQI
71AQI
10th June 2025
61AQI
61AQI
11th June 2025
72AQI
72AQI
12th June 2025
80AQI
80AQI
13th June 2025
76AQI
76AQI
14th June 2025
63AQI
63AQI
15th June 2025
50AQI
50AQI
16th June 2025
55AQI
55AQI
17th June 2025
49AQI
49AQI
18th June 2025
37AQI
37AQI
19th June 2025
31AQI
31AQI
20th June 2025
43AQI
43AQI
21st June 2025
42AQI
42AQI
22nd June 2025
46AQI
46AQI
23rd June 2025
56AQI
56AQI
24th June 2025
47AQI
47AQI
25th June 2025
34AQI
34AQI
26th June 2025
47AQI
47AQI
27th June 2025
38AQI
38AQI
28th June 2025
24AQI
24AQI
29th June 2025
36AQI
36AQI
30th June 2025
33AQI
33AQI
1st July 2025
33AQI
33AQI
2nd July 2025
54AQI
54AQI
3rd July 2025
54AQI
54AQI
4th July 2025
57AQI
57AQI
5th July 2025
73AQI
73AQI
6th July 2025
54AQI
54AQI
7th July 2025
53AQI
53AQI
8th July 2025
67AQI
67AQI
9th July 2025
52AQI
52AQI
10th July 2025
45AQI
45AQI
11th July 2025
45AQI
45AQI
12th July 2025
31AQI
31AQI
13th July 2025
57AQI
57AQI
14th July 2025
72AQI
72AQI
15th July 2025
80AQI
80AQI
16th July 2025
51AQI
51AQI
17th July 2025
27AQI
27AQI
18th July 2025
29AQI
29AQI
19th July 2025
37AQI
37AQI
20th July 2025
29AQI
29AQI
21st July 2025
68AQI
68AQI
22nd July 2025
78AQI
78AQI
23rd July 2025
63AQI
63AQI
24th July 2025
56AQI
56AQI
25th July 2025
34AQI
34AQI
26th July 2025
37AQI
37AQI
27th July 2025
33AQI
33AQI
28th July 2025
43AQI
43AQI
29th July 2025
46AQI
46AQI
30th July 2025
47AQI
47AQI
31st July 2025
103AQI
103AQI
1st August 2025
89AQI
89AQI
2nd August 2025
73AQI
73AQI
3rd August 2025
79AQI
79AQI
4th August 2025
85AQI
85AQI
5th August 2025
87AQI
87AQI
6th August 2025
93AQI
93AQI
7th August 2025
69AQI
69AQI
8th August 2025
56AQI
56AQI
9th August 2025
53AQI
53AQI
10th August 2025
48AQI
48AQI
11th August 2025
46AQI
46AQI
12th August 2025
43AQI
43AQI
41AQI
33AQI
32AQI
28AQI
54AQI
52AQI
68AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202542AQI
1
1
27
4
28
2
31
16
14
14
16
1
3
9
120
46
1
Highest AQI recorded in
August68AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
42AQILeast Polluted Year Recorded
2025(Avg.)
42AQIChicago's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
