Northbrook, 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
Northbrook, Illinois, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Aug 2025
102AQILowest AQI recorded on
5th Aug 2025
87AQISame Day Analysis (5th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 87 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Northbrook, Illinois, United States
AQI
Day
Night
.
5 AM5th Aug 2025
8 PM
4 AM6th Aug 2025
Day time
Avg. Highest Time
5PM5th Aug
104AQI
Avg. Lowest Time
5AM5th Aug
85AQI
Night time
Avg. Highest Time
12AM6th Aug
119AQI
Avg. Lowest Time
3AM6th Aug
110AQI
In the last 24 hours,
Northbrook's AQI reached its highest point of 119 at 12 AM during the Night, while the lowest point, 85, was recorded at 5 AM during the Day between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Northbrook, Illinois, United States
JulAug
07th - 08th08th - 09th09th - 10th10th - 11th11th - 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
Day
Night
7th Jul 2025365 AMAQI
7th Jul 2025386 AMAQI
7th Jul 2025417 AMAQI
7th Jul 2025448 AMAQI
7th Jul 2025449 AMAQI
7th Jul 20254710 AMAQI
7th Jul 20255111 AMAQI
7th Jul 20255212 PMAQI
7th Jul 2025531 PMAQI
7th Jul 2025532 PMAQI
7th Jul 2025523 PMAQI
7th Jul 2025524 PMAQI
7th Jul 2025535 PMAQI
7th Jul 2025526 PMAQI
7th Jul 2025487 PMAQI
7th Jul 2025488 PMAQI
7th Jul 2025519 PMAQI
7th Jul 20255110 PMAQI
7th Jul 20255311 PMAQI
8th Jul 20255312 AMAQI
8th Jul 2025521 AMAQI
8th Jul 2025532 AMAQI
8th Jul 2025543 AMAQI
8th Jul 2025534 AMAQI
22°C19/28°C
8th Jul 2025535 AMAQI
8th Jul 2025526 AMAQI
8th Jul 2025557 AMAQI
8th Jul 2025578 AMAQI
8th Jul 2025629 AMAQI
8th Jul 20256410 AMAQI
8th Jul 20256411 AMAQI
8th Jul 20256212 PMAQI
8th Jul 2025611 PMAQI
8th Jul 2025622 PMAQI
8th Jul 2025623 PMAQI
8th Jul 2025604 PMAQI
8th Jul 2025585 PMAQI
8th Jul 2025566 PMAQI
8th Jul 2025567 PMAQI
8th Jul 2025568 PMAQI
8th Jul 2025549 PMAQI
8th Jul 20255410 PMAQI
8th Jul 20255511 PMAQI
9th Jul 20255512 AMAQI
9th Jul 2025531 AMAQI
9th Jul 2025362 AMAQI
9th Jul 2025343 AMAQI
9th Jul 2025344 AMAQI
26°C20/34°C
9th Jul 2025335 AMAQI
9th Jul 2025336 AMAQI
9th Jul 2025347 AMAQI
9th Jul 2025338 AMAQI
9th Jul 2025359 AMAQI
9th Jul 20253810 AMAQI
9th Jul 20253811 AMAQI
9th Jul 20254012 PMAQI
9th Jul 2025401 PMAQI
9th Jul 2025412 PMAQI
9th Jul 2025453 PMAQI
9th Jul 2025454 PMAQI
9th Jul 2025445 PMAQI
9th Jul 2025446 PMAQI
9th Jul 2025447 PMAQI
9th Jul 2025448 PMAQI
9th Jul 2025429 PMAQI
9th Jul 20254410 PMAQI
9th Jul 20254311 PMAQI
10th Jul 20254212 AMAQI
10th Jul 2025391 AMAQI
10th Jul 2025332 AMAQI
10th Jul 2025323 AMAQI
10th Jul 2025324 AMAQI
23°C19/31°C
10th Jul 2025325 AMAQI
10th Jul 2025346 AMAQI
10th Jul 2025347 AMAQI
10th Jul 2025348 AMAQI
10th Jul 2025349 AMAQI
10th Jul 20253510 AMAQI
10th Jul 20253511 AMAQI
10th Jul 20253612 PMAQI
10th Jul 2025351 PMAQI
10th Jul 2025352 PMAQI
10th Jul 2025383 PMAQI
10th Jul 2025384 PMAQI
10th Jul 2025395 PMAQI
10th Jul 2025386 PMAQI
10th Jul 2025367 PMAQI
10th Jul 2025378 PMAQI
10th Jul 2025369 PMAQI
10th Jul 20253610 PMAQI
10th Jul 20253711 PMAQI
11th Jul 20253812 AMAQI
11th Jul 2025351 AMAQI
11th Jul 2025292 AMAQI
11th Jul 2025293 AMAQI
11th Jul 2025284 AMAQI
23°C17/30°C
11th Jul 2025305 AMAQI
11th Jul 2025286 AMAQI
11th Jul 2025297 AMAQI
11th Jul 2025278 AMAQI
11th Jul 2025289 AMAQI
11th Jul 20252610 AMAQI
11th Jul 20252711 AMAQI
11th Jul 20252812 PMAQI
11th Jul 2025291 PMAQI
11th Jul 2025322 PMAQI
11th Jul 2025353 PMAQI
11th Jul 2025344 PMAQI
11th Jul 2025345 PMAQI
11th Jul 2025346 PMAQI
11th Jul 2025337 PMAQI
11th Jul 2025328 PMAQI
11th Jul 2025349 PMAQI
11th Jul 20253310 PMAQI
11th Jul 20253311 PMAQI
12th Jul 20253212 AMAQI
12th Jul 2025281 AMAQI
12th Jul 2025222 AMAQI
12th Jul 2025283 AMAQI
12th Jul 2025204 AMAQI
26°C22/33°C
12th Jul 2025215 AMAQI
12th Jul 2025206 AMAQI
12th Jul 2025227 AMAQI
12th Jul 2025238 AMAQI
12th Jul 2025229 AMAQI
12th Jul 20252310 AMAQI
12th Jul 20252311 AMAQI
12th Jul 20252312 PMAQI
12th Jul 2025221 PMAQI
12th Jul 2025262 PMAQI
12th Jul 2025263 PMAQI
12th Jul 2025264 PMAQI
12th Jul 2025275 PMAQI
12th Jul 2025236 PMAQI
12th Jul 2025247 PMAQI
12th Jul 2025268 PMAQI
12th Jul 2025299 PMAQI
12th Jul 20252810 PMAQI
12th Jul 20253111 PMAQI
13th Jul 20253512 AMAQI
13th Jul 2025441 AMAQI
13th Jul 2025602 AMAQI
13th Jul 2025643 AMAQI
13th Jul 2025624 AMAQI
26°C23/32°C
13th Jul 2025605 AMAQI
13th Jul 2025586 AMAQI
13th Jul 2025587 AMAQI
13th Jul 2025568 AMAQI
13th Jul 2025589 AMAQI
13th Jul 20256210 AMAQI
13th Jul 20256411 AMAQI
13th Jul 20256312 PMAQI
13th Jul 2025661 PMAQI
13th Jul 2025642 PMAQI
13th Jul 2025633 PMAQI
13th Jul 2025614 PMAQI
13th Jul 2025645 PMAQI
13th Jul 2025656 PMAQI
13th Jul 2025607 PMAQI
13th Jul 2025588 PMAQI
13th Jul 2025619 PMAQI
13th Jul 20256010 PMAQI
13th Jul 20256111 PMAQI
14th Jul 20256212 AMAQI
14th Jul 2025631 AMAQI
14th Jul 2025722 AMAQI
14th Jul 2025713 AMAQI
14th Jul 2025774 AMAQI
24°C18/29°C
14th Jul 2025845 AMAQI
14th Jul 2025846 AMAQI
14th Jul 2025847 AMAQI
14th Jul 2025818 AMAQI
14th Jul 2025789 AMAQI
14th Jul 20257910 AMAQI
14th Jul 20257611 AMAQI
14th Jul 20257612 PMAQI
14th Jul 2025781 PMAQI
14th Jul 2025802 PMAQI
14th Jul 2025843 PMAQI
14th Jul 2025814 PMAQI
14th Jul 2025825 PMAQI
14th Jul 2025856 PMAQI
14th Jul 2025777 PMAQI
14th Jul 2025778 PMAQI
14th Jul 2025809 PMAQI
14th Jul 20257610 PMAQI
14th Jul 20257911 PMAQI
15th Jul 20257712 AMAQI
15th Jul 2025801 AMAQI
15th Jul 2025882 AMAQI
15th Jul 2025893 AMAQI
15th Jul 2025924 AMAQI
25°C17/33°C
15th Jul 2025885 AMAQI
15th Jul 2025906 AMAQI
15th Jul 2025947 AMAQI
15th Jul 2025898 AMAQI
15th Jul 2025869 AMAQI
15th Jul 20258310 AMAQI
15th Jul 20257611 AMAQI
15th Jul 20257412 PMAQI
15th Jul 2025731 PMAQI
15th Jul 2025772 PMAQI
15th Jul 2025793 PMAQI
15th Jul 2025784 PMAQI
15th Jul 2025775 PMAQI
15th Jul 2025786 PMAQI
15th Jul 2025827 PMAQI
15th Jul 2025808 PMAQI
15th Jul 2025729 PMAQI
15th Jul 20257410 PMAQI
15th Jul 20257311 PMAQI
16th Jul 20257212 AMAQI
16th Jul 2025661 AMAQI
16th Jul 2025532 AMAQI
16th Jul 2025503 AMAQI
16th Jul 2025444 AMAQI
27°C20/34°C
16th Jul 2025365 AMAQI
16th Jul 2025316 AMAQI
16th Jul 2025387 AMAQI
16th Jul 2025428 AMAQI
16th Jul 2025429 AMAQI
16th Jul 20254310 AMAQI
16th Jul 20254511 AMAQI
16th Jul 20254412 PMAQI
16th Jul 2025441 PMAQI
16th Jul 2025442 PMAQI
16th Jul 2025473 PMAQI
16th Jul 2025464 PMAQI
16th Jul 2025445 PMAQI
16th Jul 2025426 PMAQI
16th Jul 2025477 PMAQI
16th Jul 2025468 PMAQI
16th Jul 2025409 PMAQI
16th Jul 20254010 PMAQI
16th Jul 20253711 PMAQI
17th Jul 20253512 AMAQI
17th Jul 2025281 AMAQI
17th Jul 2025162 AMAQI
17th Jul 2025163 AMAQI
17th Jul 2025154 AMAQI
29°C24/33°C
17th Jul 2025165 AMAQI
17th Jul 2025166 AMAQI
17th Jul 2025187 AMAQI
17th Jul 2025188 AMAQI
17th Jul 2025189 AMAQI
17th Jul 20251910 AMAQI
17th Jul 20251911 AMAQI
17th Jul 20251812 PMAQI
17th Jul 2025181 PMAQI
17th Jul 2025172 PMAQI
17th Jul 2025193 PMAQI
17th Jul 2025194 PMAQI
17th Jul 2025185 PMAQI
17th Jul 2025206 PMAQI
17th Jul 2025207 PMAQI
17th Jul 2025188 PMAQI
17th Jul 2025179 PMAQI
17th Jul 20252010 PMAQI
17th Jul 20252111 PMAQI
18th Jul 20252012 AMAQI
18th Jul 2025161 AMAQI
18th Jul 2025152 AMAQI
18th Jul 2025143 AMAQI
18th Jul 2025124 AMAQI
20°C18/21°C
18th Jul 2025135 AMAQI
18th Jul 2025146 AMAQI
18th Jul 2025167 AMAQI
18th Jul 2025158 AMAQI
18th Jul 2025159 AMAQI
18th Jul 20251610 AMAQI
18th Jul 20251611 AMAQI
18th Jul 20251612 PMAQI
18th Jul 2025181 PMAQI
18th Jul 2025162 PMAQI
18th Jul 2025183 PMAQI
18th Jul 2025184 PMAQI
18th Jul 2025185 PMAQI
18th Jul 2025176 PMAQI
18th Jul 2025167 PMAQI
18th Jul 2025178 PMAQI
18th Jul 2025209 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252311 PMAQI
19th Jul 20252312 AMAQI
19th Jul 2025261 AMAQI
19th Jul 2025312 AMAQI
19th Jul 2025313 AMAQI
19th Jul 2025344 AMAQI
22°C17/30°C
19th Jul 2025355 AMAQI
19th Jul 2025336 AMAQI
19th Jul 2025327 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252510 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025302 PMAQI
19th Jul 2025303 PMAQI
19th Jul 2025284 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025276 PMAQI
19th Jul 2025287 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025279 PMAQI
19th Jul 20252810 PMAQI
19th Jul 20253011 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025281 AMAQI
20th Jul 2025242 AMAQI
20th Jul 2025223 AMAQI
20th Jul 2025224 AMAQI
25°C21/28°C
20th Jul 2025235 AMAQI
20th Jul 2025236 AMAQI
20th Jul 2025227 AMAQI
20th Jul 2025218 AMAQI
20th Jul 2025209 AMAQI
20th Jul 20252010 AMAQI
20th Jul 20252211 AMAQI
20th Jul 20252112 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025246 PMAQI
20th Jul 2025237 PMAQI
20th Jul 2025248 PMAQI
20th Jul 2025279 PMAQI
20th Jul 20253310 PMAQI
20th Jul 20254311 PMAQI
21st Jul 20255212 AMAQI
21st Jul 2025601 AMAQI
21st Jul 20251022 AMAQI
21st Jul 20251053 AMAQI
21st Jul 20251054 AMAQI
21°C19/22°C
21st Jul 20251195 AMAQI
21st Jul 20251186 AMAQI
21st Jul 20251137 AMAQI
21st Jul 20251098 AMAQI
21st Jul 2025989 AMAQI
21st Jul 20259210 AMAQI
21st Jul 20259011 AMAQI
21st Jul 20258312 PMAQI
21st Jul 2025861 PMAQI
21st Jul 2025802 PMAQI
21st Jul 2025843 PMAQI
21st Jul 2025824 PMAQI
21st Jul 2025825 PMAQI
21st Jul 2025816 PMAQI
21st Jul 2025887 PMAQI
21st Jul 2025878 PMAQI
21st Jul 2025809 PMAQI
21st Jul 20258110 PMAQI
21st Jul 20258111 PMAQI
22nd Jul 20257712 AMAQI
22nd Jul 2025781 AMAQI
22nd Jul 2025702 AMAQI
22nd Jul 2025683 AMAQI
22nd Jul 2025624 AMAQI
23°C18/29°C
22nd Jul 2025625 AMAQI
22nd Jul 2025626 AMAQI
22nd Jul 2025637 AMAQI
22nd Jul 2025678 AMAQI
22nd Jul 2025739 AMAQI
22nd Jul 20257810 AMAQI
22nd Jul 20257811 AMAQI
22nd Jul 20257812 PMAQI
22nd Jul 2025761 PMAQI
22nd Jul 2025762 PMAQI
22nd Jul 2025763 PMAQI
22nd Jul 2025744 PMAQI
22nd Jul 2025725 PMAQI
22nd Jul 2025706 PMAQI
22nd Jul 2025727 PMAQI
22nd Jul 2025698 PMAQI
22nd Jul 2025689 PMAQI
22nd Jul 20256810 PMAQI
22nd Jul 20257011 PMAQI
23rd Jul 20256812 AMAQI
23rd Jul 2025641 AMAQI
23rd Jul 2025582 AMAQI
23rd Jul 2025563 AMAQI
23rd Jul 2025564 AMAQI
26°C19/33°C
23rd Jul 2025565 AMAQI
23rd Jul 2025576 AMAQI
23rd Jul 2025597 AMAQI
23rd Jul 2025608 AMAQI
23rd Jul 2025609 AMAQI
23rd Jul 20256110 AMAQI
23rd Jul 20256011 AMAQI
23rd Jul 20256012 PMAQI
23rd Jul 2025581 PMAQI
23rd Jul 2025592 PMAQI
23rd Jul 2025603 PMAQI
23rd Jul 2025604 PMAQI
23rd Jul 2025605 PMAQI
23rd Jul 2025606 PMAQI
23rd Jul 2025607 PMAQI
23rd Jul 2025608 PMAQI
23rd Jul 2025589 PMAQI
23rd Jul 20255810 PMAQI
23rd Jul 20255811 PMAQI
24th Jul 20255712 AMAQI
24th Jul 2025531 AMAQI
24th Jul 2025422 AMAQI
24th Jul 2025403 AMAQI
24th Jul 2025414 AMAQI
28°C22/37°C
24th Jul 2025405 AMAQI
24th Jul 2025426 AMAQI
24th Jul 2025467 AMAQI
24th Jul 2025458 AMAQI
24th Jul 2025459 AMAQI
24th Jul 20254510 AMAQI
24th Jul 20254611 AMAQI
24th Jul 20254212 PMAQI
24th Jul 2025441 PMAQI
24th Jul 2025462 PMAQI
24th Jul 2025503 PMAQI
24th Jul 2025504 PMAQI
24th Jul 2025475 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025487 PMAQI
24th Jul 2025508 PMAQI
24th Jul 2025429 PMAQI
24th Jul 20254610 PMAQI
24th Jul 20254511 PMAQI
25th Jul 20253812 AMAQI
25th Jul 2025341 AMAQI
25th Jul 2025192 AMAQI
25th Jul 2025183 AMAQI
25th Jul 2025194 AMAQI
30°C25/35°C
25th Jul 2025195 AMAQI
25th Jul 2025196 AMAQI
25th Jul 2025207 AMAQI
25th Jul 2025208 AMAQI
25th Jul 2025199 AMAQI
25th Jul 20252010 AMAQI
25th Jul 20252011 AMAQI
25th Jul 20252112 PMAQI
25th Jul 2025221 PMAQI
25th Jul 2025242 PMAQI
25th Jul 2025243 PMAQI
25th Jul 2025264 PMAQI
25th Jul 2025285 PMAQI
25th Jul 2025286 PMAQI
25th Jul 2025257 PMAQI
25th Jul 2025268 PMAQI
25th Jul 2025329 PMAQI
25th Jul 20253810 PMAQI
25th Jul 20254911 PMAQI
26th Jul 20255412 AMAQI
26th Jul 2025611 AMAQI
26th Jul 2025812 AMAQI
26th Jul 2025763 AMAQI
26th Jul 2025704 AMAQI
26°C23/30°C
26th Jul 2025605 AMAQI
26th Jul 2025506 AMAQI
26th Jul 2025487 AMAQI
26th Jul 2025438 AMAQI
26th Jul 2025409 AMAQI
26th Jul 20253910 AMAQI
26th Jul 20254011 AMAQI
26th Jul 20254012 PMAQI
26th Jul 2025421 PMAQI
26th Jul 2025432 PMAQI
26th Jul 2025463 PMAQI
26th Jul 2025484 PMAQI
26th Jul 2025485 PMAQI
26th Jul 2025486 PMAQI
26th Jul 2025497 PMAQI
26th Jul 2025498 PMAQI
26th Jul 2025469 PMAQI
26th Jul 20254710 PMAQI
26th Jul 20254411 PMAQI
27th Jul 20254412 AMAQI
27th Jul 2025401 AMAQI
27th Jul 2025302 AMAQI
27th Jul 2025293 AMAQI
27th Jul 2025304 AMAQI
27°C23/31°C
27th Jul 2025295 AMAQI
27th Jul 2025306 AMAQI
27th Jul 2025347 AMAQI
27th Jul 2025348 AMAQI
27th Jul 2025329 AMAQI
27th Jul 20253010 AMAQI
27th Jul 20252911 AMAQI
27th Jul 20252612 PMAQI
27th Jul 2025281 PMAQI
27th Jul 2025312 PMAQI
27th Jul 2025333 PMAQI
27th Jul 2025324 PMAQI
27th Jul 2025325 PMAQI
27th Jul 2025326 PMAQI
27th Jul 2025317 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025309 PMAQI
27th Jul 20253210 PMAQI
27th Jul 20253211 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025321 AMAQI
28th Jul 2025342 AMAQI
28th Jul 2025383 AMAQI
28th Jul 2025454 AMAQI
28°C24/35°C
28th Jul 2025465 AMAQI
28th Jul 2025506 AMAQI
28th Jul 2025467 AMAQI
28th Jul 2025478 AMAQI
28th Jul 2025469 AMAQI
28th Jul 20254510 AMAQI
28th Jul 20254511 AMAQI
28th Jul 20254612 PMAQI
28th Jul 2025431 PMAQI
28th Jul 2025422 PMAQI
28th Jul 2025423 PMAQI
28th Jul 2025414 PMAQI
28th Jul 2025385 PMAQI
28th Jul 2025376 PMAQI
28th Jul 2025387 PMAQI
28th Jul 2025388 PMAQI
28th Jul 2025389 PMAQI
28th Jul 20253610 PMAQI
28th Jul 20253811 PMAQI
29th Jul 20253812 AMAQI
29th Jul 2025371 AMAQI
29th Jul 2025342 AMAQI
29th Jul 2025383 AMAQI
29th Jul 2025394 AMAQI
29°C24/35°C
29th Jul 2025415 AMAQI
29th Jul 2025406 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025438 AMAQI
29th Jul 2025449 AMAQI
29th Jul 20254510 AMAQI
29th Jul 20254511 AMAQI
29th Jul 20254412 PMAQI
29th Jul 2025441 PMAQI
29th Jul 2025452 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025444 PMAQI
29th Jul 2025435 PMAQI
29th Jul 2025446 PMAQI
29th Jul 2025437 PMAQI
29th Jul 2025438 PMAQI
29th Jul 2025439 PMAQI
29th Jul 20254410 PMAQI
29th Jul 20254411 PMAQI
30th Jul 20254312 AMAQI
30th Jul 2025441 AMAQI
30th Jul 2025422 AMAQI
30th Jul 2025413 AMAQI
30th Jul 2025414 AMAQI
30°C23/38°C
30th Jul 2025405 AMAQI
30th Jul 2025406 AMAQI
30th Jul 2025437 AMAQI
30th Jul 2025428 AMAQI
30th Jul 2025429 AMAQI
30th Jul 20254210 AMAQI
30th Jul 20254211 AMAQI
30th Jul 20254412 PMAQI
30th Jul 2025481 PMAQI
30th Jul 2025642 PMAQI
30th Jul 2025693 PMAQI
30th Jul 2025694 PMAQI
30th Jul 2025695 PMAQI
30th Jul 2025696 PMAQI
30th Jul 2025697 PMAQI
30th Jul 2025698 PMAQI
30th Jul 2025649 PMAQI
30th Jul 20255710 PMAQI
30th Jul 20255911 PMAQI
31st Jul 20256012 AMAQI
31st Jul 2025631 AMAQI
31st Jul 2025802 AMAQI
31st Jul 2025843 AMAQI
31st Jul 20251124 AMAQI
25°C21/27°C
31st Jul 20251205 AMAQI
31st Jul 20251246 AMAQI
31st Jul 20251277 AMAQI
31st Jul 20251408 AMAQI
31st Jul 20251599 AMAQI
31st Jul 202516610 AMAQI
31st Jul 202516911 AMAQI
31st Jul 202517312 PMAQI
31st Jul 20251781 PMAQI
31st Jul 20251732 PMAQI
31st Jul 20251653 PMAQI
31st Jul 20251664 PMAQI
31st Jul 20251655 PMAQI
31st Jul 20251546 PMAQI
31st Jul 20251457 PMAQI
31st Jul 20251488 PMAQI
31st Jul 20251459 PMAQI
31st Jul 202514010 PMAQI
31st Jul 202513011 PMAQI
1st Aug 202512412 AMAQI
1st Aug 20251091 AMAQI
1st Aug 20251092 AMAQI
1st Aug 20251023 AMAQI
1st Aug 20251064 AMAQI
23°C19/26°C
1st Aug 20251135 AMAQI
1st Aug 20251116 AMAQI
1st Aug 20251107 AMAQI
1st Aug 20251198 AMAQI
1st Aug 20251089 AMAQI
1st Aug 202510610 AMAQI
1st Aug 20259611 AMAQI
1st Aug 20258812 PMAQI
1st Aug 2025861 PMAQI
1st Aug 2025862 PMAQI
1st Aug 2025823 PMAQI
1st Aug 20251004 PMAQI
1st Aug 20251115 PMAQI
1st Aug 2025876 PMAQI
1st Aug 20251027 PMAQI
1st Aug 20251008 PMAQI
1st Aug 2025959 PMAQI
1st Aug 20259710 PMAQI
1st Aug 20259011 PMAQI
2nd Aug 20259412 AMAQI
2nd Aug 2025941 AMAQI
2nd Aug 20251022 AMAQI
2nd Aug 2025973 AMAQI
2nd Aug 2025954 AMAQI
23°C19/27°C
2nd Aug 2025965 AMAQI
2nd Aug 2025986 AMAQI
2nd Aug 2025947 AMAQI
2nd Aug 2025968 AMAQI
2nd Aug 2025969 AMAQI
2nd Aug 20259810 AMAQI
2nd Aug 20259511 AMAQI
2nd Aug 20259112 PMAQI
2nd Aug 2025881 PMAQI
2nd Aug 2025832 PMAQI
2nd Aug 2025793 PMAQI
2nd Aug 2025814 PMAQI
2nd Aug 2025855 PMAQI
2nd Aug 2025876 PMAQI
2nd Aug 2025947 PMAQI
2nd Aug 2025938 PMAQI
2nd Aug 2025889 PMAQI
2nd Aug 20258910 PMAQI
2nd Aug 20259211 PMAQI
3rd Aug 20259612 AMAQI
3rd Aug 2025941 AMAQI
3rd Aug 2025922 AMAQI
3rd Aug 2025913 AMAQI
3rd Aug 2025934 AMAQI
22°C15/29°C
3rd Aug 2025935 AMAQI
3rd Aug 2025966 AMAQI
3rd Aug 2025927 AMAQI
3rd Aug 2025928 AMAQI
3rd Aug 2025969 AMAQI
3rd Aug 20259410 AMAQI
3rd Aug 20259411 AMAQI
3rd Aug 20259112 PMAQI
3rd Aug 2025931 PMAQI
3rd Aug 20251062 PMAQI
3rd Aug 2025953 PMAQI
3rd Aug 2025944 PMAQI
3rd Aug 2025965 PMAQI
3rd Aug 2025986 PMAQI
3rd Aug 2025957 PMAQI
3rd Aug 2025908 PMAQI
3rd Aug 2025949 PMAQI
3rd Aug 202510410 PMAQI
3rd Aug 202510511 PMAQI
4th Aug 202510312 AMAQI
4th Aug 20251071 AMAQI
4th Aug 20251052 AMAQI
4th Aug 20251013 AMAQI
4th Aug 20251104 AMAQI
23°C17/29°C
4th Aug 20251045 AMAQI
4th Aug 20251126 AMAQI
4th Aug 20251067 AMAQI
4th Aug 20251148 AMAQI
4th Aug 20251079 AMAQI
4th Aug 202510010 AMAQI
4th Aug 20259511 AMAQI
4th Aug 20259012 PMAQI
4th Aug 2025881 PMAQI
4th Aug 2025832 PMAQI
4th Aug 2025813 PMAQI
4th Aug 2025844 PMAQI
4th Aug 2025865 PMAQI
4th Aug 2025836 PMAQI
4th Aug 20251067 PMAQI
4th Aug 2025918 PMAQI
4th Aug 2025819 PMAQI
4th Aug 20258410 PMAQI
4th Aug 20258011 PMAQI
5th Aug 20258112 AMAQI
5th Aug 2025861 AMAQI
5th Aug 2025842 AMAQI
5th Aug 2025833 AMAQI
5th Aug 2025864 AMAQI
23°C18/27°C
5th Aug 2025855 AMAQI
5th Aug 2025886 AMAQI
5th Aug 2025917 AMAQI
5th Aug 2025908 AMAQI
5th Aug 2025929 AMAQI
5th Aug 20259610 AMAQI
5th Aug 20259911 AMAQI
5th Aug 20259612 PMAQI
5th Aug 2025981 PMAQI
5th Aug 2025982 PMAQI
5th Aug 2025983 PMAQI
5th Aug 2025974 PMAQI
5th Aug 20251045 PMAQI
5th Aug 20251006 PMAQI
5th Aug 20251027 PMAQI
5th Aug 20251038 PMAQI
5th Aug 20251129 PMAQI
5th Aug 202511410 PMAQI
5th Aug 202511411 PMAQI
6th Aug 202511912 AMAQI
6th Aug 20251191 AMAQI
6th Aug 20251172 AMAQI
6th Aug 20251103 AMAQI
6th Aug 20251124 AMAQI
24°C20/29°C
6th Aug 20251065 AMAQI
5 AM12 PM
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
57AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
57AQI
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. 57), while the lowest AQI was between 12 AM to 11 PM (Avg. 57).
2025 Days Vs Air Quality
Northbrook, Illinois, United States
2025
77%
101
22%
29
2%
2
Total number of days with different AQI categories in last 218 days in 2025 (147 days remaining)
Good
101 DaysModerate
29 DaysPoor
2 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 77%
Health Risk Level:
Low
In 2025, 77% of 218 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
Northbrook, 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 March 2025
44AQI
44AQI
2nd March 2025
41AQI
41AQI
3rd March 2025
25AQI
25AQI
4th March 2025
24AQI
24AQI
5th March 2025
17AQI
17AQI
1st April 2025
17AQI
17AQI
2nd April 2025
33AQI
33AQI
3rd April 2025
22AQI
22AQI
4th April 2025
21AQI
21AQI
5th April 2025
20AQI
20AQI
6th April 2025
22AQI
22AQI
7th April 2025
22AQI
22AQI
8th April 2025
16AQI
16AQI
9th April 2025
30AQI
30AQI
10th April 2025
46AQI
46AQI
11th April 2025
43AQI
43AQI
12th April 2025
50AQI
50AQI
13th April 2025
38AQI
38AQI
14th April 2025
28AQI
28AQI
15th April 2025
18AQI
18AQI
16th April 2025
20AQI
20AQI
17th April 2025
30AQI
30AQI
18th April 2025
49AQI
49AQI
19th April 2025
36AQI
36AQI
20th April 2025
31AQI
31AQI
21st April 2025
19AQI
19AQI
22nd April 2025
23AQI
23AQI
23rd April 2025
26AQI
26AQI
24th April 2025
43AQI
43AQI
25th April 2025
20AQI
20AQI
26th April 2025
17AQI
17AQI
27th April 2025
21AQI
21AQI
28th April 2025
31AQI
31AQI
29th April 2025
30AQI
30AQI
30th April 2025
17AQI
17AQI
1st May 2025
30AQI
30AQI
2nd May 2025
23AQI
23AQI
3rd May 2025
14AQI
14AQI
4th May 2025
15AQI
15AQI
5th May 2025
19AQI
19AQI
6th May 2025
33AQI
33AQI
7th May 2025
32AQI
32AQI
8th May 2025
15AQI
15AQI
9th May 2025
19AQI
19AQI
10th May 2025
26AQI
26AQI
11th May 2025
19AQI
19AQI
12th May 2025
27AQI
27AQI
13th May 2025
32AQI
32AQI
14th May 2025
24AQI
24AQI
15th May 2025
40AQI
40AQI
16th May 2025
30AQI
30AQI
17th May 2025
19AQI
19AQI
18th May 2025
18AQI
18AQI
19th May 2025
16AQI
16AQI
20th May 2025
24AQI
24AQI
21st May 2025
16AQI
16AQI
22nd May 2025
13AQI
13AQI
23rd May 2025
13AQI
13AQI
24th May 2025
13AQI
13AQI
25th May 2025
13AQI
13AQI
26th May 2025
18AQI
18AQI
27th May 2025
22AQI
22AQI
28th May 2025
25AQI
25AQI
29th May 2025
34AQI
34AQI
30th May 2025
43AQI
43AQI
31st May 2025
34AQI
34AQI
1st June 2025
30AQI
30AQI
2nd June 2025
37AQI
37AQI
3rd June 2025
55AQI
55AQI
4th June 2025
58AQI
58AQI
5th June 2025
96AQI
96AQI
6th June 2025
78AQI
78AQI
7th June 2025
77AQI
77AQI
8th June 2025
75AQI
75AQI
9th June 2025
71AQI
71AQI
10th June 2025
59AQI
59AQI
11th June 2025
73AQI
73AQI
12th June 2025
80AQI
80AQI
13th June 2025
70AQI
70AQI
14th June 2025
51AQI
51AQI
15th June 2025
45AQI
45AQI
16th June 2025
52AQI
52AQI
17th June 2025
53AQI
53AQI
18th June 2025
36AQI
36AQI
19th June 2025
30AQI
30AQI
20th June 2025
42AQI
42AQI
21st June 2025
44AQI
44AQI
22nd June 2025
47AQI
47AQI
23rd June 2025
58AQI
58AQI
24th June 2025
31AQI
31AQI
25th June 2025
29AQI
29AQI
26th June 2025
41AQI
41AQI
27th June 2025
26AQI
26AQI
28th June 2025
19AQI
19AQI
29th June 2025
28AQI
28AQI
30th June 2025
28AQI
28AQI
1st July 2025
27AQI
27AQI
2nd July 2025
45AQI
45AQI
3rd July 2025
46AQI
46AQI
4th July 2025
48AQI
48AQI
5th July 2025
80AQI
80AQI
6th July 2025
44AQI
44AQI
7th July 2025
46AQI
46AQI
8th July 2025
56AQI
56AQI
9th July 2025
41AQI
41AQI
10th July 2025
36AQI
36AQI
11th July 2025
31AQI
31AQI
12th July 2025
25AQI
25AQI
13th July 2025
59AQI
59AQI
14th July 2025
77AQI
77AQI
15th July 2025
81AQI
81AQI
16th July 2025
45AQI
45AQI
17th July 2025
19AQI
19AQI
18th July 2025
17AQI
17AQI
19th July 2025
29AQI
29AQI
20th July 2025
25AQI
25AQI
21st July 2025
90AQI
90AQI
22nd July 2025
71AQI
71AQI
23rd July 2025
59AQI
59AQI
24th July 2025
46AQI
46AQI
25th July 2025
26AQI
26AQI
26th July 2025
52AQI
52AQI
27th July 2025
32AQI
32AQI
28th July 2025
40AQI
40AQI
29th July 2025
42AQI
42AQI
30th July 2025
52AQI
52AQI
31st July 2025
133AQI
133AQI
1st August 2025
102AQI
102AQI
2nd August 2025
93AQI
93AQI
3rd August 2025
95AQI
95AQI
4th August 2025
96AQI
96AQI
5th August 2025
87AQI
87AQI
30AQI
28AQI
23AQI
51AQI
49AQI
95AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202540AQI
5
30
31
15
15
20
10
1
4
1
101
29
2
Highest AQI recorded in
August95AQI
Lowest AQI recorded in
May23AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
40AQILeast Polluted Year Recorded
2025(Avg.)
40AQINorthbrook's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
