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
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Aug 2025
102AQILowest AQI recorded on
21st Aug 2025
17AQISame Day Analysis (1st August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 42 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 31st Jul - 1st Aug 2026
Northbrook, Illinois, United States
AQI
Day
Night
.
5 AM31st Jul 2026
8 PM
4 AM1st Aug 2026
Day time
Avg. Highest Time
5AM31st Jul
52AQI
Avg. Lowest Time
7PM31st Jul
29AQI
Night time
Avg. Highest Time
1AM1st Aug
40AQI
Avg. Lowest Time
11PM31st Jul
21AQI
In the last 24 hours,
Northbrook's AQI reached its highest point of 52 at 5 AM during the Day, while the lowest point, 21, was recorded at 11 PM during the Night between 31st Jul and 1st Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Northbrook, Illinois, United States
JulAug
03rd - 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 - 01st01st
Day
Night
3rd Jul 2026105 AMAQI
3rd Jul 2026186 AMAQI
3rd Jul 2026107 AMAQI
3rd Jul 2026128 AMAQI
3rd Jul 2026129 AMAQI
3rd Jul 20261210 AMAQI
3rd Jul 20261511 AMAQI
3rd Jul 20262612 PMAQI
3rd Jul 2026181 PMAQI
3rd Jul 2026222 PMAQI
3rd Jul 2026203 PMAQI
3rd Jul 2026184 PMAQI
3rd Jul 2026175 PMAQI
3rd Jul 2026126 PMAQI
3rd Jul 2026167 PMAQI
3rd Jul 2026188 PMAQI
3rd Jul 2026169 PMAQI
3rd Jul 20262510 PMAQI
3rd Jul 20262911 PMAQI
4th Jul 20262312 AMAQI
4th Jul 2026261 AMAQI
4th Jul 2026422 AMAQI
4th Jul 2026333 AMAQI
4th Jul 2026144 AMAQI
24°C19/31°C
4th Jul 2026145 AMAQI
4th Jul 2026166 AMAQI
4th Jul 2026197 AMAQI
4th Jul 2026478 AMAQI
4th Jul 2026209 AMAQI
4th Jul 20261410 AMAQI
4th Jul 20263811 AMAQI
4th Jul 20261912 PMAQI
4th Jul 2026141 PMAQI
4th Jul 2026252 PMAQI
4th Jul 2026403 PMAQI
4th Jul 2026194 PMAQI
4th Jul 2026395 PMAQI
4th Jul 2026166 PMAQI
4th Jul 2026167 PMAQI
4th Jul 2026178 PMAQI
4th Jul 2026259 PMAQI
4th Jul 20262510 PMAQI
4th Jul 20268611 PMAQI
5th Jul 20266612 AMAQI
5th Jul 2026441 AMAQI
5th Jul 2026462 AMAQI
5th Jul 2026443 AMAQI
5th Jul 2026464 AMAQI
21°C17/24°C
5th Jul 2026335 AMAQI
5th Jul 2026516 AMAQI
5th Jul 2026257 AMAQI
5th Jul 2026468 AMAQI
5th Jul 2026449 AMAQI
5th Jul 20264510 AMAQI
5th Jul 20264011 AMAQI
5th Jul 20262612 PMAQI
5th Jul 2026561 PMAQI
5th Jul 2026482 PMAQI
5th Jul 2026583 PMAQI
5th Jul 2026504 PMAQI
5th Jul 2026525 PMAQI
5th Jul 2026506 PMAQI
5th Jul 2026507 PMAQI
5th Jul 2026448 PMAQI
5th Jul 2026269 PMAQI
5th Jul 20263310 PMAQI
5th Jul 20263311 PMAQI
6th Jul 20262912 AMAQI
6th Jul 2026251 AMAQI
6th Jul 2026462 AMAQI
6th Jul 2026453 AMAQI
6th Jul 2026464 AMAQI
20°C19/23°C
6th Jul 2026525 AMAQI
6th Jul 2026256 AMAQI
6th Jul 2026477 AMAQI
6th Jul 2026428 AMAQI
6th Jul 2026429 AMAQI
6th Jul 20262510 AMAQI
6th Jul 20264211 AMAQI
6th Jul 20264212 PMAQI
6th Jul 2026451 PMAQI
6th Jul 2026422 PMAQI
6th Jul 2026423 PMAQI
6th Jul 2026404 PMAQI
6th Jul 2026385 PMAQI
6th Jul 2026366 PMAQI
6th Jul 2026217 PMAQI
6th Jul 2026328 PMAQI
6th Jul 2026329 PMAQI
6th Jul 20263410 PMAQI
6th Jul 20264011 PMAQI
7th Jul 20262912 AMAQI
7th Jul 2026381 AMAQI
7th Jul 2026542 AMAQI
7th Jul 2026313 AMAQI
7th Jul 2026234 AMAQI
21°C19/25°C
7th Jul 2026425 AMAQI
7th Jul 2026406 AMAQI
7th Jul 2026367 AMAQI
7th Jul 2026338 AMAQI
7th Jul 2026339 AMAQI
7th Jul 20263310 AMAQI
7th Jul 20263111 AMAQI
7th Jul 20263312 PMAQI
7th Jul 2026381 PMAQI
7th Jul 2026382 PMAQI
7th Jul 2026333 PMAQI
7th Jul 2026384 PMAQI
7th Jul 2026425 PMAQI
7th Jul 2026336 PMAQI
7th Jul 2026337 PMAQI
7th Jul 2026388 PMAQI
7th Jul 2026409 PMAQI
7th Jul 20264010 PMAQI
7th Jul 20262811 PMAQI
8th Jul 20264212 AMAQI
8th Jul 2026461 AMAQI
8th Jul 2026422 AMAQI
8th Jul 2026423 AMAQI
8th Jul 2026294 AMAQI
22°C18/27°C
8th Jul 2026425 AMAQI
8th Jul 2026426 AMAQI
8th Jul 2026427 AMAQI
8th Jul 2026428 AMAQI
8th Jul 2026389 AMAQI
8th Jul 20263010 AMAQI
8th Jul 20263311 AMAQI
8th Jul 20262912 PMAQI
8th Jul 2026331 PMAQI
8th Jul 2026292 PMAQI
8th Jul 2026253 PMAQI
8th Jul 2026404 PMAQI
8th Jul 2026405 PMAQI
8th Jul 2026336 PMAQI
8th Jul 2026337 PMAQI
8th Jul 2026338 PMAQI
8th Jul 2026339 PMAQI
8th Jul 20263310 PMAQI
8th Jul 20263811 PMAQI
9th Jul 20263312 AMAQI
9th Jul 2026421 AMAQI
9th Jul 2026422 AMAQI
9th Jul 2026413 AMAQI
9th Jul 2026254 AMAQI
25°C19/32°C
9th Jul 2026175 AMAQI
9th Jul 2026256 AMAQI
9th Jul 2026367 AMAQI
9th Jul 2026308 AMAQI
9th Jul 2026359 AMAQI
9th Jul 20263010 AMAQI
9th Jul 20262211 AMAQI
9th Jul 20262112 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026222 PMAQI
9th Jul 2026223 PMAQI
9th Jul 2026214 PMAQI
9th Jul 2026205 PMAQI
9th Jul 2026216 PMAQI
9th Jul 2026197 PMAQI
9th Jul 2026178 PMAQI
9th Jul 2026219 PMAQI
9th Jul 20261710 PMAQI
9th Jul 20261211 PMAQI
10th Jul 20261412 AMAQI
10th Jul 2026141 AMAQI
10th Jul 2026172 AMAQI
10th Jul 202693 AMAQI
10th Jul 2026344 AMAQI
25°C21/32°C
10th Jul 2026345 AMAQI
10th Jul 2026406 AMAQI
10th Jul 2026217 AMAQI
10th Jul 2026328 AMAQI
10th Jul 2026219 AMAQI
10th Jul 20261310 AMAQI
10th Jul 20261711 AMAQI
10th Jul 20261712 PMAQI
10th Jul 2026171 PMAQI
10th Jul 2026212 PMAQI
10th Jul 2026213 PMAQI
10th Jul 2026214 PMAQI
10th Jul 2026345 PMAQI
10th Jul 2026296 PMAQI
10th Jul 2026297 PMAQI
10th Jul 2026188 PMAQI
10th Jul 2026209 PMAQI
10th Jul 20263310 PMAQI
10th Jul 20262911 PMAQI
11th Jul 20264012 AMAQI
11th Jul 2026281 AMAQI
11th Jul 2026272 AMAQI
11th Jul 2026703 AMAQI
11th Jul 2026564 AMAQI
23°C20/27°C
11th Jul 2026545 AMAQI
11th Jul 2026466 AMAQI
11th Jul 2026467 AMAQI
11th Jul 2026428 AMAQI
11th Jul 2026429 AMAQI
11th Jul 20264210 AMAQI
11th Jul 20263011 AMAQI
11th Jul 20264212 PMAQI
11th Jul 2026381 PMAQI
11th Jul 2026162 PMAQI
11th Jul 2026173 PMAQI
11th Jul 2026214 PMAQI
11th Jul 2026255 PMAQI
11th Jul 2026146 PMAQI
11th Jul 2026267 PMAQI
11th Jul 2026388 PMAQI
11th Jul 2026409 PMAQI
11th Jul 20264810 PMAQI
11th Jul 20262011 PMAQI
12th Jul 20264212 AMAQI
12th Jul 2026331 AMAQI
12th Jul 2026232 AMAQI
12th Jul 2026373 AMAQI
12th Jul 2026284 AMAQI
24°C21/28°C
12th Jul 2026425 AMAQI
12th Jul 2026426 AMAQI
12th Jul 2026387 AMAQI
12th Jul 2026328 AMAQI
12th Jul 2026389 AMAQI
12th Jul 20265410 AMAQI
12th Jul 20264911 AMAQI
12th Jul 20264712 PMAQI
12th Jul 2026381 PMAQI
12th Jul 2026282 PMAQI
12th Jul 2026383 PMAQI
12th Jul 2026494 PMAQI
12th Jul 2026505 PMAQI
12th Jul 2026426 PMAQI
12th Jul 2026387 PMAQI
12th Jul 2026368 PMAQI
12th Jul 2026389 PMAQI
12th Jul 20264210 PMAQI
12th Jul 20264211 PMAQI
13th Jul 20265012 AMAQI
13th Jul 2026441 AMAQI
13th Jul 2026462 AMAQI
13th Jul 2026463 AMAQI
13th Jul 2026464 AMAQI
25°C22/29°C
13th Jul 2026465 AMAQI
13th Jul 2026526 AMAQI
13th Jul 2026347 AMAQI
13th Jul 2026358 AMAQI
13th Jul 2026329 AMAQI
13th Jul 20265310 AMAQI
13th Jul 20264411 AMAQI
13th Jul 20264812 PMAQI
13th Jul 2026261 PMAQI
13th Jul 2026382 PMAQI
13th Jul 2026293 PMAQI
13th Jul 2026334 PMAQI
13th Jul 2026335 PMAQI
13th Jul 2026386 PMAQI
13th Jul 2026467 PMAQI
13th Jul 2026428 PMAQI
13th Jul 2026429 PMAQI
13th Jul 20264510 PMAQI
13th Jul 20263811 PMAQI
14th Jul 20263312 AMAQI
14th Jul 2026501 AMAQI
14th Jul 2026522 AMAQI
14th Jul 2026503 AMAQI
14th Jul 2026504 AMAQI
27°C20/32°C
14th Jul 2026385 AMAQI
14th Jul 2026226 AMAQI
14th Jul 2026297 AMAQI
14th Jul 2026388 AMAQI
14th Jul 2026319 AMAQI
14th Jul 20262610 AMAQI
14th Jul 20262811 AMAQI
14th Jul 20264112 PMAQI
14th Jul 2026271 PMAQI
14th Jul 2026342 PMAQI
14th Jul 2026243 PMAQI
14th Jul 2026304 PMAQI
14th Jul 2026285 PMAQI
14th Jul 2026366 PMAQI
14th Jul 2026347 PMAQI
14th Jul 2026208 PMAQI
14th Jul 2026199 PMAQI
14th Jul 20262210 PMAQI
14th Jul 20262011 PMAQI
15th Jul 20262112 AMAQI
15th Jul 2026401 AMAQI
15th Jul 2026942 AMAQI
15th Jul 2026423 AMAQI
15th Jul 2026254 AMAQI
29°C23/33°C
15th Jul 2026295 AMAQI
15th Jul 2026296 AMAQI
15th Jul 2026867 AMAQI
15th Jul 2026298 AMAQI
15th Jul 2026499 AMAQI
15th Jul 20264210 AMAQI
15th Jul 20264411 AMAQI
15th Jul 20264512 PMAQI
15th Jul 2026401 PMAQI
15th Jul 2026512 PMAQI
15th Jul 2026443 PMAQI
15th Jul 2026424 PMAQI
15th Jul 2026295 PMAQI
15th Jul 2026406 PMAQI
15th Jul 2026427 PMAQI
15th Jul 2026408 PMAQI
15th Jul 2026729 PMAQI
15th Jul 202610210 PMAQI
15th Jul 202610411 PMAQI
16th Jul 202611812 AMAQI
16th Jul 2026521 AMAQI
16th Jul 2026682 AMAQI
16th Jul 2026543 AMAQI
16th Jul 20261064 AMAQI
28°C24/34°C
16th Jul 20261155 AMAQI
16th Jul 20262096 AMAQI
16th Jul 20261777 AMAQI
16th Jul 20262088 AMAQI
16th Jul 2026309 AMAQI
16th Jul 20263110 AMAQI
16th Jul 20262811 AMAQI
16th Jul 202625312 PMAQI
16th Jul 2026321 PMAQI
16th Jul 20261362 PMAQI
16th Jul 20261143 PMAQI
16th Jul 2026994 PMAQI
16th Jul 20261305 PMAQI
16th Jul 2026546 PMAQI
16th Jul 20261087 PMAQI
16th Jul 2026308 PMAQI
16th Jul 2026289 PMAQI
16th Jul 20269110 PMAQI
16th Jul 20269811 PMAQI
17th Jul 202610612 AMAQI
17th Jul 2026941 AMAQI
17th Jul 20261742 AMAQI
17th Jul 20262473 AMAQI
17th Jul 20263144 AMAQI
26°C25/30°C
17th Jul 20263625 AMAQI
17th Jul 20263756 AMAQI
17th Jul 20263687 AMAQI
17th Jul 20263328 AMAQI
17th Jul 20263769 AMAQI
17th Jul 202631210 AMAQI
17th Jul 202627811 AMAQI
17th Jul 202630012 PMAQI
17th Jul 2026741 PMAQI
17th Jul 20261752 PMAQI
17th Jul 20261603 PMAQI
17th Jul 20261504 PMAQI
17th Jul 20261085 PMAQI
17th Jul 2026856 PMAQI
17th Jul 2026727 PMAQI
17th Jul 2026688 PMAQI
17th Jul 2026609 PMAQI
17th Jul 20265410 PMAQI
17th Jul 20265311 PMAQI
18th Jul 20265212 AMAQI
18th Jul 2026511 AMAQI
18th Jul 2026512 AMAQI
18th Jul 2026483 AMAQI
18th Jul 2026494 AMAQI
28°C24/34°C
18th Jul 2026525 AMAQI
18th Jul 2026486 AMAQI
18th Jul 2026467 AMAQI
18th Jul 2026488 AMAQI
18th Jul 2026509 AMAQI
18th Jul 20264410 AMAQI
18th Jul 20264811 AMAQI
18th Jul 20264612 PMAQI
18th Jul 2026421 PMAQI
18th Jul 2026422 PMAQI
18th Jul 2026443 PMAQI
18th Jul 2026504 PMAQI
18th Jul 2026495 PMAQI
18th Jul 2026686 PMAQI
18th Jul 2026927 PMAQI
18th Jul 20261308 PMAQI
18th Jul 20261529 PMAQI
18th Jul 202616110 PMAQI
18th Jul 202616411 PMAQI
19th Jul 202617612 AMAQI
19th Jul 20261761 AMAQI
19th Jul 20261752 AMAQI
19th Jul 20261703 AMAQI
19th Jul 20261544 AMAQI
27°C24/33°C
19th Jul 20261475 AMAQI
19th Jul 20261416 AMAQI
19th Jul 20261357 AMAQI
19th Jul 20261358 AMAQI
19th Jul 20261399 AMAQI
19th Jul 202613010 AMAQI
19th Jul 202612811 AMAQI
19th Jul 202612012 PMAQI
19th Jul 20261161 PMAQI
19th Jul 20261102 PMAQI
19th Jul 20261153 PMAQI
19th Jul 20261164 PMAQI
19th Jul 20261255 PMAQI
19th Jul 20261226 PMAQI
19th Jul 20261297 PMAQI
19th Jul 20261258 PMAQI
19th Jul 20261349 PMAQI
19th Jul 202613010 PMAQI
19th Jul 202613511 PMAQI
20th Jul 202613912 AMAQI
20th Jul 20261401 AMAQI
20th Jul 20261362 AMAQI
20th Jul 20261443 AMAQI
20th Jul 20261474 AMAQI
23°C21/27°C
20th Jul 20261385 AMAQI
20th Jul 20261446 AMAQI
20th Jul 20261367 AMAQI
20th Jul 20261428 AMAQI
20th Jul 20261389 AMAQI
20th Jul 202613810 AMAQI
20th Jul 202613011 AMAQI
20th Jul 202612612 PMAQI
20th Jul 20261181 PMAQI
20th Jul 20261242 PMAQI
20th Jul 20261253 PMAQI
20th Jul 20261224 PMAQI
20th Jul 20261225 PMAQI
20th Jul 20261226 PMAQI
20th Jul 20261207 PMAQI
20th Jul 20261208 PMAQI
20th Jul 20261209 PMAQI
20th Jul 202611111 PMAQI
21st Jul 202611212 AMAQI
21st Jul 20261021 AMAQI
21st Jul 2026882 AMAQI
21st Jul 2026783 AMAQI
21st Jul 2026654 AMAQI
25°C18/31°C
21st Jul 2026515 AMAQI
21st Jul 2026466 AMAQI
21st Jul 2026277 AMAQI
21st Jul 2026468 AMAQI
21st Jul 2026349 AMAQI
21st Jul 20262910 AMAQI
21st Jul 20264811 AMAQI
21st Jul 20265312 PMAQI
21st Jul 2026551 PMAQI
21st Jul 2026562 PMAQI
21st Jul 2026533 PMAQI
21st Jul 2026484 PMAQI
21st Jul 2026425 PMAQI
21st Jul 2026256 PMAQI
21st Jul 2026277 PMAQI
21st Jul 2026468 PMAQI
21st Jul 2026349 PMAQI
21st Jul 20263810 PMAQI
21st Jul 20263611 PMAQI
22nd Jul 20263812 AMAQI
22nd Jul 2026341 AMAQI
22nd Jul 2026462 AMAQI
22nd Jul 2026383 AMAQI
22nd Jul 2026424 AMAQI
26°C21/31°C
22nd Jul 2026525 AMAQI
22nd Jul 2026406 AMAQI
22nd Jul 2026337 AMAQI
22nd Jul 2026268 AMAQI
22nd Jul 2026289 AMAQI
22nd Jul 20262010 AMAQI
22nd Jul 20262311 AMAQI
22nd Jul 20262412 PMAQI
22nd Jul 2026161 PMAQI
22nd Jul 2026222 PMAQI
22nd Jul 2026213 PMAQI
22nd Jul 2026244 PMAQI
22nd Jul 2026255 PMAQI
22nd Jul 2026266 PMAQI
22nd Jul 2026297 PMAQI
22nd Jul 2026758 PMAQI
22nd Jul 2026649 PMAQI
22nd Jul 20264810 PMAQI
22nd Jul 20263311 PMAQI
23rd Jul 20263612 AMAQI
23rd Jul 2026541 AMAQI
23rd Jul 2026462 AMAQI
23rd Jul 2026363 AMAQI
23rd Jul 2026304 AMAQI
20°C17/24°C
23rd Jul 2026465 AMAQI
23rd Jul 2026386 AMAQI
23rd Jul 2026387 AMAQI
23rd Jul 2026408 AMAQI
23rd Jul 2026469 AMAQI
23rd Jul 20264010 AMAQI
23rd Jul 20264611 AMAQI
23rd Jul 20264412 PMAQI
23rd Jul 2026491 PMAQI
23rd Jul 2026402 PMAQI
23rd Jul 2026403 PMAQI
23rd Jul 2026384 PMAQI
23rd Jul 2026345 PMAQI
23rd Jul 2026216 PMAQI
23rd Jul 2026387 PMAQI
23rd Jul 2026328 PMAQI
23rd Jul 2026259 PMAQI
23rd Jul 20262510 PMAQI
23rd Jul 20264011 PMAQI
24th Jul 20264012 AMAQI
24th Jul 2026441 AMAQI
24th Jul 2026422 AMAQI
24th Jul 2026493 AMAQI
24th Jul 2026484 AMAQI
21°C15/26°C
24th Jul 2026485 AMAQI
24th Jul 2026486 AMAQI
24th Jul 2026487 AMAQI
24th Jul 2026508 AMAQI
24th Jul 2026509 AMAQI
24th Jul 20264910 AMAQI
24th Jul 20264811 AMAQI
24th Jul 20264212 PMAQI
24th Jul 2026511 PMAQI
24th Jul 2026482 PMAQI
24th Jul 2026293 PMAQI
24th Jul 2026294 PMAQI
24th Jul 2026385 PMAQI
24th Jul 2026346 PMAQI
24th Jul 2026277 PMAQI
24th Jul 2026278 PMAQI
24th Jul 2026339 PMAQI
24th Jul 20263310 PMAQI
24th Jul 20262711 PMAQI
25th Jul 20264612 AMAQI
25th Jul 2026381 AMAQI
25th Jul 2026442 AMAQI
25th Jul 2026423 AMAQI
25th Jul 2026424 AMAQI
22°C17/26°C
25th Jul 2026445 AMAQI
25th Jul 2026466 AMAQI
25th Jul 2026387 AMAQI
25th Jul 2026488 AMAQI
25th Jul 2026479 AMAQI
25th Jul 20263010 AMAQI
25th Jul 20262111 AMAQI
25th Jul 20263312 PMAQI
25th Jul 2026381 PMAQI
25th Jul 2026422 PMAQI
25th Jul 2026423 PMAQI
25th Jul 2026444 PMAQI
25th Jul 2026465 PMAQI
25th Jul 2026446 PMAQI
25th Jul 2026507 PMAQI
25th Jul 2026488 PMAQI
25th Jul 2026489 PMAQI
25th Jul 20265010 PMAQI
25th Jul 20265111 PMAQI
26th Jul 20265012 AMAQI
26th Jul 2026511 AMAQI
26th Jul 2026462 AMAQI
26th Jul 2026463 AMAQI
26th Jul 2026484 AMAQI
22°C17/27°C
26th Jul 2026485 AMAQI
26th Jul 2026516 AMAQI
26th Jul 2026487 AMAQI
26th Jul 2026508 AMAQI
26th Jul 2026519 AMAQI
26th Jul 20264610 AMAQI
26th Jul 20265111 AMAQI
26th Jul 20265012 PMAQI
26th Jul 2026531 PMAQI
26th Jul 2026572 PMAQI
26th Jul 2026583 PMAQI
26th Jul 2026604 PMAQI
26th Jul 2026605 PMAQI
26th Jul 2026606 PMAQI
26th Jul 2026587 PMAQI
26th Jul 2026578 PMAQI
26th Jul 2026589 PMAQI
26th Jul 20266010 PMAQI
26th Jul 20265711 PMAQI
27th Jul 20265712 AMAQI
27th Jul 2026581 AMAQI
27th Jul 2026582 AMAQI
27th Jul 2026543 AMAQI
27th Jul 2026584 AMAQI
25°C21/30°C
27th Jul 2026575 AMAQI
27th Jul 2026576 AMAQI
27th Jul 2026627 AMAQI
27th Jul 2026638 AMAQI
27th Jul 2026659 AMAQI
27th Jul 20266610 AMAQI
27th Jul 20266711 AMAQI
27th Jul 20266212 PMAQI
27th Jul 2026631 PMAQI
27th Jul 2026532 PMAQI
27th Jul 2026503 PMAQI
27th Jul 2026364 PMAQI
27th Jul 2026345 PMAQI
27th Jul 2026296 PMAQI
27th Jul 2026367 PMAQI
27th Jul 2026408 PMAQI
27th Jul 2026469 PMAQI
27th Jul 20264810 PMAQI
27th Jul 20264211 PMAQI
28th Jul 20264412 AMAQI
28th Jul 2026461 AMAQI
28th Jul 2026482 AMAQI
28th Jul 2026443 AMAQI
28th Jul 2026464 AMAQI
24°C21/31°C
28th Jul 2026465 AMAQI
28th Jul 2026486 AMAQI
28th Jul 2026467 AMAQI
28th Jul 2026428 AMAQI
28th Jul 2026449 AMAQI
28th Jul 20265110 AMAQI
28th Jul 20265011 AMAQI
28th Jul 20265112 PMAQI
28th Jul 2026521 PMAQI
28th Jul 2026532 PMAQI
28th Jul 2026513 PMAQI
28th Jul 2026464 PMAQI
28th Jul 2026425 PMAQI
28th Jul 2026466 PMAQI
28th Jul 2026407 PMAQI
28th Jul 2026388 PMAQI
28th Jul 2026369 PMAQI
28th Jul 20262510 PMAQI
28th Jul 20262711 PMAQI
29th Jul 20263812 AMAQI
29th Jul 2026421 AMAQI
29th Jul 2026362 AMAQI
29th Jul 2026363 AMAQI
29th Jul 2026244 AMAQI
20°C17/24°C
29th Jul 2026365 AMAQI
29th Jul 2026386 AMAQI
29th Jul 2026407 AMAQI
29th Jul 2026278 AMAQI
29th Jul 2026299 AMAQI
29th Jul 20263010 AMAQI
29th Jul 20263811 AMAQI
29th Jul 20262512 PMAQI
29th Jul 2026311 PMAQI
29th Jul 2026382 PMAQI
29th Jul 2026333 PMAQI
29th Jul 2026344 PMAQI
29th Jul 2026265 PMAQI
29th Jul 2026426 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026218 PMAQI
29th Jul 2026469 PMAQI
29th Jul 20264410 PMAQI
29th Jul 20263211 PMAQI
30th Jul 20264612 AMAQI
30th Jul 2026251 AMAQI
30th Jul 2026272 AMAQI
30th Jul 2026483 AMAQI
30th Jul 2026524 AMAQI
21°C17/26°C
30th Jul 2026475 AMAQI
30th Jul 2026326 AMAQI
30th Jul 2026347 AMAQI
30th Jul 2026428 AMAQI
30th Jul 2026469 AMAQI
30th Jul 20263810 AMAQI
30th Jul 20264611 AMAQI
30th Jul 20263812 PMAQI
30th Jul 2026321 PMAQI
30th Jul 2026362 PMAQI
30th Jul 2026363 PMAQI
30th Jul 2026404 PMAQI
30th Jul 2026405 PMAQI
30th Jul 2026406 PMAQI
30th Jul 2026447 PMAQI
30th Jul 2026428 PMAQI
30th Jul 2026449 PMAQI
30th Jul 20264910 PMAQI
30th Jul 20265211 PMAQI
31st Jul 20265212 AMAQI
31st Jul 2026481 AMAQI
31st Jul 2026462 AMAQI
31st Jul 2026483 AMAQI
31st Jul 2026484 AMAQI
23°C16/30°C
31st Jul 2026525 AMAQI
31st Jul 2026506 AMAQI
31st Jul 2026467 AMAQI
31st Jul 2026488 AMAQI
31st Jul 2026469 AMAQI
31st Jul 20264210 AMAQI
31st Jul 20264611 AMAQI
31st Jul 20264612 PMAQI
31st Jul 2026461 PMAQI
31st Jul 2026442 PMAQI
31st Jul 2026403 PMAQI
31st Jul 2026424 PMAQI
31st Jul 2026405 PMAQI
31st Jul 2026386 PMAQI
31st Jul 2026297 PMAQI
31st Jul 2026348 PMAQI
31st Jul 2026239 PMAQI
31st Jul 20263610 PMAQI
31st Jul 20262111 PMAQI
1st Aug 20262512 AMAQI
1st Aug 2026401 AMAQI
1st Aug 2026252 AMAQI
1st Aug 2026313 AMAQI
1st Aug 2026364 AMAQI
23°C19/29°C
1st Aug 2026405 AMAQI
5 AM1st Aug 2026426 AMAQI
1st Aug 2026407 AMAQI
1st Aug 2026428 AMAQI
1st Aug 2026489 AMAQI
1st Aug 20264210 AMAQI
1st Aug 20264211 AMAQI
1st Aug 20264412 PMAQI
12 PM1st Aug 2026441 PMAQI
1st Aug 2026482 PMAQI
1st Aug 2026483 PMAQI
1st Aug 2026464 PMAQI
1st Aug 2026465 PMAQI
1st Aug 2026466 PMAQI
1st Aug 2026447 PMAQI
1st Aug 2026428 PMAQI
8 PM1st Aug 2026449 PMAQI
1st Aug 20264610 PMAQI
1st Aug 20264811 PMAQI
12 AM
4 AM
21°C20/22°C
Day time
Avg. Highest Time
6 AM
63AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
6 PM
43AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 6 AM (Avg. 63), while the lowest AQI was between 6 PM to 6 PM (Avg. 43).
Night time
Avg. Highest Time
2 AM - 4 AM
57AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
9 PM
47AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 4 AM (Avg. 57), while the lowest AQI was between 9 PM to 9 PM (Avg. 47).
2026 Days Vs Air Quality
Northbrook, Illinois, United States
2026
93%
195
6%
12
0.9%
2
0.4%
1
Total number of days with different AQI categories in last 213 days in 2026 (152 days remaining)
Good
195 DaysModerate
12 DaysPoor
2 DaysUnhealthy
1 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2026, 93% of 213 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Northbrook, Illinois, United States
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
15AQI (US)
15AQI (US)
2nd January 2026
20AQI (US)
20AQI (US)
3rd January 2026
20AQI (US)
20AQI (US)
4th January 2026
25AQI (US)
25AQI (US)
5th January 2026
41AQI (US)
41AQI (US)
6th January 2026
68AQI (US)
68AQI (US)
7th January 2026
48AQI (US)
48AQI (US)
8th January 2026
41AQI (US)
41AQI (US)
9th January 2026
16AQI (US)
16AQI (US)
10th January 2026
24AQI (US)
24AQI (US)
11th January 2026
19AQI (US)
19AQI (US)
12th January 2026
18AQI (US)
18AQI (US)
13th January 2026
21AQI (US)
21AQI (US)
14th January 2026
8AQI (US)
8AQI (US)
15th January 2026
9AQI (US)
9AQI (US)
16th January 2026
19AQI (US)
19AQI (US)
17th January 2026
14AQI (US)
14AQI (US)
18th January 2026
14AQI (US)
14AQI (US)
19th January 2026
16AQI (US)
16AQI (US)
20th January 2026
21AQI (US)
21AQI (US)
21st January 2026
28AQI (US)
28AQI (US)
22nd January 2026
43AQI (US)
43AQI (US)
23rd January 2026
45AQI (US)
45AQI (US)
24th January 2026
35AQI (US)
35AQI (US)
25th January 2026
47AQI (US)
47AQI (US)
26th January 2026
43AQI (US)
43AQI (US)
27th January 2026
26AQI (US)
26AQI (US)
28th January 2026
29AQI (US)
29AQI (US)
29th January 2026
37AQI (US)
37AQI (US)
30th January 2026
53AQI (US)
53AQI (US)
31st January 2026
41AQI (US)
41AQI (US)
1st February 2026
43AQI (US)
43AQI (US)
2nd February 2026
41AQI (US)
41AQI (US)
3rd February 2026
42AQI (US)
42AQI (US)
4th February 2026
35AQI (US)
35AQI (US)
5th February 2026
48AQI (US)
48AQI (US)
6th February 2026
40AQI (US)
40AQI (US)
7th February 2026
37AQI (US)
37AQI (US)
8th February 2026
41AQI (US)
41AQI (US)
9th February 2026
45AQI (US)
45AQI (US)
10th February 2026
38AQI (US)
38AQI (US)
11th February 2026
33AQI (US)
33AQI (US)
12th February 2026
29AQI (US)
29AQI (US)
13th February 2026
36AQI (US)
36AQI (US)
14th February 2026
42AQI (US)
42AQI (US)
15th February 2026
45AQI (US)
45AQI (US)
16th February 2026
41AQI (US)
41AQI (US)
17th February 2026
41AQI (US)
41AQI (US)
18th February 2026
39AQI (US)
39AQI (US)
19th February 2026
33AQI (US)
33AQI (US)
20th February 2026
35AQI (US)
35AQI (US)
21st February 2026
35AQI (US)
35AQI (US)
22nd February 2026
36AQI (US)
36AQI (US)
23rd February 2026
38AQI (US)
38AQI (US)
24th February 2026
35AQI (US)
35AQI (US)
25th February 2026
28AQI (US)
28AQI (US)
26th February 2026
28AQI (US)
28AQI (US)
27th February 2026
29AQI (US)
29AQI (US)
28th February 2026
33AQI (US)
33AQI (US)
1st March 2026
38AQI (US)
38AQI (US)
2nd March 2026
55AQI (US)
55AQI (US)
3rd March 2026
32AQI (US)
32AQI (US)
4th March 2026
39AQI (US)
39AQI (US)
5th March 2026
37AQI (US)
37AQI (US)
6th March 2026
28AQI (US)
28AQI (US)
7th March 2026
37AQI (US)
37AQI (US)
8th March 2026
40AQI (US)
40AQI (US)
9th March 2026
32AQI (US)
32AQI (US)
10th March 2026
32AQI (US)
32AQI (US)
11th March 2026
41AQI (US)
41AQI (US)
12th March 2026
38AQI (US)
38AQI (US)
13th March 2026
37AQI (US)
37AQI (US)
14th March 2026
36AQI (US)
36AQI (US)
15th March 2026
27AQI (US)
27AQI (US)
16th March 2026
37AQI (US)
37AQI (US)
17th March 2026
34AQI (US)
34AQI (US)
18th March 2026
28AQI (US)
28AQI (US)
19th March 2026
37AQI (US)
37AQI (US)
20th March 2026
39AQI (US)
39AQI (US)
21st March 2026
34AQI (US)
34AQI (US)
22nd March 2026
32AQI (US)
32AQI (US)
23rd March 2026
38AQI (US)
38AQI (US)
24th March 2026
28AQI (US)
28AQI (US)
25th March 2026
28AQI (US)
28AQI (US)
26th March 2026
31AQI (US)
31AQI (US)
27th March 2026
29AQI (US)
29AQI (US)
28th March 2026
28AQI (US)
28AQI (US)
29th March 2026
23AQI (US)
23AQI (US)
30th March 2026
25AQI (US)
25AQI (US)
31st March 2026
25AQI (US)
25AQI (US)
1st April 2026
29AQI (US)
29AQI (US)
2nd April 2026
23AQI (US)
23AQI (US)
3rd April 2026
28AQI (US)
28AQI (US)
4th April 2026
30AQI (US)
30AQI (US)
5th April 2026
30AQI (US)
30AQI (US)
6th April 2026
31AQI (US)
31AQI (US)
7th April 2026
27AQI (US)
27AQI (US)
8th April 2026
30AQI (US)
30AQI (US)
9th April 2026
21AQI (US)
21AQI (US)
10th April 2026
32AQI (US)
32AQI (US)
11th April 2026
28AQI (US)
28AQI (US)
12th April 2026
24AQI (US)
24AQI (US)
13th April 2026
23AQI (US)
23AQI (US)
14th April 2026
26AQI (US)
26AQI (US)
15th April 2026
28AQI (US)
28AQI (US)
16th April 2026
28AQI (US)
28AQI (US)
17th April 2026
18th April 2026
27AQI (US)
27AQI (US)
19th April 2026
33AQI (US)
33AQI (US)
20th April 2026
27AQI (US)
27AQI (US)
21st April 2026
18AQI (US)
18AQI (US)
22nd April 2026
23rd April 2026
23AQI (US)
23AQI (US)
24th April 2026
22AQI (US)
22AQI (US)
25th April 2026
27AQI (US)
27AQI (US)
26th April 2026
33AQI (US)
33AQI (US)
27th April 2026
18AQI (US)
18AQI (US)
28th April 2026
24AQI (US)
24AQI (US)
29th April 2026
24AQI (US)
24AQI (US)
30th April 2026
26AQI (US)
26AQI (US)
1st May 2026
24AQI (US)
24AQI (US)
2nd May 2026
24AQI (US)
24AQI (US)
3rd May 2026
19AQI (US)
19AQI (US)
4th May 2026
33AQI (US)
33AQI (US)
5th May 2026
36AQI (US)
36AQI (US)
6th May 2026
27AQI (US)
27AQI (US)
7th May 2026
24AQI (US)
24AQI (US)
8th May 2026
28AQI (US)
28AQI (US)
9th May 2026
10th May 2026
30AQI (US)
30AQI (US)
11th May 2026
29AQI (US)
29AQI (US)
12th May 2026
22AQI (US)
22AQI (US)
13th May 2026
25AQI (US)
25AQI (US)
14th May 2026
24AQI (US)
24AQI (US)
15th May 2026
34AQI (US)
34AQI (US)
16th May 2026
47AQI (US)
47AQI (US)
17th May 2026
44AQI (US)
44AQI (US)
18th May 2026
54AQI (US)
54AQI (US)
19th May 2026
52AQI (US)
52AQI (US)
20th May 2026
50AQI (US)
50AQI (US)
21st May 2026
42AQI (US)
42AQI (US)
22nd May 2026
41AQI (US)
41AQI (US)
23rd May 2026
38AQI (US)
38AQI (US)
24th May 2026
40AQI (US)
40AQI (US)
25th May 2026
40AQI (US)
40AQI (US)
26th May 2026
25AQI (US)
25AQI (US)
27th May 2026
17AQI (US)
17AQI (US)
28th May 2026
14AQI (US)
14AQI (US)
29th May 2026
19AQI (US)
19AQI (US)
30th May 2026
20AQI (US)
20AQI (US)
31st May 2026
23AQI (US)
23AQI (US)
1st June 2026
29AQI (US)
29AQI (US)
2nd June 2026
14AQI (US)
14AQI (US)
3rd June 2026
21AQI (US)
21AQI (US)
4th June 2026
27AQI (US)
27AQI (US)
5th June 2026
26AQI (US)
26AQI (US)
6th June 2026
14AQI (US)
14AQI (US)
7th June 2026
22AQI (US)
22AQI (US)
8th June 2026
21AQI (US)
21AQI (US)
9th June 2026
16AQI (US)
16AQI (US)
10th June 2026
19AQI (US)
19AQI (US)
11th June 2026
16AQI (US)
16AQI (US)
12th June 2026
16AQI (US)
16AQI (US)
13th June 2026
14AQI (US)
14AQI (US)
14th June 2026
17AQI (US)
17AQI (US)
15th June 2026
16AQI (US)
16AQI (US)
16th June 2026
17AQI (US)
17AQI (US)
17th June 2026
14AQI (US)
14AQI (US)
18th June 2026
22AQI (US)
22AQI (US)
19th June 2026
20AQI (US)
20AQI (US)
20th June 2026
20AQI (US)
20AQI (US)
21st June 2026
21AQI (US)
21AQI (US)
22nd June 2026
22AQI (US)
22AQI (US)
23rd June 2026
17AQI (US)
17AQI (US)
24th June 2026
15AQI (US)
15AQI (US)
25th June 2026
14AQI (US)
14AQI (US)
26th June 2026
21AQI (US)
21AQI (US)
27th June 2026
26AQI (US)
26AQI (US)
28th June 2026
22AQI (US)
22AQI (US)
29th June 2026
27AQI (US)
27AQI (US)
30th June 2026
55AQI (US)
55AQI (US)
1st July 2026
73AQI (US)
73AQI (US)
2nd July 2026
27AQI (US)
27AQI (US)
3rd July 2026
16AQI (US)
16AQI (US)
4th July 2026
27AQI (US)
27AQI (US)
5th July 2026
44AQI (US)
44AQI (US)
6th July 2026
38AQI (US)
38AQI (US)
7th July 2026
36AQI (US)
36AQI (US)
8th July 2026
36AQI (US)
36AQI (US)
9th July 2026
26AQI (US)
26AQI (US)
10th July 2026
23AQI (US)
23AQI (US)
11th July 2026
36AQI (US)
36AQI (US)
12th July 2026
39AQI (US)
39AQI (US)
13th July 2026
41AQI (US)
41AQI (US)
14th July 2026
33AQI (US)
33AQI (US)
15th July 2026
49AQI (US)
49AQI (US)
16th July 2026
99AQI (US)
99AQI (US)
17th July 2026
196AQI (US)
196AQI (US)
18th July 2026
68AQI (US)
68AQI (US)
19th July 2026
137AQI (US)
137AQI (US)
20th July 2026
131AQI (US)
131AQI (US)
21st July 2026
52AQI (US)
52AQI (US)
22nd July 2026
34AQI (US)
34AQI (US)
23rd July 2026
38AQI (US)
38AQI (US)
24th July 2026
41AQI (US)
41AQI (US)
25th July 2026
43AQI (US)
43AQI (US)
26th July 2026
53AQI (US)
53AQI (US)
27th July 2026
53AQI (US)
53AQI (US)
28th July 2026
44AQI (US)
44AQI (US)
29th July 2026
34AQI (US)
34AQI (US)
30th July 2026
41AQI (US)
41AQI (US)
31st July 2026
42AQI (US)
42AQI (US)
1st August 2026
42AQI (US)
42AQI (US)
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
29AQI (US)
37AQI (US)
34AQI (US)
26AQI (US)
32AQI (US)
21AQI (US)
53AQI (US)
42AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202633AQI (US)
29
2
28
30
1
28
28
2
29
1
22
6
2
1
1
195
12
2
1
Highest AQI (US) recorded in
July53AQI (US)
Lowest AQI (US) recorded in
June21AQI (US)
202538AQI (US)
5
30
31
15
15
20
10
1
18
12
1
22
8
26
5
27
3
20
11
214
64
2
Highest AQI (US) recorded in
June51AQI (US)
Lowest AQI (US) recorded in
May23AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Most Polluted Year Recorded
2025(Avg.)
38AQI (US)Least Polluted Year Recorded
2026(Avg.)
33AQI (US)Northbrook's annual 2026 AQI (US) (33) shows an average percentage change of -13.1% (improved AQI (US)) compared to previous years: 2025 (38).
