Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Naperville, 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

Naperville, Illinois, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
1st Aug 2025
108AQI
Lowest AQI recorded on
25th Aug 2025
18AQI

Same Day Analysis (1st August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 44 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 31st Jul - 1st Aug 2026

Naperville, Illinois, United States

AQI
Day
Night
.

5 AM31st Jul 2026

8 PM

4 AM1st Aug 2026

Day time
Avg. Highest Time
6AM31st Jul

54AQI

Avg. Lowest Time
8PM31st Jul

29AQI

Night time
Avg. Highest Time
3AM1st Aug

46AQI

Avg. Lowest Time
11PM31st Jul

21AQI

In the last 24 hours,

Naperville's AQI reached its highest point of 54 at 6 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

Naperville, 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 2026295 AMAQI
3rd Jul 2026226 AMAQI
3rd Jul 2026307 AMAQI
3rd Jul 2026208 AMAQI
3rd Jul 2026229 AMAQI
3rd Jul 20262010 AMAQI
3rd Jul 20263211 AMAQI
3rd Jul 20263812 PMAQI
3rd Jul 2026241 PMAQI
3rd Jul 2026272 PMAQI
3rd Jul 2026223 PMAQI
3rd Jul 2026264 PMAQI
3rd Jul 2026175 PMAQI
3rd Jul 2026306 PMAQI
3rd Jul 2026237 PMAQI
3rd Jul 2026218 PMAQI
3rd Jul 2026269 PMAQI
3rd Jul 20262510 PMAQI
3rd Jul 20262511 PMAQI
4th Jul 20262912 AMAQI
4th Jul 2026301 AMAQI
4th Jul 2026402 AMAQI
4th Jul 2026323 AMAQI
4th Jul 2026104 AMAQI

28°C22/35°C

4th Jul 2026265 AMAQI
4th Jul 2026266 AMAQI
4th Jul 2026267 AMAQI
4th Jul 2026478 AMAQI
4th Jul 2026249 AMAQI
4th Jul 20262710 AMAQI
4th Jul 20264411 AMAQI
4th Jul 20262612 PMAQI
4th Jul 2026261 PMAQI
4th Jul 2026292 PMAQI
4th Jul 2026403 PMAQI
4th Jul 2026254 PMAQI
4th Jul 2026445 PMAQI
4th Jul 2026246 PMAQI
4th Jul 2026227 PMAQI
4th Jul 2026218 PMAQI
4th Jul 2026259 PMAQI
4th Jul 20262510 PMAQI
4th Jul 202611211 PMAQI
5th Jul 202611212 AMAQI
5th Jul 2026641 AMAQI
5th Jul 2026622 AMAQI
5th Jul 2026553 AMAQI
5th Jul 2026504 AMAQI

24°C21/31°C

5th Jul 2026335 AMAQI
5th Jul 2026506 AMAQI
5th Jul 2026287 AMAQI
5th Jul 2026478 AMAQI
5th Jul 2026489 AMAQI
5th Jul 20264710 AMAQI
5th Jul 20264211 AMAQI
5th Jul 20262812 PMAQI
5th Jul 2026541 PMAQI
5th Jul 2026442 PMAQI
5th Jul 2026573 PMAQI
5th Jul 2026464 PMAQI
5th Jul 2026465 PMAQI
5th Jul 2026466 PMAQI
5th Jul 2026447 PMAQI
5th Jul 2026448 PMAQI
5th Jul 2026289 PMAQI
5th Jul 20263310 PMAQI
5th Jul 20263311 PMAQI
6th Jul 20263312 AMAQI
6th Jul 2026291 AMAQI
6th Jul 2026472 AMAQI
6th Jul 2026473 AMAQI
6th Jul 2026484 AMAQI

22°C19/26°C

6th Jul 2026505 AMAQI
6th Jul 2026346 AMAQI
6th Jul 2026467 AMAQI
6th Jul 2026448 AMAQI
6th Jul 2026429 AMAQI
6th Jul 20262510 AMAQI
6th Jul 20264011 AMAQI
6th Jul 20264112 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 2026369 PMAQI
6th Jul 20263810 PMAQI
6th Jul 20264011 PMAQI
7th Jul 20262912 AMAQI
7th Jul 2026381 AMAQI
7th Jul 2026542 AMAQI
7th Jul 2026323 AMAQI
7th Jul 2026304 AMAQI

23°C19/29°C

7th Jul 2026425 AMAQI
7th Jul 2026456 AMAQI
7th Jul 2026387 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 2026293 PMAQI
7th Jul 2026384 PMAQI
7th Jul 2026335 PMAQI
7th Jul 2026336 PMAQI
7th Jul 2026337 PMAQI
7th Jul 2026388 PMAQI
7th Jul 2026449 PMAQI
7th Jul 20264610 PMAQI
7th Jul 20263811 PMAQI
8th Jul 20263812 AMAQI
8th Jul 2026421 AMAQI
8th Jul 2026422 AMAQI
8th Jul 2026423 AMAQI
8th Jul 2026524 AMAQI

25°C19/32°C

8th Jul 2026425 AMAQI
8th Jul 2026426 AMAQI
8th Jul 2026467 AMAQI
8th Jul 2026428 AMAQI
8th Jul 2026429 AMAQI
8th Jul 20263410 AMAQI
8th Jul 20263311 AMAQI
8th Jul 20263312 PMAQI
8th Jul 2026401 PMAQI
8th Jul 2026292 PMAQI
8th Jul 2026363 PMAQI
8th Jul 2026444 PMAQI
8th Jul 2026445 PMAQI
8th Jul 2026386 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 2026441 AMAQI
9th Jul 2026462 AMAQI
9th Jul 2026503 AMAQI
9th Jul 2026294 AMAQI

26°C19/34°C

9th Jul 2026295 AMAQI
9th Jul 2026216 AMAQI
9th Jul 2026437 AMAQI
9th Jul 2026298 AMAQI
9th Jul 2026359 AMAQI
9th Jul 20262810 AMAQI
9th Jul 20263411 AMAQI
9th Jul 20262412 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026303 PMAQI
9th Jul 2026174 PMAQI
9th Jul 2026245 PMAQI
9th Jul 2026176 PMAQI
9th Jul 2026267 PMAQI
9th Jul 2026178 PMAQI
9th Jul 2026219 PMAQI
9th Jul 20261710 PMAQI
9th Jul 20262011 PMAQI
10th Jul 20262212 AMAQI
10th Jul 2026221 AMAQI
10th Jul 2026172 AMAQI
10th Jul 2026103 AMAQI
10th Jul 2026414 AMAQI

26°C21/33°C

10th Jul 2026405 AMAQI
10th Jul 2026446 AMAQI
10th Jul 2026217 AMAQI
10th Jul 2026328 AMAQI
10th Jul 2026219 AMAQI
10th Jul 20261710 AMAQI
10th Jul 20261711 AMAQI
10th Jul 20262112 PMAQI
10th Jul 2026171 PMAQI
10th Jul 2026212 PMAQI
10th Jul 2026213 PMAQI
10th Jul 2026214 PMAQI
10th Jul 2026365 PMAQI
10th Jul 2026366 PMAQI
10th Jul 2026367 PMAQI
10th Jul 2026348 PMAQI
10th Jul 2026309 PMAQI
10th Jul 20263310 PMAQI
10th Jul 20262911 PMAQI
11th Jul 20263812 AMAQI
11th Jul 2026361 AMAQI
11th Jul 2026492 AMAQI
11th Jul 2026723 AMAQI
11th Jul 2026564 AMAQI

25°C20/32°C

11th Jul 2026545 AMAQI
11th Jul 2026426 AMAQI
11th Jul 2026467 AMAQI
11th Jul 2026428 AMAQI
11th Jul 2026429 AMAQI
11th Jul 20264210 AMAQI
11th Jul 20264311 AMAQI
11th Jul 20264212 PMAQI
11th Jul 2026421 PMAQI
11th Jul 2026322 PMAQI
11th Jul 2026213 PMAQI
11th Jul 2026214 PMAQI
11th Jul 2026255 PMAQI
11th Jul 2026266 PMAQI
11th Jul 2026277 PMAQI
11th Jul 2026408 PMAQI
11th Jul 2026409 PMAQI
11th Jul 20265110 PMAQI
11th Jul 20263011 PMAQI
12th Jul 20264612 AMAQI
12th Jul 2026381 AMAQI
12th Jul 2026342 AMAQI
12th Jul 2026383 AMAQI
12th Jul 2026284 AMAQI

24°C19/31°C

12th Jul 2026425 AMAQI
12th Jul 2026426 AMAQI
12th Jul 2026447 AMAQI
12th Jul 2026408 AMAQI
12th Jul 2026469 AMAQI
12th Jul 20265410 AMAQI
12th Jul 20264911 AMAQI
12th Jul 20264912 PMAQI
12th Jul 2026381 PMAQI
12th Jul 2026342 PMAQI
12th Jul 2026383 PMAQI
12th Jul 2026504 PMAQI
12th Jul 2026505 PMAQI
12th Jul 2026426 PMAQI
12th Jul 2026427 PMAQI
12th Jul 2026368 PMAQI
12th Jul 2026389 PMAQI
12th Jul 20264210 PMAQI
12th Jul 20264211 PMAQI
13th Jul 20265012 AMAQI
13th Jul 2026461 AMAQI
13th Jul 2026462 AMAQI
13th Jul 2026463 AMAQI
13th Jul 2026464 AMAQI

26°C19/34°C

13th Jul 2026465 AMAQI
13th Jul 2026526 AMAQI
13th Jul 2026507 AMAQI
13th Jul 2026448 AMAQI
13th Jul 2026449 AMAQI
13th Jul 20265310 AMAQI
13th Jul 20264811 AMAQI
13th Jul 20264812 PMAQI
13th Jul 2026421 PMAQI
13th Jul 2026382 PMAQI
13th Jul 2026293 PMAQI
13th Jul 2026334 PMAQI
13th Jul 2026345 PMAQI
13th Jul 2026386 PMAQI
13th Jul 2026467 PMAQI
13th Jul 2026428 PMAQI
13th Jul 2026409 PMAQI
13th Jul 20264410 PMAQI
13th Jul 20263311 PMAQI
14th Jul 20263312 AMAQI
14th Jul 2026501 AMAQI
14th Jul 2026522 AMAQI
14th Jul 2026503 AMAQI
14th Jul 2026484 AMAQI

27°C19/35°C

14th Jul 2026335 AMAQI
14th Jul 2026356 AMAQI
14th Jul 2026347 AMAQI
14th Jul 2026368 AMAQI
14th Jul 2026369 AMAQI
14th Jul 20263410 AMAQI
14th Jul 20263511 AMAQI
14th Jul 20264212 PMAQI
14th Jul 2026321 PMAQI
14th Jul 2026382 PMAQI
14th Jul 2026343 PMAQI
14th Jul 2026284 PMAQI
14th Jul 2026305 PMAQI
14th Jul 2026366 PMAQI
14th Jul 2026387 PMAQI
14th Jul 2026318 PMAQI
14th Jul 2026289 PMAQI
14th Jul 20262410 PMAQI
14th Jul 20262011 PMAQI
15th Jul 20262212 AMAQI
15th Jul 2026421 AMAQI
15th Jul 2026942 AMAQI
15th Jul 2026503 AMAQI
15th Jul 2026294 AMAQI

29°C21/37°C

15th Jul 2026295 AMAQI
15th Jul 2026346 AMAQI
15th Jul 2026867 AMAQI
15th Jul 2026338 AMAQI
15th Jul 2026529 AMAQI
15th Jul 20264410 AMAQI
15th Jul 20264411 AMAQI
15th Jul 20264712 PMAQI
15th Jul 2026441 PMAQI
15th Jul 2026552 PMAQI
15th Jul 2026443 PMAQI
15th Jul 2026404 PMAQI
15th Jul 2026295 PMAQI
15th Jul 2026406 PMAQI
15th Jul 2026427 PMAQI
15th Jul 2026408 PMAQI
15th Jul 2026629 PMAQI
15th Jul 202612810 PMAQI
15th Jul 202610611 PMAQI
16th Jul 202614412 AMAQI
16th Jul 2026281 AMAQI
16th Jul 2026242 AMAQI
16th Jul 2026663 AMAQI
16th Jul 20261004 AMAQI

29°C23/37°C

16th Jul 20261045 AMAQI
16th Jul 20262096 AMAQI
16th Jul 20261207 AMAQI
16th Jul 20261448 AMAQI
16th Jul 20261909 AMAQI
16th Jul 20263210 AMAQI
16th Jul 20263011 AMAQI
16th Jul 202626412 PMAQI
16th Jul 2026301 PMAQI
16th Jul 20261332 PMAQI
16th Jul 20261153 PMAQI
16th Jul 20261004 PMAQI
16th Jul 20261335 PMAQI
16th Jul 2026566 PMAQI
16th Jul 20261077 PMAQI
16th Jul 2026308 PMAQI
16th Jul 2026289 PMAQI
16th Jul 202611010 PMAQI
16th Jul 202611611 PMAQI
17th Jul 202616512 AMAQI
17th Jul 2026241 AMAQI
17th Jul 2026382 AMAQI
17th Jul 20262893 AMAQI
17th Jul 20264084 AMAQI

28°C22/37°C

17th Jul 2026665 AMAQI
17th Jul 2026706 AMAQI
17th Jul 2026717 AMAQI
17th Jul 2026798 AMAQI
17th Jul 2026689 AMAQI
17th Jul 20267510 AMAQI
17th Jul 20267411 AMAQI
17th Jul 20266812 PMAQI
17th Jul 2026791 PMAQI
17th Jul 2026762 PMAQI
17th Jul 2026673 PMAQI
17th Jul 2026704 PMAQI
17th Jul 2026655 PMAQI
17th Jul 2026786 PMAQI
17th Jul 2026707 PMAQI
17th Jul 2026598 PMAQI
17th Jul 2026549 PMAQI
17th Jul 20265210 PMAQI
17th Jul 20265111 PMAQI
18th Jul 20264612 AMAQI
18th Jul 2026491 AMAQI
18th Jul 2026502 AMAQI
18th Jul 2026483 AMAQI
18th Jul 2026484 AMAQI

28°C24/34°C

18th Jul 2026465 AMAQI
18th Jul 2026506 AMAQI
18th Jul 2026487 AMAQI
18th Jul 2026488 AMAQI
18th Jul 2026489 AMAQI
18th Jul 20264610 AMAQI
18th Jul 20264611 AMAQI
18th Jul 20264412 PMAQI
18th Jul 2026461 PMAQI
18th Jul 2026442 PMAQI
18th Jul 2026463 PMAQI
18th Jul 2026444 PMAQI
18th Jul 2026485 PMAQI
18th Jul 2026516 PMAQI
18th Jul 2026567 PMAQI
18th Jul 2026598 PMAQI
18th Jul 2026639 PMAQI
18th Jul 20267410 PMAQI
18th Jul 20266011 PMAQI
19th Jul 20265812 AMAQI
19th Jul 2026601 AMAQI
19th Jul 2026562 AMAQI
19th Jul 20261743 AMAQI
19th Jul 20261704 AMAQI

27°C24/34°C

19th Jul 2026725 AMAQI
19th Jul 2026676 AMAQI
19th Jul 2026797 AMAQI
19th Jul 2026758 AMAQI
19th Jul 2026759 AMAQI
19th Jul 20267810 AMAQI
19th Jul 20268411 AMAQI
19th Jul 20268012 PMAQI
19th Jul 2026811 PMAQI
19th Jul 2026762 PMAQI
19th Jul 2026823 PMAQI
19th Jul 2026834 PMAQI
19th Jul 2026745 PMAQI
19th Jul 2026786 PMAQI
19th Jul 2026857 PMAQI
19th Jul 2026808 PMAQI
19th Jul 2026749 PMAQI
19th Jul 20267310 PMAQI
19th Jul 20266411 PMAQI
20th Jul 20266612 AMAQI
20th Jul 2026701 AMAQI
20th Jul 2026762 AMAQI
20th Jul 20261343 AMAQI
20th Jul 20261264 AMAQI

24°C19/31°C

20th Jul 2026785 AMAQI
20th Jul 2026766 AMAQI
20th Jul 2026827 AMAQI
20th Jul 2026948 AMAQI
20th Jul 2026859 AMAQI
20th Jul 20268410 AMAQI
20th Jul 20267711 AMAQI
20th Jul 20267212 PMAQI
20th Jul 2026641 PMAQI
20th Jul 2026722 PMAQI
20th Jul 2026743 PMAQI
20th Jul 2026764 PMAQI
20th Jul 2026725 PMAQI
20th Jul 2026806 PMAQI
20th Jul 2026847 PMAQI
20th Jul 2026828 PMAQI
20th Jul 2026759 PMAQI
20th Jul 20266211 PMAQI
21st Jul 20266712 AMAQI
21st Jul 2026651 AMAQI
21st Jul 2026622 AMAQI
21st Jul 2026883 AMAQI
21st Jul 2026684 AMAQI

23°C17/30°C

21st Jul 2026555 AMAQI
21st Jul 2026466 AMAQI
21st Jul 2026527 AMAQI
21st Jul 2026468 AMAQI
21st Jul 2026409 AMAQI
21st Jul 20265110 AMAQI
21st Jul 20264611 AMAQI
21st Jul 20265412 PMAQI
21st Jul 2026581 PMAQI
21st Jul 2026602 PMAQI
21st Jul 2026583 PMAQI
21st Jul 2026534 PMAQI
21st Jul 2026485 PMAQI
21st Jul 2026466 PMAQI
21st Jul 2026427 PMAQI
21st Jul 2026448 PMAQI
21st Jul 2026449 PMAQI
21st Jul 20265310 PMAQI
21st Jul 20263211 PMAQI
22nd Jul 20264612 AMAQI
22nd Jul 2026461 AMAQI
22nd Jul 2026462 AMAQI
22nd Jul 2026423 AMAQI
22nd Jul 2026344 AMAQI

26°C20/32°C

22nd Jul 2026505 AMAQI
22nd Jul 2026406 AMAQI
22nd Jul 2026387 AMAQI
22nd Jul 2026328 AMAQI
22nd Jul 2026289 AMAQI
22nd Jul 20262010 AMAQI
22nd Jul 20261311 AMAQI
22nd Jul 20262012 PMAQI
22nd Jul 2026151 PMAQI
22nd Jul 2026202 PMAQI
22nd Jul 2026183 PMAQI
22nd Jul 2026254 PMAQI
22nd Jul 2026255 PMAQI
22nd Jul 2026256 PMAQI
22nd Jul 2026277 PMAQI
22nd Jul 2026278 PMAQI
22nd Jul 2026689 PMAQI
22nd Jul 20264810 PMAQI
22nd Jul 20263311 PMAQI
23rd Jul 20264012 AMAQI
23rd Jul 2026561 AMAQI
23rd Jul 2026462 AMAQI
23rd Jul 2026513 AMAQI
23rd Jul 2026424 AMAQI

20°C15/25°C

23rd Jul 2026425 AMAQI
23rd Jul 2026446 AMAQI
23rd Jul 2026467 AMAQI
23rd Jul 2026508 AMAQI
23rd Jul 2026489 AMAQI
23rd Jul 20264410 AMAQI
23rd Jul 20264611 AMAQI
23rd Jul 20264412 PMAQI
23rd Jul 2026601 PMAQI
23rd Jul 2026442 PMAQI
23rd Jul 2026403 PMAQI
23rd Jul 2026364 PMAQI
23rd Jul 2026425 PMAQI
23rd Jul 2026426 PMAQI
23rd Jul 2026407 PMAQI
23rd Jul 2026408 PMAQI
23rd Jul 2026269 PMAQI
23rd Jul 20262910 PMAQI
23rd Jul 20264411 PMAQI
24th Jul 20264412 AMAQI
24th Jul 2026481 AMAQI
24th Jul 2026502 AMAQI
24th Jul 2026463 AMAQI
24th Jul 2026524 AMAQI

20°C13/28°C

24th Jul 2026515 AMAQI
24th Jul 2026506 AMAQI
24th Jul 2026467 AMAQI
24th Jul 2026528 AMAQI
24th Jul 2026529 AMAQI
24th Jul 20265010 AMAQI
24th Jul 20265011 AMAQI
24th Jul 20264612 PMAQI
24th Jul 2026421 PMAQI
24th Jul 2026462 PMAQI
24th Jul 2026463 PMAQI
24th Jul 2026444 PMAQI
24th Jul 2026465 PMAQI
24th Jul 2026426 PMAQI
24th Jul 2026407 PMAQI
24th Jul 2026468 PMAQI
24th Jul 2026429 PMAQI
24th Jul 20264210 PMAQI
24th Jul 20264211 PMAQI
25th Jul 20264612 AMAQI
25th Jul 2026501 AMAQI
25th Jul 2026462 AMAQI
25th Jul 2026483 AMAQI
25th Jul 2026464 AMAQI

22°C16/28°C

25th Jul 2026465 AMAQI
25th Jul 2026486 AMAQI
25th Jul 2026577 AMAQI
25th Jul 2026568 AMAQI
25th Jul 2026579 AMAQI
25th Jul 20265210 AMAQI
25th Jul 20265211 AMAQI
25th Jul 20265312 PMAQI
25th Jul 2026531 PMAQI
25th Jul 2026502 PMAQI
25th Jul 2026443 PMAQI
25th Jul 2026484 PMAQI
25th Jul 2026515 PMAQI
25th Jul 2026516 PMAQI
25th Jul 2026517 PMAQI
25th Jul 2026518 PMAQI
25th Jul 2026539 PMAQI
25th Jul 20265110 PMAQI
25th Jul 20265011 PMAQI
26th Jul 20265212 AMAQI
26th Jul 2026491 AMAQI
26th Jul 2026442 AMAQI
26th Jul 2026463 AMAQI
26th Jul 2026484 AMAQI

22°C16/27°C

26th Jul 2026515 AMAQI
26th Jul 2026486 AMAQI
26th Jul 2026527 AMAQI
26th Jul 2026508 AMAQI
26th Jul 2026489 AMAQI
26th Jul 20264610 AMAQI
26th Jul 20264611 AMAQI
26th Jul 20265212 PMAQI
26th Jul 2026511 PMAQI
26th Jul 2026552 PMAQI
26th Jul 2026543 PMAQI
26th Jul 2026544 PMAQI
26th Jul 2026555 PMAQI
26th Jul 2026566 PMAQI
26th Jul 2026577 PMAQI
26th Jul 2026578 PMAQI
26th Jul 2026559 PMAQI
26th Jul 20265610 PMAQI
26th Jul 20265711 PMAQI
27th Jul 20265512 AMAQI
27th Jul 2026561 AMAQI
27th Jul 2026542 AMAQI
27th Jul 2026563 AMAQI
27th Jul 2026544 AMAQI

27°C22/35°C

27th Jul 2026575 AMAQI
27th Jul 2026576 AMAQI
27th Jul 2026627 AMAQI
27th Jul 2026658 AMAQI
27th Jul 2026669 AMAQI
27th Jul 20266510 AMAQI
27th Jul 20266411 AMAQI
27th Jul 20266212 PMAQI
27th Jul 2026631 PMAQI
27th Jul 2026542 PMAQI
27th Jul 2026463 PMAQI
27th Jul 2026504 PMAQI
27th Jul 2026385 PMAQI
27th Jul 2026346 PMAQI
27th Jul 2026447 PMAQI
27th Jul 2026448 PMAQI
27th Jul 2026469 PMAQI
27th Jul 20264810 PMAQI
27th Jul 20264611 PMAQI
28th Jul 20264412 AMAQI
28th Jul 2026461 AMAQI
28th Jul 2026462 AMAQI
28th Jul 2026463 AMAQI
28th Jul 2026444 AMAQI

27°C22/36°C

28th Jul 2026485 AMAQI
28th Jul 2026446 AMAQI
28th Jul 2026517 AMAQI
28th Jul 2026488 AMAQI
28th Jul 2026449 AMAQI
28th Jul 20264610 AMAQI
28th Jul 20264411 AMAQI
28th Jul 20265112 PMAQI
28th Jul 2026551 PMAQI
28th Jul 2026562 PMAQI
28th Jul 2026573 PMAQI
28th Jul 2026584 PMAQI
28th Jul 2026555 PMAQI
28th Jul 2026526 PMAQI
28th Jul 2026497 PMAQI
28th Jul 2026448 PMAQI
28th Jul 2026299 PMAQI
28th Jul 20262710 PMAQI
28th Jul 20263611 PMAQI
29th Jul 20264612 AMAQI
29th Jul 2026501 AMAQI
29th Jul 2026362 AMAQI
29th Jul 2026303 AMAQI
29th Jul 2026324 AMAQI

23°C19/29°C

29th Jul 2026385 AMAQI
29th Jul 2026406 AMAQI
29th Jul 2026427 AMAQI
29th Jul 2026218 AMAQI
29th Jul 2026279 AMAQI
29th Jul 20263210 AMAQI
29th Jul 20263811 AMAQI
29th Jul 20262512 PMAQI
29th Jul 2026311 PMAQI
29th Jul 2026382 PMAQI
29th Jul 2026283 PMAQI
29th Jul 2026344 PMAQI
29th Jul 2026265 PMAQI
29th Jul 2026386 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026218 PMAQI
29th Jul 2026429 PMAQI
29th Jul 20264210 PMAQI
29th Jul 20263011 PMAQI
30th Jul 20264612 AMAQI
30th Jul 2026251 AMAQI
30th Jul 2026292 AMAQI
30th Jul 2026493 AMAQI
30th Jul 2026524 AMAQI

23°C16/31°C

30th Jul 2026465 AMAQI
30th Jul 2026326 AMAQI
30th Jul 2026347 AMAQI
30th Jul 2026488 AMAQI
30th Jul 2026449 AMAQI
30th Jul 20264410 AMAQI
30th Jul 20264611 AMAQI
30th Jul 20264012 PMAQI
30th Jul 2026321 PMAQI
30th Jul 2026362 PMAQI
30th Jul 2026363 PMAQI
30th Jul 2026254 PMAQI
30th Jul 2026405 PMAQI
30th Jul 2026446 PMAQI
30th Jul 2026427 PMAQI
30th Jul 2026428 PMAQI
30th Jul 2026469 PMAQI
30th Jul 20265110 PMAQI
30th Jul 20265011 PMAQI
31st Jul 20265512 AMAQI
31st Jul 2026421 AMAQI
31st Jul 2026482 AMAQI
31st Jul 2026463 AMAQI
31st Jul 2026464 AMAQI

24°C16/34°C

31st Jul 2026535 AMAQI
31st Jul 2026546 AMAQI
31st Jul 2026517 AMAQI
31st Jul 2026508 AMAQI
31st Jul 2026499 AMAQI
31st Jul 20265010 AMAQI
31st Jul 20265011 AMAQI
31st Jul 20264612 PMAQI
31st Jul 2026481 PMAQI
31st Jul 2026462 PMAQI
31st Jul 2026443 PMAQI
31st Jul 2026464 PMAQI
31st Jul 2026485 PMAQI
31st Jul 2026406 PMAQI
31st Jul 2026317 PMAQI
31st Jul 2026298 PMAQI
31st Jul 2026249 PMAQI
31st Jul 20263610 PMAQI
31st Jul 20262111 PMAQI
1st Aug 20262512 AMAQI
1st Aug 2026421 AMAQI
1st Aug 2026332 AMAQI
1st Aug 2026463 AMAQI
1st Aug 2026404 AMAQI

24°C19/31°C

1st Aug 2026425 AMAQI
5 AM
1st Aug 2026426 AMAQI
1st Aug 2026447 AMAQI
1st Aug 2026448 AMAQI
1st Aug 2026449 AMAQI
1st Aug 20264610 AMAQI
1st Aug 20264211 AMAQI
1st Aug 20264412 PMAQI
12 PM
1st Aug 2026441 PMAQI
1st Aug 2026442 PMAQI
1st Aug 2026513 PMAQI
1st Aug 2026514 PMAQI
1st Aug 2026485 PMAQI
1st Aug 2026486 PMAQI
1st Aug 2026507 PMAQI
1st Aug 2026468 PMAQI
8 PM
1st Aug 2026429 PMAQI
1st Aug 20265010 PMAQI
1st Aug 20264811 PMAQI
12 AM
4 AM

21°C19/24°C

Day time
Avg. Highest Time
12 PM

51AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
8 PM

41AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 12 PM (Avg. 51), while the lowest AQI was between 8 PM to 8 PM (Avg. 41).
Night time
Avg. Highest Time
4 AM

63AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
9 PM

42AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 4 AM (Avg. 63), while the lowest AQI was between 9 PM to 9 PM (Avg. 42).

2026 Days Vs Air Quality

Naperville, Illinois, United States

2026

90%

188

10%

21

0.4%

1

Total number of days with different AQI categories in last 213 days in 2026 (152 days remaining)

Good
188 Days
Moderate
21 Days
Poor
1 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 90%

Health Risk Level:

Very Low

In 2026, 90% 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

Naperville, 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
16AQI (US)
2nd January 2026
22AQI (US)
3rd January 2026
26AQI (US)
4th January 2026
26AQI (US)
5th January 2026
44AQI (US)
6th January 2026
62AQI (US)
7th January 2026
44AQI (US)
8th January 2026
43AQI (US)
9th January 2026
18AQI (US)
10th January 2026
27AQI (US)
11th January 2026
20AQI (US)
12th January 2026
20AQI (US)
13th January 2026
24AQI (US)
14th January 2026
13AQI (US)
15th January 2026
12AQI (US)
16th January 2026
19AQI (US)
17th January 2026
15AQI (US)
18th January 2026
14AQI (US)
19th January 2026
20AQI (US)
20th January 2026
23AQI (US)
21st January 2026
33AQI (US)
22nd January 2026
60AQI (US)
23rd January 2026
58AQI (US)
24th January 2026
48AQI (US)
25th January 2026
50AQI (US)
26th January 2026
47AQI (US)
27th January 2026
36AQI (US)
28th January 2026
42AQI (US)
29th January 2026
50AQI (US)
30th January 2026
59AQI (US)
31st January 2026
42AQI (US)
1st February 2026
45AQI (US)
2nd February 2026
52AQI (US)
3rd February 2026
48AQI (US)
4th February 2026
44AQI (US)
5th February 2026
52AQI (US)
6th February 2026
46AQI (US)
7th February 2026
39AQI (US)
8th February 2026
42AQI (US)
9th February 2026
48AQI (US)
10th February 2026
48AQI (US)
11th February 2026
37AQI (US)
12th February 2026
38AQI (US)
13th February 2026
51AQI (US)
14th February 2026
50AQI (US)
15th February 2026
47AQI (US)
16th February 2026
45AQI (US)
17th February 2026
48AQI (US)
18th February 2026
44AQI (US)
19th February 2026
43AQI (US)
20th February 2026
38AQI (US)
21st February 2026
36AQI (US)
22nd February 2026
36AQI (US)
23rd February 2026
37AQI (US)
24th February 2026
45AQI (US)
25th February 2026
43AQI (US)
26th February 2026
34AQI (US)
27th February 2026
34AQI (US)
28th February 2026
34AQI (US)
1st March 2026
39AQI (US)
2nd March 2026
57AQI (US)
3rd March 2026
43AQI (US)
4th March 2026
46AQI (US)
5th March 2026
46AQI (US)
6th March 2026
41AQI (US)
7th March 2026
36AQI (US)
8th March 2026
40AQI (US)
9th March 2026
36AQI (US)
10th March 2026
35AQI (US)
11th March 2026
42AQI (US)
12th March 2026
38AQI (US)
13th March 2026
40AQI (US)
14th March 2026
36AQI (US)
15th March 2026
31AQI (US)
16th March 2026
37AQI (US)
17th March 2026
34AQI (US)
18th March 2026
31AQI (US)
19th March 2026
40AQI (US)
20th March 2026
45AQI (US)
21st March 2026
40AQI (US)
22nd March 2026
34AQI (US)
23rd March 2026
40AQI (US)
24th March 2026
34AQI (US)
25th March 2026
33AQI (US)
26th March 2026
33AQI (US)
27th March 2026
30AQI (US)
28th March 2026
29AQI (US)
29th March 2026
30AQI (US)
30th March 2026
28AQI (US)
31st March 2026
27AQI (US)
1st April 2026
30AQI (US)
2nd April 2026
29AQI (US)
3rd April 2026
28AQI (US)
4th April 2026
31AQI (US)
5th April 2026
30AQI (US)
6th April 2026
31AQI (US)
7th April 2026
28AQI (US)
8th April 2026
35AQI (US)
9th April 2026
31AQI (US)
10th April 2026
33AQI (US)
11th April 2026
29AQI (US)
12th April 2026
29AQI (US)
13th April 2026
32AQI (US)
14th April 2026
32AQI (US)
15th April 2026
33AQI (US)
16th April 2026
29AQI (US)
17th April 2026
18th April 2026
28AQI (US)
19th April 2026
32AQI (US)
20th April 2026
27AQI (US)
21st April 2026
26AQI (US)
22nd April 2026
23rd April 2026
26AQI (US)
24th April 2026
28AQI (US)
25th April 2026
28AQI (US)
26th April 2026
34AQI (US)
27th April 2026
26AQI (US)
28th April 2026
25AQI (US)
29th April 2026
24AQI (US)
30th April 2026
27AQI (US)
1st May 2026
25AQI (US)
2nd May 2026
24AQI (US)
3rd May 2026
23AQI (US)
4th May 2026
36AQI (US)
5th May 2026
38AQI (US)
6th May 2026
28AQI (US)
7th May 2026
26AQI (US)
8th May 2026
34AQI (US)
9th May 2026
10th May 2026
30AQI (US)
11th May 2026
28AQI (US)
12th May 2026
26AQI (US)
13th May 2026
28AQI (US)
14th May 2026
25AQI (US)
15th May 2026
46AQI (US)
16th May 2026
52AQI (US)
17th May 2026
56AQI (US)
18th May 2026
57AQI (US)
19th May 2026
55AQI (US)
20th May 2026
51AQI (US)
21st May 2026
43AQI (US)
22nd May 2026
46AQI (US)
23rd May 2026
51AQI (US)
24th May 2026
47AQI (US)
25th May 2026
45AQI (US)
26th May 2026
32AQI (US)
27th May 2026
28AQI (US)
28th May 2026
15AQI (US)
29th May 2026
22AQI (US)
30th May 2026
27AQI (US)
31st May 2026
27AQI (US)
1st June 2026
30AQI (US)
2nd June 2026
23AQI (US)
3rd June 2026
23AQI (US)
4th June 2026
25AQI (US)
5th June 2026
32AQI (US)
6th June 2026
22AQI (US)
7th June 2026
25AQI (US)
8th June 2026
27AQI (US)
9th June 2026
23AQI (US)
10th June 2026
24AQI (US)
11th June 2026
25AQI (US)
12th June 2026
26AQI (US)
13th June 2026
23AQI (US)
14th June 2026
22AQI (US)
15th June 2026
24AQI (US)
16th June 2026
26AQI (US)
17th June 2026
26AQI (US)
18th June 2026
26AQI (US)
19th June 2026
22AQI (US)
20th June 2026
21AQI (US)
21st June 2026
25AQI (US)
22nd June 2026
22AQI (US)
23rd June 2026
18AQI (US)
24th June 2026
24AQI (US)
25th June 2026
25AQI (US)
26th June 2026
25AQI (US)
27th June 2026
32AQI (US)
28th June 2026
28AQI (US)
29th June 2026
28AQI (US)
30th June 2026
38AQI (US)
1st July 2026
32AQI (US)
2nd July 2026
25AQI (US)
3rd July 2026
24AQI (US)
4th July 2026
32AQI (US)
5th July 2026
48AQI (US)
6th July 2026
39AQI (US)
7th July 2026
37AQI (US)
8th July 2026
39AQI (US)
9th July 2026
29AQI (US)
10th July 2026
27AQI (US)
11th July 2026
40AQI (US)
12th July 2026
42AQI (US)
13th July 2026
43AQI (US)
14th July 2026
36AQI (US)
15th July 2026
52AQI (US)
16th July 2026
101AQI (US)
17th July 2026
92AQI (US)
18th July 2026
50AQI (US)
19th July 2026
82AQI (US)
20th July 2026
80AQI (US)
21st July 2026
53AQI (US)
22nd July 2026
33AQI (US)
23rd July 2026
43AQI (US)
24th July 2026
46AQI (US)
25th July 2026
50AQI (US)
26th July 2026
52AQI (US)
27th July 2026
54AQI (US)
28th July 2026
47AQI (US)
29th July 2026
34AQI (US)
30th July 2026
41AQI (US)
31st July 2026
44AQI (US)
1st August 2026
44AQI (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

33AQI (US)

43AQI (US)

37AQI (US)

29AQI (US)

36AQI (US)

25AQI (US)

47AQI (US)

44AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202636AQI (US)

27
4
25
3
30
1
28
24
6
30
23
7
1
1
188
21
1

Highest AQI (US) recorded in

July

47AQI (US)

Lowest AQI (US) recorded in

June

25AQI (US)

202538AQI (US)

30
1
27
1
29
2
26
4
30
1
15
15
16
14
1
18
12
1
21
9
27
4
25
5
19
12
283
80
2

Highest AQI (US) recorded in

June

54AQI (US)

Lowest AQI (US) recorded in

January

28AQI (US)

202433AQI (US)

28
3
21
8
30
1
30
30
1
26
3
27
4
23
8
28
2
28
3
29
1
28
3
328
37

Highest AQI (US) recorded in

February

39AQI (US)

Lowest AQI (US) recorded in

April

26AQI (US)

202343AQI (US)

22
9
26
2
26
5
25
5
25
6
5
22
1
2
17
6
3
16
14
25
5
28
3
24
5
27
4
266
86
4
2

Highest AQI (US) recorded in

June

80AQI (US)

Lowest AQI (US) recorded in

December

34AQI (US)

202237AQI (US)

25
5
16
5
27
4
27
2
27
4
26
4
18
5
1
27
2
25
6
21
8
19
12
259
57

Highest AQI (US) recorded in

July

43AQI (US)

Lowest AQI (US) recorded in

April

31AQI (US)

202140AQI (US)

13
11
20
8
24
7
17
8
1
30
1
28
2
17
12
20
10
28
2
27
4
21
7
22
9
267
81
1

Highest AQI (US) recorded in

July

47AQI (US)

Lowest AQI (US) recorded in

September

33AQI (US)

202037AQI (US)

11
2
20
1
18
26
4
26
5
28
3
27
2
29
2
24
4
19
10
228
33

Highest AQI (US) recorded in

December

43AQI (US)

Lowest AQI (US) recorded in

May

31AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2023(Avg.)
43AQI (US)
Least Polluted Year Recorded
2024(Avg.)
33AQI (US)

Naperville's annual 2026 AQI (US) (36) shows an average percentage change of -4.6% (improved AQI (US)) compared to previous years: 2020 (37), 2021 (40), 2022 (37), 2023 (43), 2024 (33), 2025 (38).