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Modesto, California, 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+

October Air Quality Analysis

Modesto, California, United States

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
15th Oct 2023
499AQI
Lowest AQI recorded on
2nd Oct 2025
19AQI

Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 41 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025

Modesto, California, United States

AQI
Day
Night
.

6 AM2nd Oct 2025

7 PM

5 AM3rd Oct 2025

Day time
Avg. Highest Time
5PM2nd Oct

36AQI

Avg. Lowest Time
3PM2nd Oct

7AQI

Night time
Avg. Highest Time
5AM3rd Oct

51AQI

Avg. Lowest Time
7PM2nd Oct

13AQI

In the last 24 hours,

Modesto's AQI reached its highest point of 51 at 5 AM during the Night, while the lowest point, 7, was recorded at 3 PM during the Day between 2nd Oct and 3rd Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Modesto, California, United States

SepOct
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 - 01st01st - 02nd02nd - 03rd03rd
Day
Night
3rd Sep 2025366 AMAQI
3rd Sep 2025347 AMAQI
3rd Sep 2025348 AMAQI
3rd Sep 2025349 AMAQI
3rd Sep 20253410 AMAQI
3rd Sep 20253511 AMAQI
3rd Sep 20254012 PMAQI
3rd Sep 2025451 PMAQI
3rd Sep 2025522 PMAQI
3rd Sep 2025523 PMAQI
3rd Sep 2025514 PMAQI
3rd Sep 2025525 PMAQI
3rd Sep 2025526 PMAQI
3rd Sep 2025477 PMAQI
3rd Sep 2025528 PMAQI
3rd Sep 2025549 PMAQI
3rd Sep 20255110 PMAQI
3rd Sep 20254011 PMAQI
4th Sep 20253912 AMAQI
4th Sep 2025341 AMAQI
4th Sep 2025322 AMAQI
4th Sep 2025243 AMAQI
4th Sep 2025184 AMAQI
4th Sep 2025255 AMAQI

--°C/°C

4th Sep 2025306 AMAQI
4th Sep 2025227 AMAQI
4th Sep 2025228 AMAQI
4th Sep 2025349 AMAQI
4th Sep 20253410 AMAQI
4th Sep 20254011 AMAQI
4th Sep 20254312 PMAQI
4th Sep 2025471 PMAQI
4th Sep 2025542 PMAQI
4th Sep 2025553 PMAQI
4th Sep 2025564 PMAQI
4th Sep 2025545 PMAQI
4th Sep 2025566 PMAQI
4th Sep 2025437 PMAQI
4th Sep 2025468 PMAQI
4th Sep 2025509 PMAQI
4th Sep 20254610 PMAQI
4th Sep 20254211 PMAQI
5th Sep 20253912 AMAQI
5th Sep 2025341 AMAQI
5th Sep 2025282 AMAQI
5th Sep 2025263 AMAQI
5th Sep 2025264 AMAQI
5th Sep 2025305 AMAQI

25°C15/38°C

5th Sep 2025266 AMAQI
5th Sep 2025247 AMAQI
5th Sep 2025288 AMAQI
5th Sep 2025299 AMAQI
5th Sep 20252810 AMAQI
5th Sep 20252811 AMAQI
5th Sep 20252812 PMAQI
5th Sep 2025361 PMAQI
5th Sep 2025462 PMAQI
5th Sep 2025523 PMAQI
5th Sep 2025524 PMAQI
5th Sep 2025535 PMAQI
5th Sep 2025536 PMAQI
5th Sep 2025337 PMAQI
5th Sep 2025548 PMAQI
5th Sep 2025529 PMAQI
5th Sep 20254910 PMAQI
5th Sep 20254311 PMAQI
6th Sep 20253912 AMAQI
6th Sep 2025381 AMAQI
6th Sep 2025362 AMAQI
6th Sep 2025323 AMAQI
6th Sep 2025294 AMAQI
6th Sep 2025275 AMAQI

22°C14/35°C

6th Sep 2025306 AMAQI
6th Sep 2025387 AMAQI
6th Sep 2025458 AMAQI
6th Sep 2025429 AMAQI
6th Sep 20254010 AMAQI
6th Sep 20254011 AMAQI
6th Sep 20254112 PMAQI
6th Sep 2025421 PMAQI
6th Sep 2025492 PMAQI
6th Sep 2025503 PMAQI
6th Sep 2025484 PMAQI
6th Sep 2025485 PMAQI
6th Sep 2025426 PMAQI
6th Sep 2025387 PMAQI
6th Sep 2025398 PMAQI
6th Sep 2025409 PMAQI
6th Sep 20254110 PMAQI
6th Sep 20253911 PMAQI
7th Sep 20253412 AMAQI
7th Sep 2025381 AMAQI
7th Sep 2025372 AMAQI
7th Sep 2025333 AMAQI
7th Sep 2025324 AMAQI
7th Sep 2025315 AMAQI

23°C15/35°C

7th Sep 2025286 AMAQI
7th Sep 2025257 AMAQI
7th Sep 2025268 AMAQI
7th Sep 2025299 AMAQI
7th Sep 20253210 AMAQI
7th Sep 20253211 AMAQI
7th Sep 20252812 PMAQI
7th Sep 2025231 PMAQI
7th Sep 2025202 PMAQI
7th Sep 2025203 PMAQI
7th Sep 2025224 PMAQI
7th Sep 2025295 PMAQI
7th Sep 2025316 PMAQI
7th Sep 2025317 PMAQI
7th Sep 2025248 PMAQI
7th Sep 2025199 PMAQI
7th Sep 20252110 PMAQI
7th Sep 20252211 PMAQI
8th Sep 20252112 AMAQI
8th Sep 2025211 AMAQI
8th Sep 2025212 AMAQI
8th Sep 2025223 AMAQI
8th Sep 2025224 AMAQI
8th Sep 2025235 AMAQI

23°C14/35°C

8th Sep 2025206 AMAQI
8th Sep 2025187 AMAQI
8th Sep 2025228 AMAQI
8th Sep 2025269 AMAQI
8th Sep 20252410 AMAQI
8th Sep 20252411 AMAQI
8th Sep 20252312 PMAQI
8th Sep 2025261 PMAQI
8th Sep 2025312 PMAQI
8th Sep 2025333 PMAQI
8th Sep 2025324 PMAQI
8th Sep 2025315 PMAQI
8th Sep 2025296 PMAQI
8th Sep 2025217 PMAQI
8th Sep 2025258 PMAQI
8th Sep 2025279 PMAQI
8th Sep 20253010 PMAQI
8th Sep 20252611 PMAQI
9th Sep 20252112 AMAQI
9th Sep 2025191 AMAQI
9th Sep 2025172 AMAQI
9th Sep 2025173 AMAQI
9th Sep 2025174 AMAQI
9th Sep 2025185 AMAQI

24°C16/34°C

9th Sep 2025166 AMAQI
9th Sep 2025167 AMAQI
9th Sep 2025158 AMAQI
9th Sep 2025149 AMAQI
9th Sep 20251910 AMAQI
9th Sep 20252011 AMAQI
9th Sep 20252112 PMAQI
9th Sep 2025221 PMAQI
9th Sep 2025192 PMAQI
9th Sep 2025203 PMAQI
9th Sep 2025204 PMAQI
9th Sep 2025225 PMAQI
9th Sep 2025266 PMAQI
9th Sep 2025177 PMAQI
9th Sep 2025218 PMAQI
9th Sep 2025239 PMAQI
9th Sep 20252510 PMAQI
9th Sep 20252111 PMAQI
10th Sep 20251912 AMAQI
10th Sep 2025191 AMAQI
10th Sep 2025212 AMAQI
10th Sep 2025233 AMAQI
10th Sep 2025204 AMAQI
10th Sep 2025195 AMAQI

23°C17/32°C

10th Sep 2025186 AMAQI
10th Sep 2025177 AMAQI
10th Sep 2025178 AMAQI
10th Sep 2025189 AMAQI
10th Sep 20252210 AMAQI
10th Sep 20252611 AMAQI
10th Sep 20252412 PMAQI
10th Sep 2025191 PMAQI
10th Sep 2025192 PMAQI
10th Sep 2025213 PMAQI
10th Sep 2025224 PMAQI
10th Sep 2025205 PMAQI
10th Sep 2025216 PMAQI
10th Sep 2025197 PMAQI
10th Sep 2025208 PMAQI
10th Sep 2025229 PMAQI
10th Sep 20252410 PMAQI
10th Sep 20252311 PMAQI
11th Sep 20253012 AMAQI
11th Sep 2025211 AMAQI
11th Sep 2025212 AMAQI
11th Sep 2025253 AMAQI
11th Sep 2025304 AMAQI
11th Sep 2025355 AMAQI

21°C17/30°C

11th Sep 2025326 AMAQI
11th Sep 2025307 AMAQI
11th Sep 2025288 AMAQI
11th Sep 2025319 AMAQI
11th Sep 20253410 AMAQI
11th Sep 20253711 AMAQI
11th Sep 20253712 PMAQI
11th Sep 2025361 PMAQI
11th Sep 2025362 PMAQI
11th Sep 2025353 PMAQI
11th Sep 2025374 PMAQI
11th Sep 2025405 PMAQI
11th Sep 2025306 PMAQI
11th Sep 2025297 PMAQI
11th Sep 2025308 PMAQI
11th Sep 2025329 PMAQI
11th Sep 20253210 PMAQI
11th Sep 20253411 PMAQI
12th Sep 20253412 AMAQI
12th Sep 2025311 AMAQI
12th Sep 2025312 AMAQI
12th Sep 2025323 AMAQI
12th Sep 2025364 AMAQI
12th Sep 2025385 AMAQI

22°C16/32°C

12th Sep 2025346 AMAQI
12th Sep 2025327 AMAQI
12th Sep 2025308 AMAQI
12th Sep 2025329 AMAQI
12th Sep 20253210 AMAQI
12th Sep 20253311 AMAQI
12th Sep 20253312 PMAQI
12th Sep 2025371 PMAQI
12th Sep 2025392 PMAQI
12th Sep 2025423 PMAQI
12th Sep 2025444 PMAQI
12th Sep 2025425 PMAQI
12th Sep 2025406 PMAQI
12th Sep 2025347 PMAQI
12th Sep 2025378 PMAQI
12th Sep 2025419 PMAQI
12th Sep 20254010 PMAQI
12th Sep 20254111 PMAQI
13th Sep 20254312 AMAQI
13th Sep 2025441 AMAQI
13th Sep 2025422 AMAQI
13th Sep 2025403 AMAQI
13th Sep 2025374 AMAQI
13th Sep 2025365 AMAQI

23°C15/35°C

13th Sep 2025366 AMAQI
13th Sep 2025387 AMAQI
13th Sep 2025388 AMAQI
13th Sep 2025429 AMAQI
13th Sep 20254010 AMAQI
13th Sep 20254211 AMAQI
13th Sep 20254412 PMAQI
13th Sep 2025451 PMAQI
13th Sep 2025452 PMAQI
13th Sep 2025493 PMAQI
13th Sep 2025474 PMAQI
13th Sep 2025455 PMAQI
13th Sep 2025436 PMAQI
13th Sep 2025437 PMAQI
13th Sep 2025438 PMAQI
13th Sep 2025499 PMAQI
13th Sep 20254710 PMAQI
13th Sep 20254411 PMAQI
14th Sep 20253912 AMAQI
14th Sep 2025421 AMAQI
14th Sep 2025422 AMAQI
14th Sep 2025433 AMAQI
14th Sep 2025404 AMAQI
14th Sep 2025405 AMAQI

23°C15/36°C

14th Sep 2025406 AMAQI
14th Sep 2025397 AMAQI
14th Sep 2025378 AMAQI
14th Sep 2025369 AMAQI
14th Sep 20253410 AMAQI
14th Sep 20253511 AMAQI
14th Sep 20253712 PMAQI
14th Sep 2025381 PMAQI
14th Sep 2025362 PMAQI
14th Sep 2025343 PMAQI
14th Sep 2025344 PMAQI
14th Sep 2025345 PMAQI
14th Sep 2025346 PMAQI
14th Sep 2025407 PMAQI
14th Sep 2025378 PMAQI
14th Sep 2025369 PMAQI
14th Sep 20253610 PMAQI
14th Sep 20253611 PMAQI
15th Sep 20253512 AMAQI
15th Sep 2025341 AMAQI
15th Sep 2025352 AMAQI
15th Sep 2025343 AMAQI
15th Sep 2025374 AMAQI
15th Sep 2025365 AMAQI

23°C14/36°C

15th Sep 2025436 AMAQI
15th Sep 2025267 AMAQI
15th Sep 2025298 AMAQI
15th Sep 2025489 AMAQI
15th Sep 20253410 AMAQI
15th Sep 20253511 AMAQI
15th Sep 20253112 PMAQI
15th Sep 2025341 PMAQI
15th Sep 2025372 PMAQI
15th Sep 2025353 PMAQI
15th Sep 2025364 PMAQI
15th Sep 2025365 PMAQI
15th Sep 2025356 PMAQI
15th Sep 2025347 PMAQI
15th Sep 2025388 PMAQI
15th Sep 2025409 PMAQI
15th Sep 20253810 PMAQI
15th Sep 20254111 PMAQI
16th Sep 20254212 AMAQI
16th Sep 2025401 AMAQI
16th Sep 2025392 AMAQI
16th Sep 2025463 AMAQI
16th Sep 2025484 AMAQI
16th Sep 2025445 AMAQI

25°C15/38°C

16th Sep 2025476 AMAQI
16th Sep 2025447 AMAQI
16th Sep 2025478 AMAQI
16th Sep 2025549 AMAQI
16th Sep 20255510 AMAQI
16th Sep 20255311 AMAQI
16th Sep 20255312 PMAQI
16th Sep 2025501 PMAQI
16th Sep 2025522 PMAQI
16th Sep 2025503 PMAQI
16th Sep 2025484 PMAQI
16th Sep 2025505 PMAQI
16th Sep 2025476 PMAQI
16th Sep 2025457 PMAQI
16th Sep 2025418 PMAQI
16th Sep 2025449 PMAQI
16th Sep 20254410 PMAQI
16th Sep 20255011 PMAQI
17th Sep 20254912 AMAQI
17th Sep 2025441 AMAQI
17th Sep 2025392 AMAQI
17th Sep 2025383 AMAQI
17th Sep 2025404 AMAQI
17th Sep 2025405 AMAQI

28°C18/41°C

17th Sep 2025386 AMAQI
17th Sep 2025367 AMAQI
17th Sep 2025338 AMAQI
17th Sep 2025389 AMAQI
17th Sep 20253710 AMAQI
17th Sep 20253411 AMAQI
17th Sep 20253812 PMAQI
17th Sep 2025461 PMAQI
17th Sep 2025482 PMAQI
17th Sep 2025463 PMAQI
17th Sep 2025454 PMAQI
17th Sep 2025445 PMAQI
17th Sep 2025446 PMAQI
17th Sep 2025427 PMAQI
17th Sep 2025448 PMAQI
17th Sep 2025429 PMAQI
17th Sep 20254210 PMAQI
17th Sep 20254211 PMAQI
18th Sep 20254412 AMAQI
18th Sep 2025421 AMAQI
18th Sep 2025422 AMAQI
18th Sep 2025383 AMAQI
18th Sep 2025314 AMAQI
18th Sep 2025265 AMAQI

28°C18/40°C

18th Sep 2025306 AMAQI
18th Sep 2025337 AMAQI
18th Sep 2025338 AMAQI
18th Sep 2025359 AMAQI
18th Sep 20254210 AMAQI
18th Sep 20254111 AMAQI
18th Sep 20254412 PMAQI
18th Sep 2025461 PMAQI
18th Sep 2025442 PMAQI
18th Sep 2025423 PMAQI
18th Sep 2025484 PMAQI
18th Sep 2025465 PMAQI
18th Sep 2025446 PMAQI
18th Sep 2025437 PMAQI
18th Sep 2025428 PMAQI
18th Sep 2025489 PMAQI
18th Sep 20255410 PMAQI
18th Sep 20254811 PMAQI
19th Sep 20255112 AMAQI
19th Sep 2025601 AMAQI
19th Sep 2025502 AMAQI
19th Sep 2025473 AMAQI
19th Sep 2025444 AMAQI
19th Sep 2025435 AMAQI

27°C21/35°C

19th Sep 2025486 AMAQI
19th Sep 2025517 AMAQI
19th Sep 2025488 AMAQI
19th Sep 2025499 AMAQI
19th Sep 20254710 AMAQI
19th Sep 20254711 AMAQI
19th Sep 20255512 PMAQI
19th Sep 2025521 PMAQI
19th Sep 2025522 PMAQI
19th Sep 2025513 PMAQI
19th Sep 2025524 PMAQI
19th Sep 2025515 PMAQI
19th Sep 2025486 PMAQI
19th Sep 2025507 PMAQI
19th Sep 2025498 PMAQI
19th Sep 2025499 PMAQI
19th Sep 20254610 PMAQI
19th Sep 20254811 PMAQI
20th Sep 20255012 AMAQI
20th Sep 2025521 AMAQI
20th Sep 2025502 AMAQI
20th Sep 2025473 AMAQI
20th Sep 2025314 AMAQI
20th Sep 2025335 AMAQI

26°C19/35°C

20th Sep 2025356 AMAQI
20th Sep 2025397 AMAQI
20th Sep 2025448 AMAQI
20th Sep 2025469 AMAQI
20th Sep 20253910 AMAQI
20th Sep 20254211 AMAQI
20th Sep 20254612 PMAQI
20th Sep 2025511 PMAQI
20th Sep 2025512 PMAQI
20th Sep 2025503 PMAQI
20th Sep 2025484 PMAQI
20th Sep 2025485 PMAQI
20th Sep 2025476 PMAQI
20th Sep 2025477 PMAQI
20th Sep 2025448 PMAQI
20th Sep 2025449 PMAQI
20th Sep 20254310 PMAQI
20th Sep 20254311 PMAQI
21st Sep 20254012 AMAQI
21st Sep 2025411 AMAQI
21st Sep 2025422 AMAQI
21st Sep 2025433 AMAQI
21st Sep 2025384 AMAQI
21st Sep 2025315 AMAQI

24°C15/36°C

21st Sep 2025306 AMAQI
21st Sep 2025337 AMAQI
21st Sep 2025348 AMAQI
21st Sep 2025319 AMAQI
21st Sep 20253210 AMAQI
21st Sep 20253011 AMAQI
21st Sep 20252912 PMAQI
21st Sep 2025301 PMAQI
21st Sep 2025382 PMAQI
21st Sep 2025353 PMAQI
21st Sep 2025394 PMAQI
21st Sep 2025365 PMAQI
21st Sep 2025356 PMAQI
21st Sep 2025357 PMAQI
21st Sep 2025348 PMAQI
21st Sep 2025329 PMAQI
21st Sep 20253210 PMAQI
21st Sep 20253111 PMAQI
22nd Sep 20253212 AMAQI
22nd Sep 2025321 AMAQI
22nd Sep 2025322 AMAQI
22nd Sep 2025353 AMAQI
22nd Sep 2025324 AMAQI
22nd Sep 2025315 AMAQI

26°C18/36°C

22nd Sep 2025326 AMAQI
22nd Sep 2025317 AMAQI
22nd Sep 2025328 AMAQI
22nd Sep 2025379 AMAQI
22nd Sep 20253810 AMAQI
22nd Sep 20254511 AMAQI
22nd Sep 20253612 PMAQI
22nd Sep 2025391 PMAQI
22nd Sep 2025432 PMAQI
22nd Sep 2025403 PMAQI
22nd Sep 2025394 PMAQI
22nd Sep 2025385 PMAQI
22nd Sep 2025376 PMAQI
22nd Sep 2025347 PMAQI
22nd Sep 2025358 PMAQI
22nd Sep 2025369 PMAQI
22nd Sep 20253710 PMAQI
22nd Sep 20254011 PMAQI
23rd Sep 20253812 AMAQI
23rd Sep 2025421 AMAQI
23rd Sep 2025432 AMAQI
23rd Sep 2025403 AMAQI
23rd Sep 2025404 AMAQI
23rd Sep 2025415 AMAQI

27°C17/38°C

23rd Sep 2025406 AMAQI
23rd Sep 2025407 AMAQI
23rd Sep 2025398 AMAQI
23rd Sep 2025389 AMAQI
23rd Sep 20254210 AMAQI
23rd Sep 20254311 AMAQI
23rd Sep 20254612 PMAQI
23rd Sep 2025491 PMAQI
23rd Sep 2025512 PMAQI
23rd Sep 2025503 PMAQI
23rd Sep 2025504 PMAQI
23rd Sep 2025485 PMAQI
23rd Sep 2025496 PMAQI
23rd Sep 2025467 PMAQI
23rd Sep 2025468 PMAQI
23rd Sep 2025479 PMAQI
23rd Sep 20255010 PMAQI
23rd Sep 20255111 PMAQI
24th Sep 20255112 AMAQI
24th Sep 2025511 AMAQI
24th Sep 2025492 AMAQI
24th Sep 2025493 AMAQI
24th Sep 2025404 AMAQI
24th Sep 2025465 AMAQI

28°C17/41°C

24th Sep 2025536 AMAQI
24th Sep 2025517 AMAQI
24th Sep 2025518 AMAQI
24th Sep 2025519 AMAQI
24th Sep 20255210 AMAQI
24th Sep 20255411 AMAQI
24th Sep 20255412 PMAQI
24th Sep 2025541 PMAQI
24th Sep 2025532 PMAQI
24th Sep 2025523 PMAQI
24th Sep 2025524 PMAQI
24th Sep 2025565 PMAQI
24th Sep 2025546 PMAQI
24th Sep 2025527 PMAQI
24th Sep 2025538 PMAQI
24th Sep 2025539 PMAQI
24th Sep 20255210 PMAQI
24th Sep 20255211 PMAQI
25th Sep 20255412 AMAQI
25th Sep 2025401 AMAQI
25th Sep 2025372 AMAQI
25th Sep 2025483 AMAQI
25th Sep 2025424 AMAQI
25th Sep 2025375 AMAQI

26°C21/34°C

25th Sep 2025266 AMAQI
25th Sep 2025337 AMAQI
25th Sep 2025368 AMAQI
25th Sep 2025379 AMAQI
25th Sep 20253910 AMAQI
25th Sep 20255211 AMAQI
25th Sep 20254512 PMAQI
25th Sep 2025381 PMAQI
25th Sep 2025352 PMAQI
25th Sep 2025373 PMAQI
25th Sep 2025444 PMAQI
25th Sep 2025455 PMAQI
25th Sep 2025476 PMAQI
25th Sep 2025467 PMAQI
25th Sep 2025448 PMAQI
25th Sep 2025419 PMAQI
25th Sep 20253810 PMAQI
25th Sep 20253611 PMAQI
26th Sep 20253612 AMAQI
26th Sep 2025391 AMAQI
26th Sep 2025382 AMAQI
26th Sep 2025383 AMAQI
26th Sep 2025444 AMAQI
26th Sep 2025365 AMAQI

26°C20/35°C

26th Sep 2025296 AMAQI
26th Sep 2025327 AMAQI
26th Sep 2025488 AMAQI
26th Sep 2025539 AMAQI
26th Sep 20254810 AMAQI
26th Sep 20254511 AMAQI
26th Sep 20254612 PMAQI
26th Sep 2025461 PMAQI
26th Sep 2025462 PMAQI
26th Sep 2025453 PMAQI
26th Sep 2025444 PMAQI
26th Sep 2025445 PMAQI
26th Sep 2025456 PMAQI
26th Sep 2025477 PMAQI
26th Sep 2025488 PMAQI
26th Sep 2025489 PMAQI
26th Sep 20254610 PMAQI
26th Sep 20254211 PMAQI
27th Sep 20254212 AMAQI
27th Sep 2025421 AMAQI
27th Sep 2025422 AMAQI
27th Sep 2025423 AMAQI
27th Sep 2025424 AMAQI
27th Sep 2025445 AMAQI

24°C14/36°C

27th Sep 2025446 AMAQI
27th Sep 2025447 AMAQI
27th Sep 2025448 AMAQI
27th Sep 2025449 AMAQI
27th Sep 20254410 AMAQI
27th Sep 20254411 AMAQI
27th Sep 20254512 PMAQI
27th Sep 2025471 PMAQI
27th Sep 2025482 PMAQI
27th Sep 2025503 PMAQI
27th Sep 2025504 PMAQI
27th Sep 2025525 PMAQI
27th Sep 2025526 PMAQI
27th Sep 2025517 PMAQI
27th Sep 2025508 PMAQI
27th Sep 2025479 PMAQI
27th Sep 20254510 PMAQI
27th Sep 20254311 PMAQI
28th Sep 20254212 AMAQI
28th Sep 2025421 AMAQI
28th Sep 2025422 AMAQI
28th Sep 2025423 AMAQI
28th Sep 2025424 AMAQI
28th Sep 2025425 AMAQI

24°C16/36°C

28th Sep 2025426 AMAQI
28th Sep 2025447 AMAQI
28th Sep 2025448 AMAQI
28th Sep 2025449 AMAQI
28th Sep 20254410 AMAQI
28th Sep 20254411 AMAQI
28th Sep 20254312 PMAQI
28th Sep 2025431 PMAQI
28th Sep 2025432 PMAQI
28th Sep 2025443 PMAQI
28th Sep 2025444 PMAQI
28th Sep 2025435 PMAQI
28th Sep 2025426 PMAQI
28th Sep 2025427 PMAQI
28th Sep 2025398 PMAQI
28th Sep 2025339 PMAQI
28th Sep 20254310 PMAQI
28th Sep 20254211 PMAQI
29th Sep 20254312 AMAQI
29th Sep 2025431 AMAQI
29th Sep 2025442 AMAQI
29th Sep 2025423 AMAQI
29th Sep 2025364 AMAQI
29th Sep 2025185 AMAQI

22°C16/31°C

29th Sep 2025136 AMAQI
29th Sep 2025187 AMAQI
29th Sep 2025288 AMAQI
29th Sep 2025319 AMAQI
29th Sep 20252810 AMAQI
29th Sep 20252511 AMAQI
29th Sep 20252712 PMAQI
29th Sep 2025421 PMAQI
29th Sep 2025492 PMAQI
29th Sep 2025413 PMAQI
29th Sep 2025344 PMAQI
29th Sep 2025355 PMAQI
29th Sep 2025396 PMAQI
29th Sep 2025367 PMAQI
29th Sep 2025338 PMAQI
29th Sep 2025279 PMAQI
29th Sep 20252810 PMAQI
29th Sep 20253211 PMAQI
30th Sep 20253512 AMAQI
30th Sep 2025321 AMAQI
30th Sep 2025392 AMAQI
30th Sep 2025283 AMAQI
30th Sep 2025204 AMAQI
30th Sep 2025265 AMAQI

22°C17/29°C

30th Sep 2025316 AMAQI
30th Sep 2025347 AMAQI
30th Sep 2025238 AMAQI
30th Sep 2025369 AMAQI
30th Sep 20253410 AMAQI
30th Sep 20254111 AMAQI
30th Sep 20254612 PMAQI
30th Sep 2025301 PMAQI
30th Sep 2025302 PMAQI
30th Sep 2025243 PMAQI
30th Sep 2025274 PMAQI
30th Sep 2025225 PMAQI
30th Sep 2025206 PMAQI
30th Sep 2025217 PMAQI
30th Sep 2025188 PMAQI
30th Sep 2025199 PMAQI
30th Sep 20252210 PMAQI
30th Sep 20252811 PMAQI
1st Oct 20252912 AMAQI
1st Oct 2025281 AMAQI
1st Oct 2025252 AMAQI
1st Oct 2025223 AMAQI
1st Oct 2025274 AMAQI
1st Oct 2025245 AMAQI

22°C15/29°C

1st Oct 2025226 AMAQI
1st Oct 2025257 AMAQI
1st Oct 2025268 AMAQI
1st Oct 2025229 AMAQI
1st Oct 20252610 AMAQI
1st Oct 20253811 AMAQI
1st Oct 20254112 PMAQI
1st Oct 2025431 PMAQI
1st Oct 2025462 PMAQI
1st Oct 2025473 PMAQI
1st Oct 2025394 PMAQI
1st Oct 2025355 PMAQI
1st Oct 2025316 PMAQI
1st Oct 2025327 PMAQI
1st Oct 2025328 PMAQI
1st Oct 2025329 PMAQI
1st Oct 20253410 PMAQI
1st Oct 20253311 PMAQI
2nd Oct 20253412 AMAQI
2nd Oct 2025311 AMAQI
2nd Oct 2025232 AMAQI
2nd Oct 2025133 AMAQI
2nd Oct 202594 AMAQI
2nd Oct 2025155 AMAQI

22°C16/30°C

2nd Oct 2025316 AMAQI
2nd Oct 2025277 AMAQI
2nd Oct 2025128 AMAQI
2nd Oct 2025169 AMAQI
2nd Oct 20251510 AMAQI
2nd Oct 20251111 AMAQI
2nd Oct 20251912 PMAQI
2nd Oct 2025141 PMAQI
2nd Oct 202572 PMAQI
2nd Oct 202573 PMAQI
2nd Oct 2025194 PMAQI
2nd Oct 2025365 PMAQI
2nd Oct 2025206 PMAQI
2nd Oct 2025137 PMAQI
2nd Oct 2025148 PMAQI
2nd Oct 2025159 PMAQI
2nd Oct 20251510 PMAQI
2nd Oct 20252311 PMAQI
3rd Oct 20253512 AMAQI
3rd Oct 2025361 AMAQI
3rd Oct 2025372 AMAQI
3rd Oct 2025483 AMAQI
3rd Oct 2025404 AMAQI
3rd Oct 2025515 AMAQI

19°C16/24°C

3rd Oct 2025516 AMAQI
6 AM
3rd Oct 2025417 AMAQI
3rd Oct 2025398 AMAQI
3rd Oct 2025439 AMAQI
3rd Oct 20254710 AMAQI
3rd Oct 20254011 AMAQI
3rd Oct 20255612 PMAQI
12 PM
3rd Oct 2025611 PMAQI
3rd Oct 2025582 PMAQI
3rd Oct 2025223 PMAQI
3rd Oct 2025184 PMAQI
3rd Oct 2025245 PMAQI
3rd Oct 2025446 PMAQI
7 PM
12 AM
5 AM

19°C13/27°C

Day time
Avg. Highest Time
12 PM - 6 PM

40AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
6 AM - 8 AM

33AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 6 PM (Avg. 40), while the lowest AQI was between 6 AM to 8 AM (Avg. 33).
Night time
Avg. Highest Time
12 AM - 3 AM

37AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
4 AM - 5 AM

33AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 37), while the lowest AQI was between 4 AM to 5 AM (Avg. 33).

2025 Days Vs Air Quality

Modesto, California, United States

2025

89%

245

11%

31

Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)

Good
245 Days
Moderate
31 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 89%

Health Risk Level:

Low

In 2025, 89% of 277 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

Modesto, California, 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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
82AQI
2nd January 2025
63AQI
3rd January 2025
65AQI
4th January 2025
44AQI
5th January 2025
46AQI
6th January 2025
51AQI
7th January 2025
25AQI
8th January 2025
40AQI
9th January 2025
72AQI
10th January 2025
67AQI
11th January 2025
47AQI
12th January 2025
26AQI
13th January 2025
44AQI
14th January 2025
42AQI
15th January 2025
58AQI
16th January 2025
67AQI
17th January 2025
69AQI
18th January 2025
56AQI
19th January 2025
77AQI
20th January 2025
51AQI
21st January 2025
57AQI
22nd January 2025
59AQI
23rd January 2025
72AQI
24th January 2025
78AQI
25th January 2025
60AQI
26th January 2025
35AQI
27th January 2025
32AQI
28th January 2025
51AQI
29th January 2025
61AQI
30th January 2025
52AQI
31st January 2025
64AQI
1st February 2025
68AQI
2nd February 2025
32AQI
3rd February 2025
21AQI
4th February 2025
23AQI
5th February 2025
25AQI
6th February 2025
33AQI
7th February 2025
25AQI
8th February 2025
24AQI
9th February 2025
24AQI
10th February 2025
27AQI
11th February 2025
29AQI
12th February 2025
28AQI
13th February 2025
26AQI
14th February 2025
27AQI
15th February 2025
31AQI
16th February 2025
46AQI
17th February 2025
32AQI
18th February 2025
25AQI
19th February 2025
34AQI
20th February 2025
29AQI
21st February 2025
43AQI
22nd February 2025
49AQI
23rd February 2025
51AQI
24th February 2025
36AQI
25th February 2025
26AQI
26th February 2025
37AQI
27th February 2025
53AQI
28th February 2025
51AQI
1st March 2025
45AQI
2nd March 2025
27AQI
3rd March 2025
25AQI
4th March 2025
25AQI
5th March 2025
24AQI
6th March 2025
26AQI
7th March 2025
27AQI
8th March 2025
35AQI
9th March 2025
40AQI
10th March 2025
33AQI
11th March 2025
32AQI
12th March 2025
30AQI
13th March 2025
22AQI
14th March 2025
23AQI
15th March 2025
39AQI
16th March 2025
42AQI
17th March 2025
23AQI
18th March 2025
17AQI
19th March 2025
25AQI
20th March 2025
18AQI
21st March 2025
23AQI
22nd March 2025
20AQI
23rd March 2025
24AQI
24th March 2025
28AQI
25th March 2025
45AQI
26th March 2025
34AQI
27th March 2025
26AQI
28th March 2025
24AQI
29th March 2025
21AQI
30th March 2025
24AQI
31st March 2025
22AQI
1st April 2025
18AQI
2nd April 2025
23AQI
3rd April 2025
28AQI
4th April 2025
20AQI
5th April 2025
22AQI
6th April 2025
29AQI
7th April 2025
17AQI
8th April 2025
18AQI
9th April 2025
25AQI
10th April 2025
31AQI
11th April 2025
19AQI
12th April 2025
29AQI
13th April 2025
32AQI
14th April 2025
32AQI
15th April 2025
37AQI
16th April 2025
38AQI
17th April 2025
30AQI
18th April 2025
32AQI
19th April 2025
37AQI
20th April 2025
34AQI
21st April 2025
31AQI
22nd April 2025
38AQI
23rd April 2025
43AQI
24th April 2025
40AQI
25th April 2025
29AQI
26th April 2025
17AQI
27th April 2025
22AQI
28th April 2025
31AQI
29th April 2025
40AQI
30th April 2025
47AQI
1st May 2025
45AQI
2nd May 2025
36AQI
3rd May 2025
20AQI
4th May 2025
32AQI
5th May 2025
33AQI
6th May 2025
33AQI
7th May 2025
52AQI
8th May 2025
49AQI
9th May 2025
36AQI
10th May 2025
29AQI
11th May 2025
23AQI
12th May 2025
20AQI
13th May 2025
18AQI
14th May 2025
25AQI
15th May 2025
35AQI
16th May 2025
33AQI
17th May 2025
34AQI
18th May 2025
27AQI
19th May 2025
32AQI
20th May 2025
22AQI
21st May 2025
35AQI
22nd May 2025
34AQI
23rd May 2025
26AQI
24th May 2025
31AQI
25th May 2025
23AQI
26th May 2025
17AQI
27th May 2025
27AQI
28th May 2025
35AQI
29th May 2025
22AQI
30th May 2025
35AQI
31st May 2025
39AQI
1st June 2025
35AQI
2nd June 2025
51AQI
3rd June 2025
38AQI
4th June 2025
45AQI
5th June 2025
45AQI
6th June 2025
26AQI
7th June 2025
30AQI
8th June 2025
25AQI
9th June 2025
26AQI
10th June 2025
29AQI
11th June 2025
46AQI
12th June 2025
48AQI
13th June 2025
38AQI
14th June 2025
34AQI
15th June 2025
37AQI
16th June 2025
40AQI
17th June 2025
32AQI
18th June 2025
39AQI
19th June 2025
40AQI
20th June 2025
39AQI
21st June 2025
31AQI
22nd June 2025
28AQI
23rd June 2025
32AQI
24th June 2025
26AQI
25th June 2025
26AQI
26th June 2025
28AQI
27th June 2025
35AQI
28th June 2025
40AQI
29th June 2025
38AQI
30th June 2025
33AQI
1st July 2025
30AQI
2nd July 2025
34AQI
3rd July 2025
40AQI
4th July 2025
31AQI
5th July 2025
45AQI
6th July 2025
33AQI
7th July 2025
35AQI
8th July 2025
26AQI
9th July 2025
21AQI
10th July 2025
31AQI
11th July 2025
51AQI
12th July 2025
55AQI
13th July 2025
43AQI
14th July 2025
32AQI
15th July 2025
28AQI
16th July 2025
29AQI
17th July 2025
24AQI
18th July 2025
23AQI
19th July 2025
26AQI
20th July 2025
25AQI
21st July 2025
28AQI
22nd July 2025
18AQI
23rd July 2025
19AQI
24th July 2025
19AQI
25th July 2025
17AQI
26th July 2025
16AQI
27th July 2025
17AQI
28th July 2025
21AQI
29th July 2025
22AQI
30th July 2025
26AQI
31st July 2025
32AQI
1st August 2025
37AQI
2nd August 2025
28AQI
3rd August 2025
28AQI
4th August 2025
31AQI
5th August 2025
26AQI
6th August 2025
34AQI
7th August 2025
28AQI
8th August 2025
32AQI
9th August 2025
40AQI
10th August 2025
33AQI
11th August 2025
32AQI
12th August 2025
36AQI
13th August 2025
31AQI
14th August 2025
28AQI
15th August 2025
37AQI
16th August 2025
20AQI
17th August 2025
16AQI
18th August 2025
21AQI
19th August 2025
25AQI
20th August 2025
32AQI
21st August 2025
45AQI
22nd August 2025
53AQI
23rd August 2025
49AQI
24th August 2025
38AQI
25th August 2025
38AQI
26th August 2025
41AQI
27th August 2025
48AQI
28th August 2025
49AQI
29th August 2025
36AQI
30th August 2025
36AQI
31st August 2025
36AQI
1st September 2025
34AQI
2nd September 2025
47AQI
3rd September 2025
44AQI
4th September 2025
37AQI
5th September 2025
38AQI
6th September 2025
39AQI
7th September 2025
29AQI
8th September 2025
25AQI
9th September 2025
20AQI
10th September 2025
21AQI
11th September 2025
31AQI
12th September 2025
36AQI
13th September 2025
42AQI
14th September 2025
38AQI
15th September 2025
36AQI
16th September 2025
47AQI
17th September 2025
41AQI
18th September 2025
41AQI
19th September 2025
49AQI
20th September 2025
45AQI
21st September 2025
35AQI
22nd September 2025
36AQI
23rd September 2025
44AQI
24th September 2025
51AQI
25th September 2025
41AQI
26th September 2025
43AQI
27th September 2025
46AQI
28th September 2025
42AQI
29th September 2025
33AQI
30th September 2025
28AQI
1st October 2025
30AQI
2nd October 2025
19AQI
3rd October 2025
41AQI
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

55AQI

34AQI

28AQI

30AQI

31AQI

35AQI

29AQI

34AQI

38AQI

30AQI

No. of days

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

202535AQI

10
21
24
4
31
30
30
1
29
1
29
2
30
1
29
1
3
245
31

Highest AQI recorded in

January

55AQI

Lowest AQI recorded in

March

28AQI

202441AQI

24
7
25
4
31
30
31
24
6
20
11
27
4
14
2
22
9
23
7
13
17
1
284
67
1

Highest AQI recorded in

December

61AQI

Lowest AQI recorded in

March

30AQI

202368AQI

15
9
1
6
13
14
1
31
27
1
31
22
1
1
6
21
10
25
6
20
8
1
1
15
8
1
7
13
16
12
15
4
245
88
7
3
19

Highest AQI recorded in

October

141AQI

Lowest AQI recorded in

March

32AQI

202252AQI

1
24
5
6
16
26
5
15
3
24
7
27
3
20
1
2
1
22
8
19
12
14
13
3
15
15
1
191
108
9

Highest AQI recorded in

January

83AQI

Lowest AQI recorded in

July

39AQI

202155AQI

8
19
3
17
10
1
24
7
25
5
25
6
25
5
20
11
6
17
7
1
9
21
15
14
2
7
20
3
15
14
2
196
149
18
1

Highest AQI recorded in

August

76AQI

Lowest AQI recorded in

June

40AQI

202056AQI

13
20
18
30
29
2
17
7
4
3
7
12
6
4
1
5
22
1
3
9
20
1
8
21
2
156
84
14
10
1

Highest AQI recorded in

September

95AQI

Lowest AQI recorded in

May

28AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
68AQI
Least Polluted Year Recorded
2025(Avg.)
35AQI

Modesto's annual 2025 AQI (35) shows an average percentage change of -33.7% (improved AQI) compared to previous years: 2020 (56), 2021 (55), 2022 (52), 2023 (68), 2024 (41).