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Upland, 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

Upland, California, United States

2021
2022
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
7th Oct 2022
124AQI
Lowest AQI recorded on
27th Oct 2021
16AQI

Same Day Analysis (2nd October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 44 of Good air quality, showing improvement over 2024 and 2022 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

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

Upland, California, United States

AQI
Day
Night
.

6 AM2nd Oct 2025

6 PM

5 AM3rd Oct 2025

Day time
Avg. Highest Time
2PM2nd Oct

62AQI

Avg. Lowest Time
6PM2nd Oct

33AQI

Night time
Avg. Highest Time
9PM2nd Oct

55AQI

Avg. Lowest Time
4AM3rd Oct

36AQI

In the last 24 hours,

Upland's AQI reached its highest point of 62 at 2 PM during the Day, while the lowest point, 33, was recorded at 6 PM during the Day between 2nd Oct and 3rd Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Upland, 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 2025486 AMAQI
3rd Sep 2025567 AMAQI
3rd Sep 2025478 AMAQI
3rd Sep 2025489 AMAQI
3rd Sep 20255110 AMAQI
3rd Sep 20255311 AMAQI
3rd Sep 20255012 PMAQI
3rd Sep 2025521 PMAQI
3rd Sep 2025522 PMAQI
3rd Sep 2025483 PMAQI
3rd Sep 2025434 PMAQI
3rd Sep 2025395 PMAQI
3rd Sep 2025436 PMAQI
3rd Sep 2025427 PMAQI
3rd Sep 2025458 PMAQI
3rd Sep 2025479 PMAQI
3rd Sep 20254610 PMAQI
3rd Sep 20254411 PMAQI
4th Sep 20256512 AMAQI
4th Sep 20251381 AMAQI
4th Sep 2025752 AMAQI
4th Sep 2025493 AMAQI
4th Sep 2025464 AMAQI
4th Sep 2025465 AMAQI

28°C23/36°C

4th Sep 2025426 AMAQI
4th Sep 2025447 AMAQI
4th Sep 2025498 AMAQI
4th Sep 2025459 AMAQI
4th Sep 20254210 AMAQI
4th Sep 20255011 AMAQI
4th Sep 20254512 PMAQI
4th Sep 2025481 PMAQI
4th Sep 2025482 PMAQI
4th Sep 2025463 PMAQI
4th Sep 2025454 PMAQI
4th Sep 2025455 PMAQI
4th Sep 2025456 PMAQI
4th Sep 2025497 PMAQI
4th Sep 2025438 PMAQI
4th Sep 2025419 PMAQI
4th Sep 20255110 PMAQI
4th Sep 20254011 PMAQI
5th Sep 20254012 AMAQI
5th Sep 2025401 AMAQI
5th Sep 2025382 AMAQI
5th Sep 2025383 AMAQI
5th Sep 2025424 AMAQI
5th Sep 2025445 AMAQI

27°C22/36°C

5th Sep 2025486 AMAQI
5th Sep 2025477 AMAQI
5th Sep 2025448 AMAQI
5th Sep 2025489 AMAQI
5th Sep 20254410 AMAQI
5th Sep 20254711 AMAQI
5th Sep 20255012 PMAQI
5th Sep 2025491 PMAQI
5th Sep 2025442 PMAQI
5th Sep 2025423 PMAQI
5th Sep 2025374 PMAQI
5th Sep 2025345 PMAQI
5th Sep 2025346 PMAQI
5th Sep 2025477 PMAQI
5th Sep 2025368 PMAQI
5th Sep 2025389 PMAQI
5th Sep 20253810 PMAQI
5th Sep 20253811 PMAQI
6th Sep 20254312 AMAQI
6th Sep 2025461 AMAQI
6th Sep 2025422 AMAQI
6th Sep 2025443 AMAQI
6th Sep 2025514 AMAQI
6th Sep 2025515 AMAQI

27°C20/35°C

6th Sep 2025486 AMAQI
6th Sep 2025447 AMAQI
6th Sep 2025418 AMAQI
6th Sep 2025399 AMAQI
6th Sep 20254410 AMAQI
6th Sep 20255011 AMAQI
6th Sep 20255312 PMAQI
6th Sep 2025541 PMAQI
6th Sep 2025542 PMAQI
6th Sep 2025463 PMAQI
6th Sep 2025404 PMAQI
6th Sep 2025385 PMAQI
6th Sep 2025286 PMAQI
6th Sep 2025397 PMAQI
6th Sep 2025348 PMAQI
6th Sep 2025239 PMAQI
6th Sep 20252310 PMAQI
6th Sep 20253411 PMAQI
7th Sep 20253512 AMAQI
7th Sep 2025381 AMAQI
7th Sep 2025452 AMAQI
7th Sep 2025473 AMAQI
7th Sep 2025504 AMAQI
7th Sep 2025495 AMAQI

27°C22/36°C

7th Sep 2025466 AMAQI
7th Sep 2025497 AMAQI
7th Sep 2025528 AMAQI
7th Sep 2025519 AMAQI
7th Sep 20255210 AMAQI
7th Sep 20254811 AMAQI
7th Sep 20254212 PMAQI
7th Sep 2025421 PMAQI
7th Sep 2025342 PMAQI
7th Sep 2025273 PMAQI
7th Sep 2025264 PMAQI
7th Sep 2025255 PMAQI
7th Sep 2025256 PMAQI
7th Sep 2025427 PMAQI
7th Sep 2025348 PMAQI
7th Sep 2025289 PMAQI
7th Sep 20252410 PMAQI
7th Sep 20252611 PMAQI
8th Sep 20253012 AMAQI
8th Sep 2025281 AMAQI
8th Sep 2025292 AMAQI
8th Sep 2025343 AMAQI
8th Sep 2025324 AMAQI
8th Sep 2025325 AMAQI

27°C21/36°C

8th Sep 2025336 AMAQI
8th Sep 2025337 AMAQI
8th Sep 2025368 AMAQI
8th Sep 2025349 AMAQI
8th Sep 20253310 AMAQI
8th Sep 20254111 AMAQI
8th Sep 20254412 PMAQI
8th Sep 2025331 PMAQI
8th Sep 2025272 PMAQI
8th Sep 2025243 PMAQI
8th Sep 2025224 PMAQI
8th Sep 2025205 PMAQI
8th Sep 2025206 PMAQI
8th Sep 2025287 PMAQI
8th Sep 2025238 PMAQI
8th Sep 2025189 PMAQI
8th Sep 20251810 PMAQI
8th Sep 20252011 PMAQI
9th Sep 20252112 AMAQI
9th Sep 2025201 AMAQI
9th Sep 2025202 AMAQI
9th Sep 2025243 AMAQI
9th Sep 2025224 AMAQI
9th Sep 2025225 AMAQI

25°C20/34°C

9th Sep 2025306 AMAQI
9th Sep 2025317 AMAQI
9th Sep 2025278 AMAQI
9th Sep 2025309 AMAQI
9th Sep 20253410 AMAQI
9th Sep 20253811 AMAQI
9th Sep 20253612 PMAQI
9th Sep 2025351 PMAQI
9th Sep 2025352 PMAQI
9th Sep 2025393 PMAQI
9th Sep 2025404 PMAQI
9th Sep 2025385 PMAQI
9th Sep 2025346 PMAQI
9th Sep 2025257 PMAQI
9th Sep 2025288 PMAQI
9th Sep 2025369 PMAQI
9th Sep 20253710 PMAQI
9th Sep 20253111 PMAQI
10th Sep 20253212 AMAQI
10th Sep 2025311 AMAQI
10th Sep 2025322 AMAQI
10th Sep 2025353 AMAQI
10th Sep 2025344 AMAQI
10th Sep 2025305 AMAQI

22°C17/30°C

10th Sep 2025296 AMAQI
10th Sep 2025267 AMAQI
10th Sep 2025268 AMAQI
10th Sep 2025309 AMAQI
10th Sep 20253410 AMAQI
10th Sep 20253111 AMAQI
10th Sep 20253812 PMAQI
10th Sep 2025291 PMAQI
10th Sep 2025302 PMAQI
10th Sep 2025303 PMAQI
10th Sep 2025314 PMAQI
10th Sep 2025265 PMAQI
10th Sep 2025256 PMAQI
10th Sep 2025307 PMAQI
10th Sep 2025298 PMAQI
10th Sep 2025309 PMAQI
10th Sep 20252910 PMAQI
10th Sep 20252711 PMAQI
11th Sep 20252912 AMAQI
11th Sep 2025271 AMAQI
11th Sep 2025262 AMAQI
11th Sep 2025273 AMAQI
11th Sep 2025304 AMAQI
11th Sep 2025345 AMAQI

19°C15/26°C

11th Sep 2025356 AMAQI
11th Sep 2025307 AMAQI
11th Sep 2025278 AMAQI
11th Sep 2025309 AMAQI
11th Sep 20253410 AMAQI
11th Sep 20253711 AMAQI
11th Sep 20253812 PMAQI
11th Sep 2025371 PMAQI
11th Sep 2025352 PMAQI
11th Sep 2025363 PMAQI
11th Sep 2025324 PMAQI
11th Sep 2025285 PMAQI
11th Sep 2025296 PMAQI
11th Sep 2025277 PMAQI
11th Sep 2025308 PMAQI
11th Sep 2025319 PMAQI
11th Sep 20253110 PMAQI
11th Sep 20252811 PMAQI
12th Sep 20252912 AMAQI
12th Sep 2025291 AMAQI
12th Sep 2025272 AMAQI
12th Sep 2025263 AMAQI
12th Sep 2025284 AMAQI
12th Sep 2025325 AMAQI

19°C14/25°C

12th Sep 2025326 AMAQI
12th Sep 2025327 AMAQI
12th Sep 2025348 AMAQI
12th Sep 2025379 AMAQI
12th Sep 20253410 AMAQI
12th Sep 20253611 AMAQI
12th Sep 20253612 PMAQI
12th Sep 2025381 PMAQI
12th Sep 2025362 PMAQI
12th Sep 2025373 PMAQI
12th Sep 2025384 PMAQI
12th Sep 2025385 PMAQI
12th Sep 2025376 PMAQI
12th Sep 2025337 PMAQI
12th Sep 2025368 PMAQI
12th Sep 2025429 PMAQI
12th Sep 20253810 PMAQI
12th Sep 20254011 PMAQI
13th Sep 20254112 AMAQI
13th Sep 2025451 AMAQI
13th Sep 2025442 AMAQI
13th Sep 2025383 AMAQI
13th Sep 2025394 AMAQI
13th Sep 2025435 AMAQI

19°C15/25°C

13th Sep 2025446 AMAQI
13th Sep 2025447 AMAQI
13th Sep 2025448 AMAQI
13th Sep 2025469 AMAQI
13th Sep 20255110 AMAQI
13th Sep 20255011 AMAQI
13th Sep 20254812 PMAQI
13th Sep 2025461 PMAQI
13th Sep 2025502 PMAQI
13th Sep 2025543 PMAQI
13th Sep 2025554 PMAQI
13th Sep 2025545 PMAQI
13th Sep 2025526 PMAQI
13th Sep 2025477 PMAQI
13th Sep 2025498 PMAQI
13th Sep 2025539 PMAQI
13th Sep 20255310 PMAQI
13th Sep 20255211 PMAQI
14th Sep 20255212 AMAQI
14th Sep 2025511 AMAQI
14th Sep 2025522 AMAQI
14th Sep 2025503 AMAQI
14th Sep 2025514 AMAQI
14th Sep 2025515 AMAQI

20°C15/29°C

14th Sep 2025506 AMAQI
14th Sep 2025517 AMAQI
14th Sep 2025528 AMAQI
14th Sep 2025539 AMAQI
14th Sep 20255410 AMAQI
14th Sep 20255711 AMAQI
14th Sep 20255812 PMAQI
14th Sep 2025601 PMAQI
14th Sep 2025622 PMAQI
14th Sep 2025643 PMAQI
14th Sep 2025614 PMAQI
14th Sep 2025575 PMAQI
14th Sep 2025616 PMAQI
14th Sep 2025547 PMAQI
14th Sep 2025548 PMAQI
14th Sep 2025549 PMAQI
14th Sep 20255610 PMAQI
14th Sep 20255411 PMAQI
15th Sep 20255312 AMAQI
15th Sep 2025541 AMAQI
15th Sep 2025532 AMAQI
15th Sep 2025543 AMAQI
15th Sep 2025544 AMAQI
15th Sep 2025535 AMAQI

23°C16/32°C

15th Sep 2025556 AMAQI
15th Sep 2025487 AMAQI
15th Sep 2025428 AMAQI
15th Sep 2025599 AMAQI
15th Sep 20255610 AMAQI
15th Sep 20255911 AMAQI
15th Sep 20255812 PMAQI
15th Sep 2025541 PMAQI
15th Sep 2025542 PMAQI
15th Sep 2025523 PMAQI
15th Sep 2025514 PMAQI
15th Sep 2025555 PMAQI
15th Sep 2025446 PMAQI
15th Sep 2025497 PMAQI
15th Sep 2025448 PMAQI
15th Sep 2025409 PMAQI
15th Sep 20254410 PMAQI
15th Sep 20254811 PMAQI
16th Sep 20255012 AMAQI
16th Sep 2025541 AMAQI
16th Sep 2025572 AMAQI
16th Sep 2025563 AMAQI
16th Sep 2025574 AMAQI
16th Sep 2025585 AMAQI

25°C19/35°C

16th Sep 2025556 AMAQI
16th Sep 2025567 AMAQI
16th Sep 2025588 AMAQI
16th Sep 2025559 AMAQI
16th Sep 20255610 AMAQI
16th Sep 20255811 AMAQI
16th Sep 20256012 PMAQI
16th Sep 2025511 PMAQI
16th Sep 2025502 PMAQI
16th Sep 2025523 PMAQI
16th Sep 2025434 PMAQI
16th Sep 2025405 PMAQI
16th Sep 2025476 PMAQI
16th Sep 2025507 PMAQI
16th Sep 2025518 PMAQI
16th Sep 2025439 PMAQI
16th Sep 20253810 PMAQI
16th Sep 20254211 PMAQI
17th Sep 20253512 AMAQI
17th Sep 2025361 AMAQI
17th Sep 2025382 AMAQI
17th Sep 2025393 AMAQI
17th Sep 2025444 AMAQI
17th Sep 2025455 AMAQI

28°C22/37°C

17th Sep 2025416 AMAQI
17th Sep 2025407 AMAQI
17th Sep 2025448 AMAQI
17th Sep 2025409 AMAQI
17th Sep 20254710 AMAQI
17th Sep 20254611 AMAQI
17th Sep 20254512 PMAQI
17th Sep 2025451 PMAQI
17th Sep 2025422 PMAQI
17th Sep 2025383 PMAQI
17th Sep 2025364 PMAQI
17th Sep 2025345 PMAQI
17th Sep 2025386 PMAQI
17th Sep 2025407 PMAQI
17th Sep 2025438 PMAQI
17th Sep 2025409 PMAQI
17th Sep 20254010 PMAQI
17th Sep 20253611 PMAQI
18th Sep 20253812 AMAQI
18th Sep 2025391 AMAQI
18th Sep 2025422 AMAQI
18th Sep 2025443 AMAQI
18th Sep 2025404 AMAQI
18th Sep 2025365 AMAQI

26°C21/34°C

18th Sep 2025336 AMAQI
18th Sep 2025327 AMAQI
18th Sep 2025348 AMAQI
18th Sep 2025309 AMAQI
18th Sep 20253310 AMAQI
18th Sep 20253311 AMAQI
18th Sep 20253612 PMAQI
18th Sep 2025341 PMAQI
18th Sep 2025322 PMAQI
18th Sep 2025333 PMAQI
18th Sep 2025334 PMAQI
18th Sep 2025365 PMAQI
18th Sep 2025346 PMAQI
18th Sep 2025357 PMAQI
18th Sep 2025348 PMAQI
18th Sep 2025329 PMAQI
18th Sep 20253210 PMAQI
18th Sep 20253011 PMAQI
19th Sep 20253312 AMAQI
19th Sep 2025341 AMAQI
19th Sep 2025362 AMAQI
19th Sep 2025333 AMAQI
19th Sep 2025344 AMAQI
19th Sep 2025365 AMAQI

23°C17/29°C

19th Sep 2025346 AMAQI
19th Sep 2025367 AMAQI
19th Sep 2025418 AMAQI
19th Sep 2025369 AMAQI
19th Sep 20253610 AMAQI
19th Sep 20253811 AMAQI
19th Sep 20254112 PMAQI
19th Sep 2025411 PMAQI
19th Sep 2025392 PMAQI
19th Sep 2025343 PMAQI
19th Sep 2025324 PMAQI
19th Sep 2025295 PMAQI
19th Sep 2025296 PMAQI
19th Sep 2025317 PMAQI
19th Sep 2025328 PMAQI
19th Sep 2025299 PMAQI
19th Sep 20252810 PMAQI
19th Sep 20252611 PMAQI
20th Sep 20252812 AMAQI
20th Sep 2025351 AMAQI
20th Sep 2025352 AMAQI
20th Sep 2025363 AMAQI
20th Sep 2025274 AMAQI
20th Sep 2025305 AMAQI

22°C19/30°C

20th Sep 2025306 AMAQI
20th Sep 2025267 AMAQI
20th Sep 2025268 AMAQI
20th Sep 2025289 AMAQI
20th Sep 20252610 AMAQI
20th Sep 20253011 AMAQI
20th Sep 20253012 PMAQI
20th Sep 2025301 PMAQI
20th Sep 2025292 PMAQI
20th Sep 2025283 PMAQI
20th Sep 2025254 PMAQI
20th Sep 2025245 PMAQI
20th Sep 2025246 PMAQI
20th Sep 2025267 PMAQI
20th Sep 2025268 PMAQI
20th Sep 2025279 PMAQI
20th Sep 20253110 PMAQI
20th Sep 20253211 PMAQI
21st Sep 20253212 AMAQI
21st Sep 2025321 AMAQI
21st Sep 2025342 AMAQI
21st Sep 2025343 AMAQI
21st Sep 2025354 AMAQI
21st Sep 2025375 AMAQI

23°C18/32°C

21st Sep 2025346 AMAQI
21st Sep 2025307 AMAQI
21st Sep 2025308 AMAQI
21st Sep 2025319 AMAQI
21st Sep 20253110 AMAQI
21st Sep 20253411 AMAQI
21st Sep 20253312 PMAQI
21st Sep 2025321 PMAQI
21st Sep 2025322 PMAQI
21st Sep 2025353 PMAQI
21st Sep 2025364 PMAQI
21st Sep 2025375 PMAQI
21st Sep 2025366 PMAQI
21st Sep 2025317 PMAQI
21st Sep 2025298 PMAQI
21st Sep 2025289 PMAQI
21st Sep 20253010 PMAQI
21st Sep 20253311 PMAQI
22nd Sep 20253212 AMAQI
22nd Sep 2025321 AMAQI
22nd Sep 2025322 AMAQI
22nd Sep 2025363 AMAQI
22nd Sep 2025404 AMAQI
22nd Sep 2025385 AMAQI

24°C18/33°C

22nd Sep 2025366 AMAQI
22nd Sep 2025377 AMAQI
22nd Sep 2025388 AMAQI
22nd Sep 2025379 AMAQI
22nd Sep 20253510 AMAQI
22nd Sep 20254411 AMAQI
22nd Sep 20253812 PMAQI
22nd Sep 2025361 PMAQI
22nd Sep 2025352 PMAQI
22nd Sep 2025343 PMAQI
22nd Sep 2025334 PMAQI
22nd Sep 2025305 PMAQI
22nd Sep 2025326 PMAQI
22nd Sep 2025337 PMAQI
22nd Sep 2025328 PMAQI
22nd Sep 2025349 PMAQI
22nd Sep 20253510 PMAQI
22nd Sep 20253711 PMAQI
23rd Sep 20253612 AMAQI
23rd Sep 2025381 AMAQI
23rd Sep 2025402 AMAQI
23rd Sep 2025403 AMAQI
23rd Sep 2025394 AMAQI
23rd Sep 2025395 AMAQI

25°C18/35°C

23rd Sep 2025416 AMAQI
23rd Sep 2025437 AMAQI
23rd Sep 2025428 AMAQI
23rd Sep 2025399 AMAQI
23rd Sep 20253910 AMAQI
23rd Sep 20254011 AMAQI
23rd Sep 20253912 PMAQI
23rd Sep 2025411 PMAQI
23rd Sep 2025452 PMAQI
23rd Sep 2025363 PMAQI
23rd Sep 2025324 PMAQI
23rd Sep 2025325 PMAQI
23rd Sep 2025336 PMAQI
23rd Sep 2025387 PMAQI
23rd Sep 2025378 PMAQI
23rd Sep 2025409 PMAQI
23rd Sep 20254210 PMAQI
23rd Sep 20254311 PMAQI
24th Sep 20254212 AMAQI
24th Sep 2025441 AMAQI
24th Sep 2025442 AMAQI
24th Sep 2025443 AMAQI
24th Sep 2025444 AMAQI
24th Sep 2025505 AMAQI

28°C20/38°C

24th Sep 2025516 AMAQI
24th Sep 2025487 AMAQI
24th Sep 2025498 AMAQI
24th Sep 2025469 AMAQI
24th Sep 20254510 AMAQI
24th Sep 20254611 AMAQI
24th Sep 20255112 PMAQI
24th Sep 2025461 PMAQI
24th Sep 2025482 PMAQI
24th Sep 2025443 PMAQI
24th Sep 2025424 PMAQI
24th Sep 2025365 PMAQI
24th Sep 2025386 PMAQI
24th Sep 2025437 PMAQI
24th Sep 2025418 PMAQI
24th Sep 2025349 PMAQI
24th Sep 20253210 PMAQI
24th Sep 20253411 PMAQI
25th Sep 20254712 AMAQI
25th Sep 2025471 AMAQI
25th Sep 2025422 AMAQI
25th Sep 2025393 AMAQI
25th Sep 2025414 AMAQI
25th Sep 2025445 AMAQI

26°C20/35°C

25th Sep 2025486 AMAQI
25th Sep 2025537 AMAQI
25th Sep 2025528 AMAQI
25th Sep 2025559 AMAQI
25th Sep 20255310 AMAQI
25th Sep 20255711 AMAQI
25th Sep 20256012 PMAQI
25th Sep 2025621 PMAQI
25th Sep 2025642 PMAQI
25th Sep 2025603 PMAQI
25th Sep 2025594 PMAQI
25th Sep 2025595 PMAQI
25th Sep 2025576 PMAQI
25th Sep 2025587 PMAQI
25th Sep 2025448 PMAQI
25th Sep 2025359 PMAQI
25th Sep 20253910 PMAQI
25th Sep 20253911 PMAQI
26th Sep 20253512 AMAQI
26th Sep 2025361 AMAQI
26th Sep 2025392 AMAQI
26th Sep 2025483 AMAQI
26th Sep 2025534 AMAQI
26th Sep 2025515 AMAQI

23°C18/31°C

26th Sep 2025446 AMAQI
26th Sep 2025407 AMAQI
26th Sep 2025388 AMAQI
26th Sep 2025299 AMAQI
26th Sep 20253210 AMAQI
26th Sep 20253711 AMAQI
26th Sep 20253112 PMAQI
26th Sep 2025301 PMAQI
26th Sep 2025342 PMAQI
26th Sep 2025373 PMAQI
26th Sep 2025374 PMAQI
26th Sep 2025425 PMAQI
26th Sep 2025376 PMAQI
26th Sep 2025327 PMAQI
26th Sep 2025328 PMAQI
26th Sep 2025339 PMAQI
26th Sep 20253310 PMAQI
26th Sep 20252911 PMAQI
27th Sep 20252512 AMAQI
27th Sep 2025311 AMAQI
27th Sep 2025302 AMAQI
27th Sep 2025353 AMAQI
27th Sep 2025374 AMAQI
27th Sep 2025335 AMAQI

19°C17/24°C

27th Sep 2025316 AMAQI
27th Sep 2025287 AMAQI
27th Sep 2025248 AMAQI
27th Sep 2025199 AMAQI
27th Sep 20252010 AMAQI
27th Sep 20253011 AMAQI
27th Sep 20253312 PMAQI
27th Sep 2025301 PMAQI
27th Sep 2025222 PMAQI
27th Sep 2025173 PMAQI
27th Sep 2025304 PMAQI
27th Sep 2025435 PMAQI
27th Sep 2025356 PMAQI
27th Sep 2025407 PMAQI
27th Sep 2025418 PMAQI
27th Sep 2025339 PMAQI
27th Sep 20253010 PMAQI
27th Sep 20252311 PMAQI
28th Sep 20252312 AMAQI
28th Sep 2025281 AMAQI
28th Sep 2025322 AMAQI
28th Sep 2025323 AMAQI
28th Sep 2025264 AMAQI
28th Sep 2025185 AMAQI

20°C17/28°C

28th Sep 2025186 AMAQI
28th Sep 2025267 AMAQI
28th Sep 2025398 AMAQI
28th Sep 2025379 AMAQI
28th Sep 20253510 AMAQI
28th Sep 20254011 AMAQI
28th Sep 20254612 PMAQI
28th Sep 2025531 PMAQI
28th Sep 2025532 PMAQI
28th Sep 2025533 PMAQI
28th Sep 2025514 PMAQI
28th Sep 2025505 PMAQI
28th Sep 2025526 PMAQI
28th Sep 2025517 PMAQI
28th Sep 2025508 PMAQI
28th Sep 2025559 PMAQI
28th Sep 20255810 PMAQI
28th Sep 20255611 PMAQI
29th Sep 20255612 AMAQI
29th Sep 2025581 AMAQI
29th Sep 2025602 AMAQI
29th Sep 2025583 AMAQI
29th Sep 2025564 AMAQI
29th Sep 2025545 AMAQI

21°C16/29°C

29th Sep 2025536 AMAQI
29th Sep 2025497 AMAQI
29th Sep 2025518 AMAQI
29th Sep 2025469 AMAQI
29th Sep 20255010 AMAQI
29th Sep 20255111 AMAQI
29th Sep 20255812 PMAQI
29th Sep 2025641 PMAQI
29th Sep 2025572 PMAQI
29th Sep 2025583 PMAQI
29th Sep 2025544 PMAQI
29th Sep 2025595 PMAQI
29th Sep 2025556 PMAQI
29th Sep 2025497 PMAQI
29th Sep 2025538 PMAQI
29th Sep 2025519 PMAQI
29th Sep 20255610 PMAQI
29th Sep 20255411 PMAQI
30th Sep 20255012 AMAQI
30th Sep 2025531 AMAQI
30th Sep 2025552 AMAQI
30th Sep 2025833 AMAQI
30th Sep 2025754 AMAQI
30th Sep 2025445 AMAQI

21°C15/30°C

30th Sep 2025506 AMAQI
30th Sep 2025477 AMAQI
30th Sep 2025498 AMAQI
30th Sep 2025489 AMAQI
30th Sep 20255210 AMAQI
30th Sep 20254411 AMAQI
30th Sep 20254912 PMAQI
30th Sep 2025511 PMAQI
30th Sep 2025472 PMAQI
30th Sep 2025473 PMAQI
30th Sep 2025464 PMAQI
30th Sep 2025555 PMAQI
30th Sep 2025536 PMAQI
30th Sep 2025487 PMAQI
30th Sep 2025548 PMAQI
30th Sep 2025569 PMAQI
30th Sep 20256410 PMAQI
30th Sep 20256511 PMAQI
1st Oct 20256412 AMAQI
1st Oct 2025641 AMAQI
1st Oct 2025652 AMAQI
1st Oct 2025633 AMAQI
1st Oct 2025544 AMAQI
1st Oct 2025635 AMAQI

20°C16/28°C

1st Oct 2025626 AMAQI
1st Oct 2025597 AMAQI
1st Oct 2025628 AMAQI
1st Oct 2025599 AMAQI
1st Oct 20255910 AMAQI
1st Oct 20256111 AMAQI
1st Oct 20256812 PMAQI
1st Oct 2025681 PMAQI
1st Oct 2025612 PMAQI
1st Oct 2025583 PMAQI
1st Oct 2025594 PMAQI
1st Oct 2025525 PMAQI
1st Oct 2025556 PMAQI
1st Oct 2025527 PMAQI
1st Oct 2025488 PMAQI
1st Oct 2025409 PMAQI
1st Oct 20254010 PMAQI
1st Oct 20253211 PMAQI
2nd Oct 20254012 AMAQI
2nd Oct 2025391 AMAQI
2nd Oct 2025352 AMAQI
2nd Oct 2025383 AMAQI
2nd Oct 2025514 AMAQI
2nd Oct 2025515 AMAQI

20°C14/30°C

2nd Oct 2025426 AMAQI
2nd Oct 2025407 AMAQI
2nd Oct 2025408 AMAQI
2nd Oct 2025499 AMAQI
2nd Oct 20254410 AMAQI
2nd Oct 20254711 AMAQI
2nd Oct 20255312 PMAQI
2nd Oct 2025611 PMAQI
2nd Oct 2025622 PMAQI
2nd Oct 2025593 PMAQI
2nd Oct 2025454 PMAQI
2nd Oct 2025395 PMAQI
2nd Oct 2025336 PMAQI
2nd Oct 2025387 PMAQI
2nd Oct 2025518 PMAQI
2nd Oct 2025559 PMAQI
2nd Oct 20254810 PMAQI
2nd Oct 20254411 PMAQI
3rd Oct 20254512 AMAQI
3rd Oct 2025401 AMAQI
3rd Oct 2025422 AMAQI
3rd Oct 2025373 AMAQI
3rd Oct 2025364 AMAQI
3rd Oct 2025485 AMAQI

21°C14/30°C

3rd Oct 2025476 AMAQI
6 AM
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
12 PM - 2 PM

45AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
4 PM - 6 PM

40AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 2 PM (Avg. 45), while the lowest AQI was between 4 PM to 6 PM (Avg. 40).
Night time
Avg. Highest Time
1 AM - 5 AM

43AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
7 PM - 11 PM

39AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 5 AM (Avg. 43), while the lowest AQI was between 7 PM to 11 PM (Avg. 39).

2025 Days Vs Air Quality

Upland, California, United States

2025

71%

194

29%

81

Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)

Good
194 Days
Moderate
81 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 71%

Health Risk Level:

Low

In 2025, 71% of 276 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

Upland, 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
97AQI
2nd January 2025
68AQI
3rd January 2025
55AQI
4th January 2025
77AQI
5th January 2025
44AQI
6th January 2025
40AQI
7th January 2025
50AQI
8th January 2025
61AQI
9th January 2025
49AQI
10th January 2025
53AQI
11th January 2025
62AQI
12th January 2025
31AQI
13th January 2025
33AQI
14th January 2025
30AQI
15th January 2025
29AQI
16th January 2025
30AQI
17th January 2025
40AQI
18th January 2025
55AQI
19th January 2025
63AQI
20th January 2025
55AQI
21st January 2025
31AQI
22nd January 2025
36AQI
23rd January 2025
34AQI
24th January 2025
36AQI
25th January 2025
50AQI
26th January 2025
34AQI
27th January 2025
33AQI
28th January 2025
45AQI
29th January 2025
49AQI
30th January 2025
58AQI
31st January 2025
61AQI
1st February 2025
67AQI
2nd February 2025
72AQI
3rd February 2025
66AQI
4th February 2025
49AQI
5th February 2025
25AQI
6th February 2025
32AQI
7th February 2025
23AQI
8th February 2025
30AQI
9th February 2025
43AQI
10th February 2025
41AQI
11th February 2025
31AQI
12th February 2025
30AQI
13th February 2025
24AQI
14th February 2025
27AQI
15th February 2025
30AQI
16th February 2025
34AQI
17th February 2025
43AQI
18th February 2025
40AQI
19th February 2025
44AQI
20th February 2025
45AQI
21st February 2025
31AQI
22nd February 2025
35AQI
23rd February 2025
43AQI
24th February 2025
47AQI
25th February 2025
46AQI
26th February 2025
40AQI
27th February 2025
30AQI
28th February 2025
33AQI
1st March 2025
40AQI
2nd March 2025
34AQI
3rd March 2025
26AQI
4th March 2025
31AQI
5th March 2025
43AQI
6th March 2025
28AQI
7th March 2025
27AQI
8th March 2025
33AQI
9th March 2025
37AQI
10th March 2025
33AQI
11th March 2025
29AQI
12th March 2025
27AQI
13th March 2025
20AQI
14th March 2025
24AQI
15th March 2025
29AQI
16th March 2025
40AQI
17th March 2025
39AQI
18th March 2025
22AQI
19th March 2025
22AQI
20th March 2025
24AQI
21st March 2025
31AQI
22nd March 2025
36AQI
23rd March 2025
43AQI
24th March 2025
44AQI
25th March 2025
47AQI
26th March 2025
46AQI
27th March 2025
34AQI
28th March 2025
30AQI
29th March 2025
34AQI
30th March 2025
36AQI
31st March 2025
25AQI
1st April 2025
24AQI
2nd April 2025
30AQI
3rd April 2025
27AQI
4th April 2025
26AQI
5th April 2025
25AQI
6th April 2025
25AQI
7th April 2025
30AQI
8th April 2025
42AQI
9th April 2025
46AQI
10th April 2025
50AQI
11th April 2025
51AQI
12th April 2025
50AQI
13th April 2025
54AQI
14th April 2025
52AQI
15th April 2025
53AQI
16th April 2025
39AQI
17th April 2025
31AQI
18th April 2025
30AQI
19th April 2025
33AQI
20th April 2025
38AQI
21st April 2025
43AQI
22nd April 2025
53AQI
23rd April 2025
47AQI
24th April 2025
41AQI
25th April 2025
39AQI
26th April 2025
25AQI
27th April 2025
20AQI
28th April 2025
24AQI
29th April 2025
36AQI
30th April 2025
44AQI
1st May 2025
48AQI
2nd May 2025
47AQI
3rd May 2025
46AQI
4th May 2025
24AQI
5th May 2025
30AQI
6th May 2025
37AQI
7th May 2025
35AQI
8th May 2025
46AQI
9th May 2025
43AQI
10th May 2025
41AQI
11th May 2025
38AQI
12th May 2025
47AQI
13th May 2025
27AQI
14th May 2025
31AQI
15th May 2025
44AQI
16th May 2025
50AQI
17th May 2025
43AQI
18th May 2025
40AQI
19th May 2025
40AQI
20th May 2025
48AQI
21st May 2025
50AQI
22nd May 2025
55AQI
23rd May 2025
56AQI
24th May 2025
53AQI
25th May 2025
51AQI
26th May 2025
51AQI
27th May 2025
52AQI
28th May 2025
50AQI
29th May 2025
49AQI
30th May 2025
50AQI
31st May 2025
51AQI
1st June 2025
46AQI
2nd June 2025
36AQI
3rd June 2025
39AQI
4th June 2025
44AQI
5th June 2025
46AQI
6th June 2025
45AQI
7th June 2025
50AQI
8th June 2025
49AQI
9th June 2025
49AQI
10th June 2025
53AQI
11th June 2025
54AQI
12th June 2025
54AQI
13th June 2025
54AQI
14th June 2025
54AQI
15th June 2025
53AQI
16th June 2025
56AQI
17th June 2025
58AQI
18th June 2025
57AQI
19th June 2025
57AQI
20th June 2025
56AQI
21st June 2025
53AQI
22nd June 2025
53AQI
23rd June 2025
52AQI
24th June 2025
53AQI
25th June 2025
51AQI
26th June 2025
53AQI
27th June 2025
54AQI
28th June 2025
49AQI
29th June 2025
46AQI
30th June 2025
41AQI
1st July 2025
51AQI
2nd July 2025
51AQI
3rd July 2025
48AQI
4th July 2025
48AQI
5th July 2025
82AQI
6th July 2025
56AQI
7th July 2025
52AQI
8th July 2025
54AQI
9th July 2025
49AQI
10th July 2025
47AQI
11th July 2025
53AQI
12th July 2025
55AQI
13th July 2025
52AQI
14th July 2025
48AQI
15th July 2025
45AQI
16th July 2025
44AQI
17th July 2025
34AQI
18th July 2025
38AQI
19th July 2025
39AQI
20th July 2025
43AQI
21st July 2025
44AQI
22nd July 2025
35AQI
23rd July 2025
32AQI
24th July 2025
32AQI
25th July 2025
27AQI
26th July 2025
27AQI
27th July 2025
31AQI
28th July 2025
33AQI
29th July 2025
37AQI
30th July 2025
42AQI
31st July 2025
51AQI
1st August 2025
52AQI
2nd August 2025
53AQI
3rd August 2025
55AQI
4th August 2025
61AQI
5th August 2025
64AQI
6th August 2025
66AQI
7th August 2025
60AQI
8th August 2025
56AQI
9th August 2025
58AQI
10th August 2025
58AQI
11th August 2025
59AQI
12th August 2025
57AQI
13th August 2025
59AQI
14th August 2025
60AQI
15th August 2025
54AQI
16th August 2025
44AQI
17th August 2025
43AQI
18th August 2025
42AQI
19th August 2025
41AQI
20th August 2025
41AQI
21st August 2025
53AQI
22nd August 2025
95AQI
23rd August 2025
51AQI
24th August 2025
55AQI
25th August 2025
52AQI
26th August 2025
48AQI
27th August 2025
42AQI
28th August 2025
41AQI
29th August 2025
39AQI
30th August 2025
45AQI
31st August 2025
47AQI
1st September 2025
45AQI
2nd September 2025
42AQI
3rd September 2025
49AQI
4th September 2025
50AQI
5th September 2025
41AQI
6th September 2025
41AQI
7th September 2025
39AQI
8th September 2025
28AQI
9th September 2025
29AQI
10th September 2025
30AQI
11th September 2025
31AQI
12th September 2025
34AQI
13th September 2025
47AQI
14th September 2025
54AQI
15th September 2025
51AQI
16th September 2025
51AQI
17th September 2025
40AQI
18th September 2025
35AQI
19th September 2025
34AQI
20th September 2025
29AQI
21st September 2025
33AQI
22nd September 2025
35AQI
23rd September 2025
39AQI
24th September 2025
43AQI
25th September 2025
49AQI
26th September 2025
37AQI
27th September 2025
31AQI
28th September 2025
40AQI
29th September 2025
55AQI
30th September 2025
55AQI
1st October 2025
56AQI
2nd October 2025
44AQI
3rd October 2025
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

48AQI

39AQI

33AQI

38AQI

44AQI

51AQI

45AQI

53AQI

41AQI

50AQI

No. of days

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

202544AQI

19
12
25
3
31
25
5
24
7
12
18
21
10
11
20
25
5
1
1
194
81

Highest AQI recorded in

August

53AQI

Lowest AQI recorded in

March

33AQI

202450AQI

13
3
1
1
12
23
6
21
10
24
7
3
21
3
1
14
15
2
27
3
13
18
152
83
5
1

Highest AQI recorded in

September

75AQI

Lowest AQI recorded in

April

21AQI

202336AQI

28
2
26
2
28
3
1
3
25
6
110
14

Highest AQI recorded in

April

54AQI

Lowest AQI recorded in

November

26AQI

202242AQI

25
5
20
2
31
21
9
14
17
16
14
18
6
1
1
19
10
16
14
1
28
2
24
7
233
87
1

Highest AQI recorded in

October

53AQI

Lowest AQI recorded in

February

30AQI

202145AQI

26
4
23
5
30
1
23
7
18
12
21
9
13
17
1
13
18
11
19
26
5
13
14
3
18
10
3
235
121
7

Highest AQI recorded in

November

61AQI

Lowest AQI recorded in

March

28AQI

202045AQI

12
20
9
14
13
9
17
14
5
20
4
1
8
22
1
20
10
26
5
144
80
5
1

Highest AQI recorded in

September

72AQI

Lowest AQI recorded in

May

17AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2024(Avg.)
50AQI
Least Polluted Year Recorded
2023(Avg.)
36AQI

Upland's annual 2025 AQI (44) shows an average percentage change of 0.5% (worsened AQI) compared to previous years: 2020 (45), 2021 (45), 2022 (42), 2023 (36), 2024 (50).