El Cajon, 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+
September Air Quality Analysis
El Cajon, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
18th Sep 2022
273AQILowest AQI recorded on
12th Sep 2022
20AQISame Day Analysis (13th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 41 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 13th Sep - 14th Sep 2025
El Cajon, California, United States
AQI
Day
Night
.
6 AM13th Sep 2025
7 PM
5 AM14th Sep 2025
Day time
Avg. Highest Time
5PM13th Sep
48AQI
Avg. Lowest Time
6AM13th Sep
40AQI
Night time
Avg. Highest Time
11PM13th Sep
47AQI
Avg. Lowest Time
7PM13th Sep
41AQI
In the last 24 hours,
El Cajon's AQI reached its highest point of 48 at 5 PM during the Day, while the lowest point, 40, was recorded at 6 AM during the Day between 13th Sep and 14th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
El Cajon, California, United States
AugSep
15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th
Day
Night
15th Aug 2025586 AMAQI
15th Aug 2025587 AMAQI
15th Aug 2025598 AMAQI
15th Aug 2025599 AMAQI
15th Aug 20256210 AMAQI
15th Aug 20256511 AMAQI
15th Aug 20256612 PMAQI
15th Aug 2025651 PMAQI
15th Aug 2025632 PMAQI
15th Aug 2025583 PMAQI
15th Aug 2025534 PMAQI
15th Aug 2025465 PMAQI
15th Aug 2025376 PMAQI
15th Aug 2025567 PMAQI
15th Aug 2025438 PMAQI
15th Aug 2025309 PMAQI
15th Aug 20252810 PMAQI
15th Aug 20253011 PMAQI
16th Aug 20253212 AMAQI
16th Aug 2025331 AMAQI
16th Aug 2025362 AMAQI
16th Aug 2025343 AMAQI
16th Aug 2025374 AMAQI
16th Aug 2025405 AMAQI
20°C17/26°C
16th Aug 2025406 AMAQI
16th Aug 2025427 AMAQI
16th Aug 2025438 AMAQI
16th Aug 2025469 AMAQI
16th Aug 20254410 AMAQI
16th Aug 20254811 AMAQI
16th Aug 20254612 PMAQI
16th Aug 2025461 PMAQI
16th Aug 2025422 PMAQI
16th Aug 2025443 PMAQI
16th Aug 2025444 PMAQI
16th Aug 2025415 PMAQI
16th Aug 2025376 PMAQI
16th Aug 2025387 PMAQI
16th Aug 2025368 PMAQI
16th Aug 2025299 PMAQI
16th Aug 20252810 PMAQI
16th Aug 20252811 PMAQI
17th Aug 20252612 AMAQI
17th Aug 2025271 AMAQI
17th Aug 2025242 AMAQI
17th Aug 2025283 AMAQI
17th Aug 2025284 AMAQI
17th Aug 2025295 AMAQI
21°C16/28°C
17th Aug 2025276 AMAQI
17th Aug 2025307 AMAQI
17th Aug 2025348 AMAQI
17th Aug 2025389 AMAQI
17th Aug 20253710 AMAQI
17th Aug 20254211 AMAQI
17th Aug 20254412 PMAQI
17th Aug 2025521 PMAQI
17th Aug 2025512 PMAQI
17th Aug 2025533 PMAQI
17th Aug 2025534 PMAQI
17th Aug 2025535 PMAQI
17th Aug 2025496 PMAQI
17th Aug 2025327 PMAQI
17th Aug 2025358 PMAQI
17th Aug 2025389 PMAQI
17th Aug 20253710 PMAQI
17th Aug 20253511 PMAQI
18th Aug 20253512 AMAQI
18th Aug 2025341 AMAQI
18th Aug 2025352 AMAQI
18th Aug 2025383 AMAQI
18th Aug 2025384 AMAQI
18th Aug 2025375 AMAQI
22°C16/30°C
18th Aug 2025426 AMAQI
18th Aug 2025427 AMAQI
18th Aug 2025468 AMAQI
18th Aug 2025489 AMAQI
18th Aug 20255010 AMAQI
18th Aug 20255211 AMAQI
18th Aug 20255312 PMAQI
18th Aug 2025551 PMAQI
18th Aug 2025562 PMAQI
18th Aug 2025553 PMAQI
18th Aug 2025534 PMAQI
18th Aug 2025535 PMAQI
18th Aug 2025516 PMAQI
18th Aug 2025427 PMAQI
18th Aug 2025448 PMAQI
18th Aug 2025429 PMAQI
18th Aug 20254110 PMAQI
18th Aug 20254211 PMAQI
19th Aug 20254012 AMAQI
19th Aug 2025401 AMAQI
19th Aug 2025422 AMAQI
19th Aug 2025443 AMAQI
19th Aug 2025464 AMAQI
19th Aug 2025465 AMAQI
23°C17/31°C
19th Aug 2025446 AMAQI
19th Aug 2025457 AMAQI
19th Aug 2025448 AMAQI
19th Aug 2025479 AMAQI
19th Aug 20254710 AMAQI
19th Aug 20254911 AMAQI
19th Aug 20255212 PMAQI
19th Aug 2025501 PMAQI
19th Aug 2025512 PMAQI
19th Aug 2025483 PMAQI
19th Aug 2025434 PMAQI
19th Aug 2025405 PMAQI
19th Aug 2025366 PMAQI
19th Aug 2025467 PMAQI
19th Aug 2025378 PMAQI
19th Aug 2025319 PMAQI
19th Aug 20253410 PMAQI
19th Aug 20253511 PMAQI
20th Aug 20253712 AMAQI
20th Aug 2025401 AMAQI
20th Aug 2025422 AMAQI
20th Aug 2025433 AMAQI
20th Aug 2025444 AMAQI
20th Aug 2025465 AMAQI
24°C17/34°C
20th Aug 2025486 AMAQI
20th Aug 2025467 AMAQI
20th Aug 2025448 AMAQI
20th Aug 2025449 AMAQI
20th Aug 20254610 AMAQI
20th Aug 20254611 AMAQI
20th Aug 20254812 PMAQI
20th Aug 2025471 PMAQI
20th Aug 2025462 PMAQI
20th Aug 2025443 PMAQI
20th Aug 2025464 PMAQI
20th Aug 2025455 PMAQI
20th Aug 2025416 PMAQI
20th Aug 2025437 PMAQI
20th Aug 2025408 PMAQI
20th Aug 2025389 PMAQI
20th Aug 20253810 PMAQI
20th Aug 20254311 PMAQI
21st Aug 20254712 AMAQI
21st Aug 2025501 AMAQI
21st Aug 2025502 AMAQI
21st Aug 2025503 AMAQI
21st Aug 2025514 AMAQI
21st Aug 2025515 AMAQI
26°C19/35°C
21st Aug 2025506 AMAQI
21st Aug 2025507 AMAQI
21st Aug 2025508 AMAQI
21st Aug 2025509 AMAQI
21st Aug 20255110 AMAQI
21st Aug 20255111 AMAQI
21st Aug 20255212 PMAQI
21st Aug 2025541 PMAQI
21st Aug 2025502 PMAQI
21st Aug 2025523 PMAQI
21st Aug 2025544 PMAQI
21st Aug 2025545 PMAQI
21st Aug 2025536 PMAQI
21st Aug 2025487 PMAQI
21st Aug 2025508 PMAQI
21st Aug 2025519 PMAQI
21st Aug 20255010 PMAQI
21st Aug 20255411 PMAQI
22nd Aug 20255412 AMAQI
22nd Aug 2025551 AMAQI
22nd Aug 2025562 AMAQI
22nd Aug 2025553 AMAQI
22nd Aug 2025564 AMAQI
22nd Aug 2025575 AMAQI
28°C21/37°C
22nd Aug 2025576 AMAQI
22nd Aug 2025567 AMAQI
22nd Aug 2025568 AMAQI
22nd Aug 2025569 AMAQI
22nd Aug 20255610 AMAQI
22nd Aug 20255711 AMAQI
22nd Aug 20255812 PMAQI
22nd Aug 2025581 PMAQI
22nd Aug 2025602 PMAQI
22nd Aug 2025603 PMAQI
22nd Aug 2025604 PMAQI
22nd Aug 2025615 PMAQI
22nd Aug 2025596 PMAQI
22nd Aug 2025587 PMAQI
22nd Aug 2025568 PMAQI
22nd Aug 2025559 PMAQI
22nd Aug 20255510 PMAQI
22nd Aug 20255611 PMAQI
23rd Aug 20255412 AMAQI
23rd Aug 2025551 AMAQI
23rd Aug 2025532 AMAQI
23rd Aug 2025533 AMAQI
23rd Aug 2025534 AMAQI
23rd Aug 2025525 AMAQI
28°C22/37°C
23rd Aug 2025536 AMAQI
23rd Aug 2025527 AMAQI
23rd Aug 2025538 AMAQI
23rd Aug 2025549 AMAQI
23rd Aug 20255410 AMAQI
23rd Aug 20255611 AMAQI
23rd Aug 20255912 PMAQI
23rd Aug 2025641 PMAQI
23rd Aug 2025672 PMAQI
23rd Aug 2025673 PMAQI
23rd Aug 2025634 PMAQI
23rd Aug 2025615 PMAQI
23rd Aug 2025596 PMAQI
23rd Aug 2025557 PMAQI
23rd Aug 2025568 PMAQI
23rd Aug 2025569 PMAQI
23rd Aug 20255410 PMAQI
23rd Aug 20255311 PMAQI
24th Aug 20255212 AMAQI
24th Aug 2025521 AMAQI
24th Aug 2025512 AMAQI
24th Aug 2025543 AMAQI
24th Aug 2025544 AMAQI
24th Aug 2025545 AMAQI
26°C20/34°C
24th Aug 2025546 AMAQI
24th Aug 2025557 AMAQI
24th Aug 2025548 AMAQI
24th Aug 2025549 AMAQI
24th Aug 20255510 AMAQI
24th Aug 20255611 AMAQI
24th Aug 20255712 PMAQI
24th Aug 2025581 PMAQI
24th Aug 2025572 PMAQI
24th Aug 2025573 PMAQI
24th Aug 2025564 PMAQI
24th Aug 2025545 PMAQI
24th Aug 2025556 PMAQI
24th Aug 2025537 PMAQI
24th Aug 2025528 PMAQI
24th Aug 2025519 PMAQI
24th Aug 20255210 PMAQI
24th Aug 20254911 PMAQI
25th Aug 20255012 AMAQI
25th Aug 2025491 AMAQI
25th Aug 2025492 AMAQI
25th Aug 2025503 AMAQI
25th Aug 2025494 AMAQI
25th Aug 2025495 AMAQI
27°C21/35°C
25th Aug 2025486 AMAQI
25th Aug 2025477 AMAQI
25th Aug 2025498 AMAQI
25th Aug 2025509 AMAQI
25th Aug 20255210 AMAQI
25th Aug 20255411 AMAQI
25th Aug 20255612 PMAQI
25th Aug 2025561 PMAQI
25th Aug 2025572 PMAQI
25th Aug 2025573 PMAQI
25th Aug 2025564 PMAQI
25th Aug 2025565 PMAQI
25th Aug 2025546 PMAQI
25th Aug 2025507 PMAQI
25th Aug 2025518 PMAQI
25th Aug 2025539 PMAQI
25th Aug 20255210 PMAQI
25th Aug 20255111 PMAQI
26th Aug 20254612 AMAQI
26th Aug 2025481 AMAQI
26th Aug 2025462 AMAQI
26th Aug 2025453 AMAQI
26th Aug 2025444 AMAQI
26th Aug 2025455 AMAQI
24°C19/33°C
26th Aug 2025486 AMAQI
26th Aug 2025487 AMAQI
26th Aug 2025488 AMAQI
26th Aug 2025479 AMAQI
26th Aug 20254810 AMAQI
26th Aug 20255111 AMAQI
26th Aug 20255312 PMAQI
26th Aug 2025571 PMAQI
26th Aug 2025562 PMAQI
26th Aug 2025563 PMAQI
26th Aug 2025564 PMAQI
26th Aug 2025545 PMAQI
26th Aug 2025566 PMAQI
26th Aug 2025497 PMAQI
26th Aug 2025518 PMAQI
26th Aug 2025519 PMAQI
26th Aug 20255210 PMAQI
26th Aug 20255111 PMAQI
27th Aug 20254712 AMAQI
27th Aug 2025491 AMAQI
27th Aug 2025462 AMAQI
27th Aug 2025463 AMAQI
27th Aug 2025464 AMAQI
27th Aug 2025465 AMAQI
23°C18/32°C
27th Aug 2025456 AMAQI
27th Aug 2025487 AMAQI
27th Aug 2025468 AMAQI
27th Aug 2025489 AMAQI
27th Aug 20255210 AMAQI
27th Aug 20255311 AMAQI
27th Aug 20255512 PMAQI
27th Aug 2025551 PMAQI
27th Aug 2025542 PMAQI
27th Aug 2025533 PMAQI
27th Aug 2025524 PMAQI
27th Aug 2025485 PMAQI
27th Aug 2025486 PMAQI
27th Aug 2025497 PMAQI
27th Aug 2025498 PMAQI
27th Aug 2025519 PMAQI
27th Aug 20255110 PMAQI
27th Aug 20255111 PMAQI
28th Aug 20255012 AMAQI
28th Aug 2025511 AMAQI
28th Aug 2025522 AMAQI
28th Aug 2025533 AMAQI
28th Aug 2025544 AMAQI
28th Aug 2025545 AMAQI
25°C20/35°C
28th Aug 2025546 AMAQI
28th Aug 2025547 AMAQI
28th Aug 2025548 AMAQI
28th Aug 2025549 AMAQI
28th Aug 20255410 AMAQI
28th Aug 20255511 AMAQI
28th Aug 20255512 PMAQI
28th Aug 2025551 PMAQI
28th Aug 2025542 PMAQI
28th Aug 2025563 PMAQI
28th Aug 2025584 PMAQI
28th Aug 2025605 PMAQI
28th Aug 2025596 PMAQI
28th Aug 2025547 PMAQI
28th Aug 2025538 PMAQI
28th Aug 2025549 PMAQI
28th Aug 20255410 PMAQI
28th Aug 20255211 PMAQI
29th Aug 20255212 AMAQI
29th Aug 2025511 AMAQI
29th Aug 2025482 AMAQI
29th Aug 2025463 AMAQI
29th Aug 2025464 AMAQI
29th Aug 2025445 AMAQI
23°C21/25°C
29th Aug 2025446 AMAQI
29th Aug 2025447 AMAQI
29th Aug 2025428 AMAQI
29th Aug 2025429 AMAQI
29th Aug 20254810 AMAQI
29th Aug 20255011 AMAQI
29th Aug 20254812 PMAQI
29th Aug 2025461 PMAQI
29th Aug 2025412 PMAQI
29th Aug 2025363 PMAQI
29th Aug 2025384 PMAQI
29th Aug 2025405 PMAQI
29th Aug 2025406 PMAQI
29th Aug 2025447 PMAQI
29th Aug 2025398 PMAQI
29th Aug 2025319 PMAQI
29th Aug 20252810 PMAQI
29th Aug 20252711 PMAQI
30th Aug 20252812 AMAQI
30th Aug 2025281 AMAQI
30th Aug 2025322 AMAQI
30th Aug 2025363 AMAQI
30th Aug 2025384 AMAQI
30th Aug 2025375 AMAQI
27°C20/36°C
30th Aug 2025386 AMAQI
30th Aug 2025407 AMAQI
30th Aug 2025408 AMAQI
30th Aug 2025399 AMAQI
30th Aug 20254110 AMAQI
30th Aug 20254411 AMAQI
30th Aug 20254412 PMAQI
30th Aug 2025431 PMAQI
30th Aug 2025432 PMAQI
30th Aug 2025443 PMAQI
30th Aug 2025434 PMAQI
30th Aug 2025405 PMAQI
30th Aug 2025416 PMAQI
30th Aug 2025407 PMAQI
30th Aug 2025398 PMAQI
30th Aug 2025369 PMAQI
30th Aug 20253410 PMAQI
30th Aug 20253811 PMAQI
31st Aug 20253912 AMAQI
31st Aug 2025401 AMAQI
31st Aug 2025442 AMAQI
31st Aug 2025493 AMAQI
31st Aug 2025524 AMAQI
31st Aug 2025515 AMAQI
27°C21/36°C
31st Aug 2025526 AMAQI
31st Aug 2025527 AMAQI
31st Aug 2025518 AMAQI
31st Aug 2025509 AMAQI
31st Aug 20254710 AMAQI
31st Aug 20254811 AMAQI
31st Aug 20255112 PMAQI
31st Aug 2025511 PMAQI
31st Aug 2025512 PMAQI
31st Aug 2025523 PMAQI
31st Aug 2025504 PMAQI
31st Aug 2025495 PMAQI
31st Aug 2025486 PMAQI
31st Aug 2025497 PMAQI
31st Aug 2025478 PMAQI
31st Aug 2025439 PMAQI
31st Aug 20254310 PMAQI
31st Aug 20254211 PMAQI
1st Sep 20254512 AMAQI
1st Sep 2025481 AMAQI
1st Sep 2025522 AMAQI
1st Sep 2025493 AMAQI
1st Sep 2025504 AMAQI
1st Sep 2025525 AMAQI
27°C20/36°C
1st Sep 2025526 AMAQI
1st Sep 2025517 AMAQI
1st Sep 2025508 AMAQI
1st Sep 2025499 AMAQI
1st Sep 20255010 AMAQI
1st Sep 20255311 AMAQI
1st Sep 20255512 PMAQI
1st Sep 2025551 PMAQI
1st Sep 2025542 PMAQI
1st Sep 2025543 PMAQI
1st Sep 2025534 PMAQI
1st Sep 2025535 PMAQI
1st Sep 2025486 PMAQI
1st Sep 2025517 PMAQI
1st Sep 2025438 PMAQI
1st Sep 2025349 PMAQI
1st Sep 20253310 PMAQI
1st Sep 20253611 PMAQI
2nd Sep 20254212 AMAQI
2nd Sep 2025381 AMAQI
2nd Sep 2025402 AMAQI
2nd Sep 2025443 AMAQI
2nd Sep 2025464 AMAQI
2nd Sep 2025455 AMAQI
27°C20/36°C
2nd Sep 2025476 AMAQI
2nd Sep 2025497 AMAQI
2nd Sep 2025508 AMAQI
2nd Sep 2025499 AMAQI
2nd Sep 20255010 AMAQI
2nd Sep 20254811 AMAQI
2nd Sep 20255112 PMAQI
2nd Sep 2025521 PMAQI
2nd Sep 2025512 PMAQI
2nd Sep 2025513 PMAQI
2nd Sep 2025494 PMAQI
2nd Sep 2025545 PMAQI
2nd Sep 2025556 PMAQI
2nd Sep 2025467 PMAQI
2nd Sep 2025508 PMAQI
2nd Sep 2025529 PMAQI
2nd Sep 20255210 PMAQI
2nd Sep 20255011 PMAQI
3rd Sep 20255012 AMAQI
3rd Sep 2025531 AMAQI
3rd Sep 2025532 AMAQI
3rd Sep 2025523 AMAQI
3rd Sep 2025524 AMAQI
3rd Sep 2025515 AMAQI
26°C20/39°C
3rd Sep 2025526 AMAQI
3rd Sep 2025527 AMAQI
3rd Sep 2025538 AMAQI
3rd Sep 2025539 AMAQI
3rd Sep 20255310 AMAQI
3rd Sep 20255411 AMAQI
3rd Sep 20255612 PMAQI
3rd Sep 2025561 PMAQI
3rd Sep 2025562 PMAQI
3rd Sep 2025563 PMAQI
3rd Sep 2025544 PMAQI
3rd Sep 2025535 PMAQI
3rd Sep 2025526 PMAQI
3rd Sep 2025537 PMAQI
3rd Sep 2025488 PMAQI
3rd Sep 2025429 PMAQI
3rd Sep 20254110 PMAQI
3rd Sep 20254511 PMAQI
4th Sep 20254812 AMAQI
4th Sep 2025491 AMAQI
4th Sep 2025522 AMAQI
4th Sep 2025443 AMAQI
4th Sep 2025444 AMAQI
4th Sep 2025445 AMAQI
28°C22/36°C
4th Sep 2025446 AMAQI
4th Sep 2025447 AMAQI
4th Sep 2025428 AMAQI
4th Sep 2025439 AMAQI
4th Sep 20254410 AMAQI
4th Sep 20255011 AMAQI
4th Sep 20255412 PMAQI
4th Sep 2025541 PMAQI
4th Sep 2025552 PMAQI
4th Sep 2025553 PMAQI
4th Sep 2025554 PMAQI
4th Sep 2025545 PMAQI
4th Sep 2025526 PMAQI
4th Sep 2025527 PMAQI
4th Sep 2025478 PMAQI
4th Sep 2025469 PMAQI
4th Sep 20254510 PMAQI
4th Sep 20254611 PMAQI
5th Sep 20254212 AMAQI
5th Sep 2025421 AMAQI
5th Sep 2025452 AMAQI
5th Sep 2025423 AMAQI
5th Sep 2025424 AMAQI
5th Sep 2025445 AMAQI
26°C20/35°C
5th Sep 2025486 AMAQI
5th Sep 2025487 AMAQI
5th Sep 2025488 AMAQI
5th Sep 2025499 AMAQI
5th Sep 20255210 AMAQI
5th Sep 20255311 AMAQI
5th Sep 20255612 PMAQI
5th Sep 2025571 PMAQI
5th Sep 2025582 PMAQI
5th Sep 2025583 PMAQI
5th Sep 2025564 PMAQI
5th Sep 2025545 PMAQI
5th Sep 2025496 PMAQI
5th Sep 2025467 PMAQI
5th Sep 2025378 PMAQI
5th Sep 2025389 PMAQI
5th Sep 20253610 PMAQI
5th Sep 20253711 PMAQI
6th Sep 20253712 AMAQI
6th Sep 2025361 AMAQI
6th Sep 2025382 AMAQI
6th Sep 2025403 AMAQI
6th Sep 2025404 AMAQI
6th Sep 2025425 AMAQI
24°C20/32°C
6th Sep 2025426 AMAQI
6th Sep 2025447 AMAQI
6th Sep 2025498 AMAQI
6th Sep 2025509 AMAQI
6th Sep 20255210 AMAQI
6th Sep 20255311 AMAQI
6th Sep 20255612 PMAQI
6th Sep 2025551 PMAQI
6th Sep 2025532 PMAQI
6th Sep 2025533 PMAQI
6th Sep 2025544 PMAQI
6th Sep 2025495 PMAQI
6th Sep 2025446 PMAQI
6th Sep 2025427 PMAQI
6th Sep 2025398 PMAQI
6th Sep 2025369 PMAQI
6th Sep 20253610 PMAQI
6th Sep 20253711 PMAQI
7th Sep 20253812 AMAQI
7th Sep 2025381 AMAQI
7th Sep 2025382 AMAQI
7th Sep 2025413 AMAQI
7th Sep 2025414 AMAQI
7th Sep 2025415 AMAQI
25°C20/32°C
7th Sep 2025446 AMAQI
7th Sep 2025437 AMAQI
7th Sep 2025448 AMAQI
7th Sep 2025469 AMAQI
7th Sep 20254910 AMAQI
7th Sep 20254911 AMAQI
7th Sep 20255112 PMAQI
7th Sep 2025501 PMAQI
7th Sep 2025472 PMAQI
7th Sep 2025423 PMAQI
7th Sep 2025374 PMAQI
7th Sep 2025335 PMAQI
7th Sep 2025306 PMAQI
7th Sep 2025407 PMAQI
7th Sep 2025358 PMAQI
7th Sep 2025289 PMAQI
7th Sep 20252610 PMAQI
7th Sep 20252811 PMAQI
8th Sep 20253312 AMAQI
8th Sep 2025341 AMAQI
8th Sep 2025382 AMAQI
8th Sep 2025453 AMAQI
8th Sep 2025414 AMAQI
8th Sep 2025425 AMAQI
26°C19/35°C
8th Sep 2025406 AMAQI
8th Sep 2025397 AMAQI
8th Sep 2025428 AMAQI
8th Sep 2025429 AMAQI
8th Sep 20254610 AMAQI
8th Sep 20254311 AMAQI
8th Sep 20254212 PMAQI
8th Sep 2025431 PMAQI
8th Sep 2025382 PMAQI
8th Sep 2025353 PMAQI
8th Sep 2025344 PMAQI
8th Sep 2025265 PMAQI
8th Sep 2025256 PMAQI
8th Sep 2025367 PMAQI
8th Sep 2025288 PMAQI
8th Sep 2025199 PMAQI
8th Sep 20251810 PMAQI
8th Sep 20251811 PMAQI
9th Sep 20251812 AMAQI
9th Sep 2025191 AMAQI
9th Sep 2025192 AMAQI
9th Sep 2025223 AMAQI
9th Sep 2025224 AMAQI
9th Sep 2025235 AMAQI
25°C19/34°C
9th Sep 2025256 AMAQI
9th Sep 2025277 AMAQI
9th Sep 2025278 AMAQI
9th Sep 2025289 AMAQI
9th Sep 20252810 AMAQI
9th Sep 20253011 AMAQI
9th Sep 20252912 PMAQI
9th Sep 2025291 PMAQI
9th Sep 2025292 PMAQI
9th Sep 2025293 PMAQI
9th Sep 2025294 PMAQI
9th Sep 2025275 PMAQI
9th Sep 2025276 PMAQI
9th Sep 2025257 PMAQI
9th Sep 2025248 PMAQI
9th Sep 2025239 PMAQI
9th Sep 20252310 PMAQI
9th Sep 20252311 PMAQI
10th Sep 20252312 AMAQI
10th Sep 2025231 AMAQI
10th Sep 2025232 AMAQI
10th Sep 2025233 AMAQI
10th Sep 2025254 AMAQI
10th Sep 2025245 AMAQI
22°C18/29°C
10th Sep 2025236 AMAQI
10th Sep 2025217 AMAQI
10th Sep 2025218 AMAQI
10th Sep 2025229 AMAQI
10th Sep 20252410 AMAQI
10th Sep 20252411 AMAQI
10th Sep 20252412 PMAQI
10th Sep 2025261 PMAQI
10th Sep 2025252 PMAQI
10th Sep 2025263 PMAQI
10th Sep 2025274 PMAQI
10th Sep 2025265 PMAQI
10th Sep 2025266 PMAQI
10th Sep 2025247 PMAQI
10th Sep 2025258 PMAQI
10th Sep 2025289 PMAQI
10th Sep 20252510 PMAQI
10th Sep 20252711 PMAQI
11th Sep 20252712 AMAQI
11th Sep 2025281 AMAQI
11th Sep 2025272 AMAQI
11th Sep 2025313 AMAQI
11th Sep 2025284 AMAQI
11th Sep 2025285 AMAQI
20°C18/25°C
11th Sep 2025276 AMAQI
11th Sep 2025297 AMAQI
11th Sep 2025288 AMAQI
11th Sep 2025269 AMAQI
11th Sep 20252710 AMAQI
11th Sep 20252811 AMAQI
11th Sep 20252812 PMAQI
11th Sep 2025281 PMAQI
11th Sep 2025272 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025274 PMAQI
11th Sep 2025285 PMAQI
11th Sep 2025256 PMAQI
11th Sep 2025277 PMAQI
11th Sep 2025268 PMAQI
11th Sep 2025239 PMAQI
11th Sep 20252310 PMAQI
11th Sep 20252311 PMAQI
12th Sep 20252412 AMAQI
12th Sep 2025241 AMAQI
12th Sep 2025242 AMAQI
12th Sep 2025243 AMAQI
12th Sep 2025244 AMAQI
12th Sep 2025265 AMAQI
21°C17/28°C
12th Sep 2025266 AMAQI
12th Sep 2025267 AMAQI
12th Sep 2025288 AMAQI
12th Sep 2025299 AMAQI
12th Sep 20253010 AMAQI
12th Sep 20253311 AMAQI
12th Sep 20253212 PMAQI
12th Sep 2025321 PMAQI
12th Sep 2025332 PMAQI
12th Sep 2025313 PMAQI
12th Sep 2025324 PMAQI
12th Sep 2025345 PMAQI
12th Sep 2025346 PMAQI
12th Sep 2025277 PMAQI
12th Sep 2025328 PMAQI
12th Sep 2025369 PMAQI
12th Sep 20253510 PMAQI
12th Sep 20253411 PMAQI
13th Sep 20253312 AMAQI
13th Sep 2025361 AMAQI
13th Sep 2025362 AMAQI
13th Sep 2025403 AMAQI
13th Sep 2025394 AMAQI
13th Sep 2025415 AMAQI
20°C16/28°C
13th Sep 2025406 AMAQI
13th Sep 2025417 AMAQI
13th Sep 2025418 AMAQI
13th Sep 2025419 AMAQI
13th Sep 20254310 AMAQI
13th Sep 20254411 AMAQI
13th Sep 20254312 PMAQI
13th Sep 2025431 PMAQI
13th Sep 2025462 PMAQI
13th Sep 2025463 PMAQI
13th Sep 2025464 PMAQI
13th Sep 2025485 PMAQI
13th Sep 2025456 PMAQI
13th Sep 2025417 PMAQI
13th Sep 2025428 PMAQI
13th Sep 2025439 PMAQI
13th Sep 20254510 PMAQI
13th Sep 20254711 PMAQI
14th Sep 20254312 AMAQI
14th Sep 2025451 AMAQI
14th Sep 2025422 AMAQI
14th Sep 2025443 AMAQI
14th Sep 2025444 AMAQI
14th Sep 2025465 AMAQI
21°C17/29°C
14th Sep 2025436 AMAQI
6 AM14th Sep 2025457 AMAQI
14th Sep 2025468 AMAQI
14th Sep 2025469 AMAQI
14th Sep 20254510 AMAQI
14th Sep 20255011 AMAQI
14th Sep 20255112 PMAQI
12 PM14th Sep 2025501 PMAQI
14th Sep 2025532 PMAQI
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 4 PM
49AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
6 AM - 10 AM
45AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 4 PM (Avg. 49), while the lowest AQI was between 6 AM to 10 AM (Avg. 45).
Night time
Avg. Highest Time
12 AM - 8 PM
42AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
9 PM - 11 PM
40AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 8 PM (Avg. 42), while the lowest AQI was between 9 PM to 11 PM (Avg. 40).
2025 Days Vs Air Quality
El Cajon, California, United States
2025
75%
192
25%
64
Total number of days with different AQI categories in last 257 days in 2025 (108 days remaining)
Good
192 DaysModerate
64 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 257 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
El Cajon, 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
90AQI
90AQI
2nd January 2025
68AQI
68AQI
3rd January 2025
64AQI
64AQI
4th January 2025
62AQI
62AQI
5th January 2025
54AQI
54AQI
6th January 2025
46AQI
46AQI
7th January 2025
47AQI
47AQI
8th January 2025
49AQI
49AQI
9th January 2025
43AQI
43AQI
10th January 2025
36AQI
36AQI
11th January 2025
48AQI
48AQI
12th January 2025
50AQI
50AQI
13th January 2025
40AQI
40AQI
14th January 2025
36AQI
36AQI
15th January 2025
37AQI
37AQI
16th January 2025
42AQI
42AQI
17th January 2025
40AQI
40AQI
18th January 2025
48AQI
48AQI
19th January 2025
60AQI
60AQI
20th January 2025
55AQI
55AQI
21st January 2025
43AQI
43AQI
22nd January 2025
43AQI
43AQI
23rd January 2025
39AQI
39AQI
24th January 2025
52AQI
52AQI
25th January 2025
71AQI
71AQI
26th January 2025
31AQI
31AQI
27th January 2025
31AQI
31AQI
28th January 2025
39AQI
39AQI
29th January 2025
39AQI
39AQI
30th January 2025
45AQI
45AQI
31st January 2025
54AQI
54AQI
1st February 2025
66AQI
66AQI
2nd February 2025
58AQI
58AQI
3rd February 2025
48AQI
48AQI
4th February 2025
58AQI
58AQI
5th February 2025
35AQI
35AQI
6th February 2025
28AQI
28AQI
7th February 2025
26AQI
26AQI
8th February 2025
28AQI
28AQI
9th February 2025
42AQI
42AQI
10th February 2025
45AQI
45AQI
11th February 2025
33AQI
33AQI
12th February 2025
36AQI
36AQI
13th February 2025
25AQI
25AQI
14th February 2025
32AQI
32AQI
15th February 2025
31AQI
31AQI
16th February 2025
38AQI
38AQI
17th February 2025
44AQI
44AQI
18th February 2025
50AQI
50AQI
19th February 2025
46AQI
46AQI
20th February 2025
49AQI
49AQI
21st February 2025
45AQI
45AQI
22nd February 2025
46AQI
46AQI
23rd February 2025
42AQI
42AQI
24th February 2025
39AQI
39AQI
25th February 2025
48AQI
48AQI
26th February 2025
55AQI
55AQI
27th February 2025
49AQI
49AQI
28th February 2025
34AQI
34AQI
1st March 2025
34AQI
34AQI
2nd March 2025
37AQI
37AQI
3rd March 2025
32AQI
32AQI
4th March 2025
32AQI
32AQI
5th March 2025
40AQI
40AQI
6th March 2025
33AQI
33AQI
7th March 2025
31AQI
31AQI
8th March 2025
31AQI
31AQI
9th March 2025
37AQI
37AQI
10th March 2025
35AQI
35AQI
11th March 2025
33AQI
33AQI
12th March 2025
28AQI
28AQI
13th March 2025
22AQI
22AQI
14th March 2025
19AQI
19AQI
15th March 2025
26AQI
26AQI
16th March 2025
36AQI
36AQI
17th March 2025
50AQI
50AQI
18th March 2025
28AQI
28AQI
19th March 2025
24AQI
24AQI
20th March 2025
23AQI
23AQI
21st March 2025
33AQI
33AQI
22nd March 2025
42AQI
42AQI
23rd March 2025
56AQI
56AQI
24th March 2025
54AQI
54AQI
25th March 2025
57AQI
57AQI
26th March 2025
31AQI
31AQI
27th March 2025
20AQI
20AQI
28th March 2025
27AQI
27AQI
29th March 2025
39AQI
39AQI
30th March 2025
39AQI
39AQI
31st March 2025
22AQI
22AQI
1st April 2025
24AQI
24AQI
2nd April 2025
31AQI
31AQI
3rd April 2025
29AQI
29AQI
4th April 2025
21AQI
21AQI
5th April 2025
23AQI
23AQI
6th April 2025
25AQI
25AQI
7th April 2025
25AQI
25AQI
8th April 2025
37AQI
37AQI
9th April 2025
39AQI
39AQI
10th April 2025
40AQI
40AQI
11th April 2025
48AQI
48AQI
12th April 2025
53AQI
53AQI
13th April 2025
53AQI
53AQI
14th April 2025
53AQI
53AQI
15th April 2025
41AQI
41AQI
16th April 2025
33AQI
33AQI
17th April 2025
23AQI
23AQI
18th April 2025
23AQI
23AQI
19th April 2025
28AQI
28AQI
20th April 2025
36AQI
36AQI
21st April 2025
47AQI
47AQI
22nd April 2025
50AQI
50AQI
23rd April 2025
41AQI
41AQI
24th April 2025
38AQI
38AQI
25th April 2025
35AQI
35AQI
26th April 2025
21AQI
21AQI
27th April 2025
23AQI
23AQI
28th April 2025
21AQI
21AQI
29th April 2025
37AQI
37AQI
30th April 2025
49AQI
49AQI
1st May 2025
45AQI
45AQI
2nd May 2025
28AQI
28AQI
3rd May 2025
35AQI
35AQI
4th May 2025
27AQI
27AQI
5th May 2025
26AQI
26AQI
6th May 2025
36AQI
36AQI
7th May 2025
42AQI
42AQI
8th May 2025
45AQI
45AQI
9th May 2025
48AQI
48AQI
10th May 2025
45AQI
45AQI
11th May 2025
49AQI
49AQI
12th May 2025
52AQI
52AQI
13th May 2025
28AQI
28AQI
14th May 2025
30AQI
30AQI
15th May 2025
47AQI
47AQI
16th May 2025
52AQI
52AQI
17th May 2025
42AQI
42AQI
18th May 2025
26AQI
26AQI
19th May 2025
38AQI
38AQI
20th May 2025
46AQI
46AQI
21st May 2025
49AQI
49AQI
22nd May 2025
56AQI
56AQI
23rd May 2025
59AQI
59AQI
24th May 2025
56AQI
56AQI
25th May 2025
49AQI
49AQI
26th May 2025
47AQI
47AQI
27th May 2025
45AQI
45AQI
28th May 2025
40AQI
40AQI
29th May 2025
38AQI
38AQI
30th May 2025
45AQI
45AQI
31st May 2025
54AQI
54AQI
1st June 2025
47AQI
47AQI
2nd June 2025
41AQI
41AQI
3rd June 2025
31AQI
31AQI
4th June 2025
26AQI
26AQI
5th June 2025
26AQI
26AQI
6th June 2025
24AQI
24AQI
7th June 2025
28AQI
28AQI
8th June 2025
32AQI
32AQI
9th June 2025
42AQI
42AQI
10th June 2025
45AQI
45AQI
11th June 2025
46AQI
46AQI
12th June 2025
50AQI
50AQI
13th June 2025
58AQI
58AQI
14th June 2025
54AQI
54AQI
15th June 2025
53AQI
53AQI
16th June 2025
57AQI
57AQI
17th June 2025
60AQI
60AQI
18th June 2025
62AQI
62AQI
19th June 2025
59AQI
59AQI
20th June 2025
55AQI
55AQI
21st June 2025
61AQI
61AQI
22nd June 2025
61AQI
61AQI
23rd June 2025
57AQI
57AQI
24th June 2025
59AQI
59AQI
25th June 2025
53AQI
53AQI
26th June 2025
49AQI
49AQI
27th June 2025
49AQI
49AQI
28th June 2025
46AQI
46AQI
29th June 2025
45AQI
45AQI
30th June 2025
36AQI
36AQI
1st July 2025
38AQI
38AQI
2nd July 2025
38AQI
38AQI
3rd July 2025
38AQI
38AQI
4th July 2025
40AQI
40AQI
5th July 2025
58AQI
58AQI
6th July 2025
53AQI
53AQI
7th July 2025
55AQI
55AQI
8th July 2025
55AQI
55AQI
9th July 2025
46AQI
46AQI
10th July 2025
43AQI
43AQI
11th July 2025
55AQI
55AQI
12th July 2025
53AQI
53AQI
13th July 2025
46AQI
46AQI
14th July 2025
40AQI
40AQI
15th July 2025
35AQI
35AQI
16th July 2025
31AQI
31AQI
17th July 2025
24AQI
24AQI
18th July 2025
24AQI
24AQI
19th July 2025
35AQI
35AQI
20th July 2025
42AQI
42AQI
21st July 2025
36AQI
36AQI
22nd July 2025
25AQI
25AQI
23rd July 2025
24AQI
24AQI
24th July 2025
28AQI
28AQI
25th July 2025
23AQI
23AQI
26th July 2025
21AQI
21AQI
27th July 2025
23AQI
23AQI
28th July 2025
27AQI
27AQI
29th July 2025
34AQI
34AQI
30th July 2025
43AQI
43AQI
31st July 2025
49AQI
49AQI
1st August 2025
49AQI
49AQI
2nd August 2025
44AQI
44AQI
3rd August 2025
47AQI
47AQI
4th August 2025
60AQI
60AQI
5th August 2025
64AQI
64AQI
6th August 2025
59AQI
59AQI
7th August 2025
60AQI
60AQI
8th August 2025
57AQI
57AQI
9th August 2025
53AQI
53AQI
10th August 2025
54AQI
54AQI
11th August 2025
54AQI
54AQI
12th August 2025
56AQI
56AQI
13th August 2025
56AQI
56AQI
14th August 2025
59AQI
59AQI
15th August 2025
51AQI
51AQI
16th August 2025
38AQI
38AQI
17th August 2025
37AQI
37AQI
18th August 2025
44AQI
44AQI
19th August 2025
42AQI
42AQI
20th August 2025
43AQI
43AQI
21st August 2025
51AQI
51AQI
22nd August 2025
57AQI
57AQI
23rd August 2025
56AQI
56AQI
24th August 2025
54AQI
54AQI
25th August 2025
52AQI
52AQI
26th August 2025
50AQI
50AQI
27th August 2025
49AQI
49AQI
28th August 2025
54AQI
54AQI
29th August 2025
42AQI
42AQI
30th August 2025
38AQI
38AQI
31st August 2025
48AQI
48AQI
1st September 2025
48AQI
48AQI
2nd September 2025
48AQI
48AQI
3rd September 2025
51AQI
51AQI
4th September 2025
47AQI
47AQI
5th September 2025
46AQI
46AQI
6th September 2025
43AQI
43AQI
7th September 2025
39AQI
39AQI
8th September 2025
35AQI
35AQI
9th September 2025
25AQI
25AQI
10th September 2025
24AQI
24AQI
11th September 2025
27AQI
27AQI
12th September 2025
29AQI
29AQI
13th September 2025
41AQI
41AQI
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
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
42AQI
34AQI
35AQI
43AQI
47AQI
38AQI
51AQI
39AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202542AQI
21
10
24
4
28
3
27
3
25
6
17
13
25
6
13
18
12
1
192
64
Highest AQI recorded in
August51AQI
Lowest AQI recorded in
March34AQI
202441AQI
27
4
28
1
31
28
2
25
6
24
5
29
2
25
6
20
10
19
12
28
2
14
17
298
67
Highest AQI recorded in
December53AQI
Lowest AQI recorded in
March31AQI
202348AQI
22
3
1
5
23
2
3
28
1
2
16
14
28
3
30
20
11
27
4
23
7
27
4
25
4
21
10
290
62
2
10
Highest AQI recorded in
January82AQI
Lowest AQI recorded in
May37AQI
202278AQI
20
10
20
2
28
3
16
7
1
6
13
11
2
5
3
10
1
2
14
17
5
1
1
2
17
5
1
1
5
19
5
2
5
24
6
16
8
1
1
5
195
72
8
5
41
Highest AQI recorded in
June169AQI
Lowest AQI recorded in
March40AQI
202144AQI
16
12
21
7
30
1
23
7
29
2
30
28
3
18
13
24
6
27
4
19
11
15
16
280
82
Highest AQI recorded in
December51AQI
Lowest AQI recorded in
March35AQI
202047AQI
13
20
18
27
3
17
14
19
12
6
20
4
8
22
1
11
19
14
17
153
107
5
Highest AQI recorded in
September63AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2022(Avg.)
78AQILeast Polluted Year Recorded
2024(Avg.)
41AQIEl Cajon's annual 2025 AQI (42) shows an average percentage change of -14.3% (improved AQI) compared to previous years: 2020 (47), 2021 (44), 2022 (78), 2023 (48), 2024 (41).
