Signal Hill, 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+
August Air Quality Analysis
Signal Hill, California, United States
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2025
62AQILowest AQI recorded on
16th Aug 2025
34AQISame Day Analysis (16th August):
On this day, AQI across the 3 years varied significantly: 2026 ranks 2nd highest AQI at 44 of Good air quality, showing improvement over 2024 on the same day.
Day & Night AQI Trend: 15th Aug - 16th Aug 2026
Signal Hill, California, United States
AQI
Day
Night
.
6 AM15th Aug 2026
7 PM
5 AM16th Aug 2026
Day time
Avg. Highest Time
7PM15th Aug
54AQI
Avg. Lowest Time
8AM15th Aug
22AQI
Night time
Avg. Highest Time
9PM15th Aug
58AQI
Avg. Lowest Time
3AM16th Aug
34AQI
In the last 24 hours,
Signal Hill's AQI reached its highest point of 58 at 9 PM during the Night, while the lowest point, 22, was recorded at 8 AM during the Day between 15th Aug and 16th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Signal Hill, California, United States
JulAug
18th - 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 - 15th15th - 16th16th
Day
Night
18th Jul 2026346 AMAQI
18th Jul 2026467 AMAQI
18th Jul 2026488 AMAQI
18th Jul 2026539 AMAQI
18th Jul 20264510 AMAQI
18th Jul 20264911 AMAQI
18th Jul 20265212 PMAQI
18th Jul 2026541 PMAQI
18th Jul 2026562 PMAQI
18th Jul 2026523 PMAQI
18th Jul 2026554 PMAQI
18th Jul 2026555 PMAQI
18th Jul 2026566 PMAQI
18th Jul 2026547 PMAQI
18th Jul 2026518 PMAQI
18th Jul 2026509 PMAQI
18th Jul 20264610 PMAQI
18th Jul 20264711 PMAQI
19th Jul 20265212 AMAQI
19th Jul 2026541 AMAQI
19th Jul 2026502 AMAQI
19th Jul 2026523 AMAQI
19th Jul 2026484 AMAQI
19th Jul 2026505 AMAQI
25°C21/32°C
19th Jul 2026436 AMAQI
19th Jul 2026407 AMAQI
19th Jul 2026418 AMAQI
19th Jul 2026459 AMAQI
19th Jul 20264510 AMAQI
19th Jul 20264611 AMAQI
19th Jul 20265012 PMAQI
19th Jul 2026541 PMAQI
19th Jul 2026522 PMAQI
19th Jul 2026513 PMAQI
19th Jul 2026524 PMAQI
19th Jul 2026505 PMAQI
19th Jul 2026476 PMAQI
19th Jul 2026507 PMAQI
19th Jul 2026488 PMAQI
19th Jul 2026509 PMAQI
19th Jul 20264410 PMAQI
19th Jul 20264511 PMAQI
20th Jul 20264812 AMAQI
20th Jul 2026411 AMAQI
20th Jul 2026412 AMAQI
20th Jul 2026523 AMAQI
20th Jul 2026434 AMAQI
20th Jul 2026525 AMAQI
25°C21/33°C
20th Jul 2026526 AMAQI
20th Jul 2026537 AMAQI
20th Jul 2026458 AMAQI
20th Jul 2026469 AMAQI
20th Jul 20264510 AMAQI
20th Jul 20264411 AMAQI
20th Jul 20264912 PMAQI
20th Jul 2026521 PMAQI
20th Jul 2026582 PMAQI
20th Jul 2026663 PMAQI
20th Jul 2026644 PMAQI
20th Jul 2026695 PMAQI
20th Jul 2026606 PMAQI
20th Jul 2026507 PMAQI
20th Jul 2026379 PMAQI
20th Jul 20264210 PMAQI
20th Jul 20264211 PMAQI
21st Jul 20264512 AMAQI
21st Jul 2026421 AMAQI
21st Jul 2026442 AMAQI
21st Jul 2026403 AMAQI
21st Jul 2026504 AMAQI
21st Jul 2026505 AMAQI
25°C19/34°C
21st Jul 2026466 AMAQI
21st Jul 2026237 AMAQI
21st Jul 2026438 AMAQI
21st Jul 2026449 AMAQI
21st Jul 20264110 AMAQI
21st Jul 20264511 AMAQI
21st Jul 20265012 PMAQI
21st Jul 2026501 PMAQI
21st Jul 2026522 PMAQI
21st Jul 2026523 PMAQI
21st Jul 2026474 PMAQI
21st Jul 2026475 PMAQI
21st Jul 2026426 PMAQI
21st Jul 2026547 PMAQI
21st Jul 2026528 PMAQI
21st Jul 2026519 PMAQI
21st Jul 20265010 PMAQI
21st Jul 20264611 PMAQI
22nd Jul 20264612 AMAQI
22nd Jul 2026381 AMAQI
22nd Jul 2026462 AMAQI
22nd Jul 2026443 AMAQI
22nd Jul 2026464 AMAQI
22nd Jul 2026505 AMAQI
25°C20/33°C
22nd Jul 2026476 AMAQI
22nd Jul 2026437 AMAQI
22nd Jul 2026508 AMAQI
22nd Jul 2026509 AMAQI
22nd Jul 20264610 AMAQI
22nd Jul 20264011 AMAQI
22nd Jul 20264012 PMAQI
22nd Jul 2026421 PMAQI
22nd Jul 2026422 PMAQI
22nd Jul 2026413 PMAQI
22nd Jul 2026604 PMAQI
22nd Jul 2026425 PMAQI
22nd Jul 2026366 PMAQI
22nd Jul 2026467 PMAQI
22nd Jul 2026468 PMAQI
22nd Jul 2026449 PMAQI
22nd Jul 20264210 PMAQI
22nd Jul 20264611 PMAQI
23rd Jul 20264612 AMAQI
23rd Jul 2026371 AMAQI
23rd Jul 2026482 AMAQI
23rd Jul 2026463 AMAQI
23rd Jul 2026464 AMAQI
23rd Jul 2026505 AMAQI
25°C21/33°C
23rd Jul 2026466 AMAQI
23rd Jul 2026467 AMAQI
23rd Jul 2026468 AMAQI
23rd Jul 2026479 AMAQI
23rd Jul 20264610 AMAQI
23rd Jul 20264911 AMAQI
23rd Jul 20265112 PMAQI
23rd Jul 2026501 PMAQI
23rd Jul 2026552 PMAQI
23rd Jul 2026563 PMAQI
23rd Jul 2026544 PMAQI
23rd Jul 2026485 PMAQI
23rd Jul 2026506 PMAQI
23rd Jul 2026497 PMAQI
23rd Jul 2026498 PMAQI
23rd Jul 2026449 PMAQI
23rd Jul 20264310 PMAQI
23rd Jul 20264411 PMAQI
24th Jul 20264312 AMAQI
24th Jul 2026481 AMAQI
24th Jul 2026522 AMAQI
24th Jul 2026503 AMAQI
24th Jul 2026474 AMAQI
24th Jul 2026455 AMAQI
26°C19/36°C
24th Jul 2026466 AMAQI
24th Jul 2026447 AMAQI
24th Jul 2026488 AMAQI
24th Jul 2026459 AMAQI
24th Jul 20265010 AMAQI
24th Jul 20265011 AMAQI
24th Jul 20265312 PMAQI
24th Jul 2026521 PMAQI
24th Jul 2026522 PMAQI
24th Jul 2026523 PMAQI
24th Jul 2026534 PMAQI
24th Jul 2026605 PMAQI
24th Jul 2026566 PMAQI
24th Jul 2026537 PMAQI
24th Jul 2026488 PMAQI
24th Jul 2026509 PMAQI
24th Jul 20265210 PMAQI
24th Jul 20265011 PMAQI
25th Jul 20265212 AMAQI
25th Jul 2026541 AMAQI
25th Jul 2026522 AMAQI
25th Jul 2026433 AMAQI
25th Jul 2026344 AMAQI
25th Jul 2026285 AMAQI
25°C20/32°C
25th Jul 2026416 AMAQI
25th Jul 2026247 AMAQI
25th Jul 2026398 AMAQI
25th Jul 2026449 AMAQI
25th Jul 20264510 AMAQI
25th Jul 20264511 AMAQI
25th Jul 20265212 PMAQI
25th Jul 2026531 PMAQI
25th Jul 2026582 PMAQI
25th Jul 2026523 PMAQI
25th Jul 2026514 PMAQI
25th Jul 2026575 PMAQI
25th Jul 2026476 PMAQI
25th Jul 2026487 PMAQI
25th Jul 2026508 PMAQI
25th Jul 2026529 PMAQI
25th Jul 20264410 PMAQI
25th Jul 20264011 PMAQI
26th Jul 20264812 AMAQI
26th Jul 2026481 AMAQI
26th Jul 2026482 AMAQI
26th Jul 2026453 AMAQI
26th Jul 2026454 AMAQI
26th Jul 2026525 AMAQI
24°C19/32°C
26th Jul 2026456 AMAQI
26th Jul 2026507 AMAQI
26th Jul 2026478 AMAQI
26th Jul 2026509 AMAQI
26th Jul 20265210 AMAQI
26th Jul 20265611 AMAQI
26th Jul 20265612 PMAQI
26th Jul 2026601 PMAQI
26th Jul 2026592 PMAQI
26th Jul 2026623 PMAQI
26th Jul 2026604 PMAQI
26th Jul 2026605 PMAQI
26th Jul 2026606 PMAQI
26th Jul 2026577 PMAQI
26th Jul 2026568 PMAQI
26th Jul 2026509 PMAQI
26th Jul 20264210 PMAQI
26th Jul 20264311 PMAQI
27th Jul 20264612 AMAQI
27th Jul 2026471 AMAQI
27th Jul 2026422 AMAQI
27th Jul 2026453 AMAQI
27th Jul 2026444 AMAQI
27th Jul 2026325 AMAQI
26°C19/37°C
27th Jul 2026486 AMAQI
27th Jul 2026417 AMAQI
27th Jul 2026468 AMAQI
27th Jul 2026509 AMAQI
27th Jul 20265110 AMAQI
27th Jul 20265011 AMAQI
27th Jul 20265012 PMAQI
27th Jul 2026541 PMAQI
27th Jul 2026562 PMAQI
27th Jul 2026583 PMAQI
27th Jul 2026564 PMAQI
27th Jul 2026565 PMAQI
27th Jul 2026566 PMAQI
27th Jul 2026547 PMAQI
27th Jul 2026548 PMAQI
27th Jul 2026539 PMAQI
27th Jul 20265010 PMAQI
27th Jul 20264911 PMAQI
28th Jul 20264512 AMAQI
28th Jul 2026451 AMAQI
28th Jul 2026452 AMAQI
28th Jul 2026473 AMAQI
28th Jul 2026514 AMAQI
28th Jul 2026485 AMAQI
25°C20/32°C
28th Jul 2026446 AMAQI
28th Jul 2026447 AMAQI
28th Jul 2026468 AMAQI
28th Jul 2026499 AMAQI
28th Jul 20265110 AMAQI
28th Jul 20265311 AMAQI
28th Jul 20265812 PMAQI
28th Jul 2026531 PMAQI
28th Jul 2026532 PMAQI
28th Jul 2026523 PMAQI
28th Jul 2026504 PMAQI
28th Jul 2026475 PMAQI
28th Jul 2026526 PMAQI
28th Jul 2026517 PMAQI
28th Jul 2026508 PMAQI
28th Jul 2026489 PMAQI
28th Jul 20265010 PMAQI
28th Jul 20264811 PMAQI
29th Jul 20264812 AMAQI
29th Jul 2026481 AMAQI
29th Jul 2026452 AMAQI
29th Jul 2026503 AMAQI
29th Jul 2026434 AMAQI
29th Jul 2026435 AMAQI
24°C20/31°C
29th Jul 2026466 AMAQI
29th Jul 2026447 AMAQI
29th Jul 2026458 AMAQI
29th Jul 2026509 AMAQI
29th Jul 20264810 AMAQI
29th Jul 20265011 AMAQI
29th Jul 20265212 PMAQI
29th Jul 2026521 PMAQI
29th Jul 2026562 PMAQI
29th Jul 2026563 PMAQI
29th Jul 2026544 PMAQI
29th Jul 2026505 PMAQI
29th Jul 2026496 PMAQI
29th Jul 2026467 PMAQI
29th Jul 2026478 PMAQI
29th Jul 2026509 PMAQI
29th Jul 20264710 PMAQI
29th Jul 20264211 PMAQI
30th Jul 20264412 AMAQI
30th Jul 2026421 AMAQI
30th Jul 2026452 AMAQI
30th Jul 2026523 AMAQI
30th Jul 2026484 AMAQI
30th Jul 2026445 AMAQI
24°C20/33°C
30th Jul 2026426 AMAQI
30th Jul 2026467 AMAQI
30th Jul 2026458 AMAQI
30th Jul 2026499 AMAQI
30th Jul 20264910 AMAQI
30th Jul 20265611 AMAQI
30th Jul 20265812 PMAQI
30th Jul 2026601 PMAQI
30th Jul 2026542 PMAQI
30th Jul 2026523 PMAQI
30th Jul 2026524 PMAQI
30th Jul 2026545 PMAQI
30th Jul 2026536 PMAQI
30th Jul 2026527 PMAQI
30th Jul 2026528 PMAQI
30th Jul 2026509 PMAQI
30th Jul 20264810 PMAQI
30th Jul 20264511 PMAQI
31st Jul 20264312 AMAQI
31st Jul 2026471 AMAQI
31st Jul 2026502 AMAQI
31st Jul 2026543 AMAQI
31st Jul 2026484 AMAQI
31st Jul 2026465 AMAQI
25°C20/34°C
31st Jul 2026496 AMAQI
31st Jul 2026447 AMAQI
31st Jul 2026478 AMAQI
31st Jul 2026489 AMAQI
31st Jul 20265410 AMAQI
31st Jul 20265611 AMAQI
31st Jul 20265712 PMAQI
31st Jul 2026581 PMAQI
31st Jul 2026612 PMAQI
31st Jul 2026623 PMAQI
31st Jul 2026604 PMAQI
31st Jul 2026605 PMAQI
31st Jul 2026546 PMAQI
31st Jul 2026567 PMAQI
31st Jul 2026488 PMAQI
31st Jul 2026489 PMAQI
31st Jul 20265010 PMAQI
31st Jul 20265011 PMAQI
1st Aug 20265212 AMAQI
1st Aug 2026501 AMAQI
1st Aug 2026512 AMAQI
1st Aug 2026493 AMAQI
1st Aug 2026464 AMAQI
1st Aug 2026495 AMAQI
25°C20/35°C
1st Aug 2026566 AMAQI
1st Aug 2026517 AMAQI
1st Aug 2026488 AMAQI
1st Aug 2026489 AMAQI
1st Aug 20264810 AMAQI
1st Aug 20265211 AMAQI
1st Aug 20265412 PMAQI
1st Aug 2026551 PMAQI
1st Aug 2026562 PMAQI
1st Aug 2026563 PMAQI
1st Aug 2026544 PMAQI
1st Aug 2026535 PMAQI
1st Aug 2026546 PMAQI
1st Aug 2026597 PMAQI
1st Aug 2026528 PMAQI
1st Aug 2026529 PMAQI
1st Aug 20265010 PMAQI
1st Aug 20264911 PMAQI
2nd Aug 20264612 AMAQI
2nd Aug 2026491 AMAQI
2nd Aug 2026512 AMAQI
2nd Aug 2026543 AMAQI
2nd Aug 2026564 AMAQI
2nd Aug 2026435 AMAQI
25°C21/33°C
2nd Aug 2026486 AMAQI
2nd Aug 2026497 AMAQI
2nd Aug 2026528 AMAQI
2nd Aug 2026529 AMAQI
2nd Aug 20265210 AMAQI
2nd Aug 20265411 AMAQI
2nd Aug 20265612 PMAQI
2nd Aug 2026561 PMAQI
2nd Aug 2026552 PMAQI
2nd Aug 2026563 PMAQI
2nd Aug 2026564 PMAQI
2nd Aug 2026545 PMAQI
2nd Aug 2026546 PMAQI
2nd Aug 2026567 PMAQI
2nd Aug 2026608 PMAQI
2nd Aug 2026599 PMAQI
2nd Aug 20265910 PMAQI
2nd Aug 20265511 PMAQI
3rd Aug 20265412 AMAQI
3rd Aug 2026521 AMAQI
3rd Aug 2026472 AMAQI
3rd Aug 2026523 AMAQI
3rd Aug 2026534 AMAQI
3rd Aug 2026505 AMAQI
25°C19/35°C
3rd Aug 2026496 AMAQI
3rd Aug 2026527 AMAQI
3rd Aug 2026498 AMAQI
3rd Aug 2026539 AMAQI
3rd Aug 20265810 AMAQI
3rd Aug 20265911 AMAQI
3rd Aug 20265812 PMAQI
3rd Aug 2026591 PMAQI
3rd Aug 2026622 PMAQI
3rd Aug 2026603 PMAQI
3rd Aug 2026624 PMAQI
3rd Aug 2026595 PMAQI
3rd Aug 2026606 PMAQI
3rd Aug 2026647 PMAQI
3rd Aug 2026588 PMAQI
3rd Aug 2026539 PMAQI
3rd Aug 20265010 PMAQI
3rd Aug 20264311 PMAQI
4th Aug 20264512 AMAQI
4th Aug 2026411 AMAQI
4th Aug 2026462 AMAQI
4th Aug 2026433 AMAQI
4th Aug 2026394 AMAQI
4th Aug 2026505 AMAQI
25°C21/33°C
4th Aug 2026486 AMAQI
4th Aug 2026517 AMAQI
4th Aug 2026498 AMAQI
4th Aug 2026489 AMAQI
4th Aug 20265110 AMAQI
4th Aug 20265211 AMAQI
4th Aug 20266012 PMAQI
4th Aug 2026581 PMAQI
4th Aug 2026582 PMAQI
4th Aug 2026613 PMAQI
4th Aug 2026534 PMAQI
4th Aug 2026515 PMAQI
4th Aug 2026526 PMAQI
4th Aug 2026497 PMAQI
4th Aug 2026488 PMAQI
4th Aug 2026489 PMAQI
4th Aug 20264810 PMAQI
4th Aug 20264511 PMAQI
5th Aug 20265012 AMAQI
5th Aug 2026461 AMAQI
5th Aug 2026502 AMAQI
5th Aug 2026463 AMAQI
5th Aug 2026504 AMAQI
5th Aug 2026465 AMAQI
23°C20/30°C
5th Aug 2026456 AMAQI
5th Aug 2026457 AMAQI
5th Aug 2026438 AMAQI
5th Aug 2026479 AMAQI
5th Aug 20265210 AMAQI
5th Aug 20265511 AMAQI
5th Aug 20265512 PMAQI
5th Aug 2026581 PMAQI
5th Aug 2026562 PMAQI
5th Aug 2026533 PMAQI
5th Aug 2026554 PMAQI
5th Aug 2026535 PMAQI
5th Aug 2026516 PMAQI
5th Aug 2026517 PMAQI
5th Aug 2026528 PMAQI
5th Aug 2026499 PMAQI
5th Aug 20264610 PMAQI
5th Aug 20264511 PMAQI
6th Aug 20262312 AMAQI
6th Aug 2026361 AMAQI
6th Aug 2026372 AMAQI
6th Aug 2026253 AMAQI
6th Aug 2026434 AMAQI
6th Aug 2026415 AMAQI
23°C19/32°C
6th Aug 2026386 AMAQI
6th Aug 2026417 AMAQI
6th Aug 2026478 AMAQI
6th Aug 2026509 AMAQI
6th Aug 20264810 AMAQI
6th Aug 20265811 AMAQI
6th Aug 20265612 PMAQI
6th Aug 2026541 PMAQI
6th Aug 2026572 PMAQI
6th Aug 2026543 PMAQI
6th Aug 2026504 PMAQI
6th Aug 2026515 PMAQI
6th Aug 2026446 PMAQI
6th Aug 2026427 PMAQI
6th Aug 2026448 PMAQI
6th Aug 2026449 PMAQI
6th Aug 20265010 PMAQI
6th Aug 20264611 PMAQI
7th Aug 20264312 AMAQI
7th Aug 2026441 AMAQI
7th Aug 2026412 AMAQI
7th Aug 2026483 AMAQI
7th Aug 2026494 AMAQI
7th Aug 2026505 AMAQI
25°C19/34°C
7th Aug 2026496 AMAQI
7th Aug 2026487 AMAQI
7th Aug 2026488 AMAQI
7th Aug 2026489 AMAQI
7th Aug 20265210 AMAQI
7th Aug 20265211 AMAQI
7th Aug 20265212 PMAQI
7th Aug 2026521 PMAQI
7th Aug 2026522 PMAQI
7th Aug 2026493 PMAQI
7th Aug 2026564 PMAQI
7th Aug 2026525 PMAQI
7th Aug 2026476 PMAQI
7th Aug 2026457 PMAQI
7th Aug 2026468 PMAQI
7th Aug 2026509 PMAQI
7th Aug 20265210 PMAQI
7th Aug 20265211 PMAQI
8th Aug 20265012 AMAQI
8th Aug 2026451 AMAQI
8th Aug 2026452 AMAQI
8th Aug 2026503 AMAQI
8th Aug 2026444 AMAQI
8th Aug 2026445 AMAQI
26°C20/35°C
8th Aug 2026426 AMAQI
8th Aug 2026477 AMAQI
8th Aug 2026428 AMAQI
8th Aug 2026449 AMAQI
8th Aug 20264810 AMAQI
8th Aug 20264811 AMAQI
8th Aug 20265212 PMAQI
8th Aug 2026501 PMAQI
8th Aug 2026522 PMAQI
8th Aug 2026483 PMAQI
8th Aug 2026464 PMAQI
8th Aug 2026465 PMAQI
8th Aug 2026446 PMAQI
8th Aug 2026427 PMAQI
8th Aug 2026398 PMAQI
8th Aug 2026409 PMAQI
8th Aug 20264510 PMAQI
8th Aug 20264911 PMAQI
9th Aug 20264712 AMAQI
9th Aug 2026471 AMAQI
9th Aug 2026492 AMAQI
9th Aug 2026503 AMAQI
9th Aug 2026484 AMAQI
9th Aug 2026445 AMAQI
26°C19/36°C
9th Aug 2026506 AMAQI
9th Aug 2026487 AMAQI
9th Aug 2026478 AMAQI
9th Aug 2026459 AMAQI
9th Aug 20265010 AMAQI
9th Aug 20265011 AMAQI
9th Aug 20265112 PMAQI
9th Aug 2026521 PMAQI
9th Aug 2026542 PMAQI
9th Aug 2026513 PMAQI
9th Aug 2026514 PMAQI
9th Aug 2026545 PMAQI
9th Aug 2026506 PMAQI
9th Aug 2026467 PMAQI
9th Aug 2026488 PMAQI
9th Aug 2026469 PMAQI
9th Aug 20264510 PMAQI
9th Aug 20265011 PMAQI
10th Aug 20265012 AMAQI
10th Aug 2026481 AMAQI
10th Aug 2026442 AMAQI
10th Aug 2026543 AMAQI
10th Aug 2026444 AMAQI
10th Aug 2026475 AMAQI
26°C20/37°C
10th Aug 2026436 AMAQI
10th Aug 2026487 AMAQI
10th Aug 2026478 AMAQI
10th Aug 2026489 AMAQI
10th Aug 20265010 AMAQI
10th Aug 20264611 AMAQI
10th Aug 20264812 PMAQI
10th Aug 2026491 PMAQI
10th Aug 2026472 PMAQI
10th Aug 2026483 PMAQI
10th Aug 2026474 PMAQI
10th Aug 2026445 PMAQI
10th Aug 2026416 PMAQI
10th Aug 2026407 PMAQI
10th Aug 2026548 PMAQI
10th Aug 2026429 PMAQI
10th Aug 20263810 PMAQI
10th Aug 20265011 PMAQI
11th Aug 20263412 AMAQI
11th Aug 2026361 AMAQI
11th Aug 2026462 AMAQI
11th Aug 2026423 AMAQI
11th Aug 2026354 AMAQI
11th Aug 2026235 AMAQI
26°C20/33°C
11th Aug 2026246 AMAQI
11th Aug 2026527 AMAQI
11th Aug 2026508 AMAQI
11th Aug 2026389 AMAQI
11th Aug 20264110 AMAQI
11th Aug 20264011 AMAQI
11th Aug 20264812 PMAQI
11th Aug 2026481 PMAQI
11th Aug 2026462 PMAQI
11th Aug 2026543 PMAQI
11th Aug 2026504 PMAQI
11th Aug 2026505 PMAQI
11th Aug 2026476 PMAQI
11th Aug 2026447 PMAQI
11th Aug 2026398 PMAQI
11th Aug 2026469 PMAQI
11th Aug 20265010 PMAQI
11th Aug 20262611 PMAQI
12th Aug 20264212 AMAQI
12th Aug 2026371 AMAQI
12th Aug 2026352 AMAQI
12th Aug 2026233 AMAQI
12th Aug 2026424 AMAQI
12th Aug 2026525 AMAQI
25°C21/34°C
12th Aug 2026406 AMAQI
12th Aug 2026467 AMAQI
12th Aug 2026508 AMAQI
12th Aug 2026449 AMAQI
12th Aug 20264410 AMAQI
12th Aug 20264211 AMAQI
12th Aug 20264712 PMAQI
12th Aug 2026511 PMAQI
12th Aug 2026522 PMAQI
12th Aug 2026463 PMAQI
12th Aug 2026474 PMAQI
12th Aug 2026455 PMAQI
12th Aug 2026466 PMAQI
12th Aug 2026407 PMAQI
12th Aug 2026468 PMAQI
12th Aug 2026489 PMAQI
12th Aug 20264210 PMAQI
12th Aug 20266011 PMAQI
13th Aug 20264012 AMAQI
13th Aug 2026481 AMAQI
13th Aug 2026462 AMAQI
13th Aug 2026343 AMAQI
13th Aug 2026444 AMAQI
13th Aug 2026425 AMAQI
24°C20/32°C
13th Aug 2026526 AMAQI
13th Aug 2026467 AMAQI
13th Aug 2026488 AMAQI
13th Aug 2026489 AMAQI
13th Aug 20265010 AMAQI
13th Aug 20264611 AMAQI
13th Aug 20263412 PMAQI
13th Aug 2026401 PMAQI
13th Aug 2026362 PMAQI
13th Aug 2026423 PMAQI
13th Aug 2026384 PMAQI
13th Aug 2026415 PMAQI
13th Aug 2026326 PMAQI
13th Aug 2026487 PMAQI
13th Aug 2026548 PMAQI
13th Aug 2026409 PMAQI
13th Aug 20264610 PMAQI
13th Aug 20261611 PMAQI
14th Aug 20261012 AMAQI
14th Aug 2026201 AMAQI
14th Aug 2026182 AMAQI
14th Aug 2026433 AMAQI
14th Aug 2026364 AMAQI
14th Aug 2026395 AMAQI
23°C20/29°C
14th Aug 2026406 AMAQI
14th Aug 2026387 AMAQI
14th Aug 2026338 AMAQI
14th Aug 2026239 AMAQI
14th Aug 20262810 AMAQI
14th Aug 20263211 AMAQI
14th Aug 20264612 PMAQI
14th Aug 2026461 PMAQI
14th Aug 2026502 PMAQI
14th Aug 2026463 PMAQI
14th Aug 2026414 PMAQI
14th Aug 2026415 PMAQI
14th Aug 2026466 PMAQI
14th Aug 2026537 PMAQI
14th Aug 2026428 PMAQI
14th Aug 2026469 PMAQI
14th Aug 20264810 PMAQI
14th Aug 20264611 PMAQI
15th Aug 20263812 AMAQI
15th Aug 2026421 AMAQI
15th Aug 2026332 AMAQI
15th Aug 2026403 AMAQI
15th Aug 2026444 AMAQI
15th Aug 2026385 AMAQI
24°C21/31°C
15th Aug 2026406 AMAQI
15th Aug 2026297 AMAQI
15th Aug 2026228 AMAQI
15th Aug 2026429 AMAQI
15th Aug 20264610 AMAQI
15th Aug 20265011 AMAQI
15th Aug 20264012 PMAQI
15th Aug 2026401 PMAQI
15th Aug 2026372 PMAQI
15th Aug 2026353 PMAQI
15th Aug 2026244 PMAQI
15th Aug 2026445 PMAQI
15th Aug 2026526 PMAQI
15th Aug 2026547 PMAQI
15th Aug 2026568 PMAQI
15th Aug 2026589 PMAQI
15th Aug 20265210 PMAQI
15th Aug 20265411 PMAQI
16th Aug 20265212 AMAQI
16th Aug 2026541 AMAQI
16th Aug 2026462 AMAQI
16th Aug 2026343 AMAQI
16th Aug 2026394 AMAQI
16th Aug 2026485 AMAQI
22°C18/26°C
16th Aug 2026446 AMAQI
6 AM16th Aug 2026467 AMAQI
16th Aug 2026428 AMAQI
16th Aug 2026459 AMAQI
16th Aug 20264210 AMAQI
16th Aug 20264411 AMAQI
16th Aug 20264012 PMAQI
12 PM16th Aug 2026441 PMAQI
16th Aug 2026332 PMAQI
16th Aug 2026273 PMAQI
16th Aug 2026474 PMAQI
16th Aug 2026495 PMAQI
16th Aug 2026456 PMAQI
16th Aug 2026587 PMAQI
7 PM16th Aug 2026778 PMAQI
16th Aug 2026589 PMAQI
16th Aug 20262110 PMAQI
16th Aug 20263011 PMAQI
12 AM
5 AM
23°C12/33°C
Day time
Avg. Highest Time
12 PM - 5 PM
52AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
6 AM - 9 AM
45AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 5 PM (Avg. 52), while the lowest AQI was between 6 AM to 9 AM (Avg. 45).
Night time
Avg. Highest Time
8 PM
51AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
12 AM - 5 AM
45AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 8 PM (Avg. 51), while the lowest AQI was between 12 AM to 5 AM (Avg. 45).
2026 Days Vs Air Quality
Signal Hill, California, United States
2026
95%
213
5%
12
Total number of days with different AQI categories in last 229 days in 2026 (136 days remaining)
Good
213 DaysModerate
12 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 229 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
Signal Hill, California, 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
21AQI (US)
21AQI (US)
2nd January 2026
31AQI (US)
31AQI (US)
3rd January 2026
16AQI (US)
16AQI (US)
4th January 2026
14AQI (US)
14AQI (US)
5th January 2026
26AQI (US)
26AQI (US)
6th January 2026
25AQI (US)
25AQI (US)
7th January 2026
24AQI (US)
24AQI (US)
8th January 2026
19AQI (US)
19AQI (US)
9th January 2026
24AQI (US)
24AQI (US)
10th January 2026
44AQI (US)
44AQI (US)
11th January 2026
38AQI (US)
38AQI (US)
12th January 2026
34AQI (US)
34AQI (US)
13th January 2026
38AQI (US)
38AQI (US)
14th January 2026
46AQI (US)
46AQI (US)
15th January 2026
34AQI (US)
34AQI (US)
16th January 2026
39AQI (US)
39AQI (US)
17th January 2026
36AQI (US)
36AQI (US)
18th January 2026
28AQI (US)
28AQI (US)
19th January 2026
46AQI (US)
46AQI (US)
20th January 2026
48AQI (US)
48AQI (US)
21st January 2026
69AQI (US)
69AQI (US)
22nd January 2026
38AQI (US)
38AQI (US)
23rd January 2026
32AQI (US)
32AQI (US)
24th January 2026
27AQI (US)
27AQI (US)
25th January 2026
28AQI (US)
28AQI (US)
26th January 2026
32AQI (US)
32AQI (US)
27th January 2026
32AQI (US)
32AQI (US)
28th January 2026
38AQI (US)
38AQI (US)
29th January 2026
46AQI (US)
46AQI (US)
30th January 2026
48AQI (US)
48AQI (US)
31st January 2026
30AQI (US)
30AQI (US)
1st February 2026
43AQI (US)
43AQI (US)
2nd February 2026
42AQI (US)
42AQI (US)
3rd February 2026
40AQI (US)
40AQI (US)
4th February 2026
35AQI (US)
35AQI (US)
5th February 2026
40AQI (US)
40AQI (US)
6th February 2026
32AQI (US)
32AQI (US)
7th February 2026
32AQI (US)
32AQI (US)
8th February 2026
34AQI (US)
34AQI (US)
9th February 2026
31AQI (US)
31AQI (US)
10th February 2026
28AQI (US)
28AQI (US)
11th February 2026
26AQI (US)
26AQI (US)
12th February 2026
25AQI (US)
25AQI (US)
13th February 2026
29AQI (US)
29AQI (US)
14th February 2026
32AQI (US)
32AQI (US)
15th February 2026
32AQI (US)
32AQI (US)
16th February 2026
30AQI (US)
30AQI (US)
17th February 2026
30AQI (US)
30AQI (US)
18th February 2026
23AQI (US)
23AQI (US)
19th February 2026
24AQI (US)
24AQI (US)
20th February 2026
22AQI (US)
22AQI (US)
21st February 2026
24AQI (US)
24AQI (US)
22nd February 2026
29AQI (US)
29AQI (US)
23rd February 2026
28AQI (US)
28AQI (US)
24th February 2026
30AQI (US)
30AQI (US)
25th February 2026
28AQI (US)
28AQI (US)
26th February 2026
25AQI (US)
25AQI (US)
27th February 2026
26AQI (US)
26AQI (US)
28th February 2026
26AQI (US)
26AQI (US)
1st March 2026
29AQI (US)
29AQI (US)
2nd March 2026
36AQI (US)
36AQI (US)
3rd March 2026
18AQI (US)
18AQI (US)
4th March 2026
24AQI (US)
24AQI (US)
5th March 2026
28AQI (US)
28AQI (US)
6th March 2026
21AQI (US)
21AQI (US)
7th March 2026
27AQI (US)
27AQI (US)
8th March 2026
20AQI (US)
20AQI (US)
9th March 2026
20AQI (US)
20AQI (US)
10th March 2026
21AQI (US)
21AQI (US)
11th March 2026
26AQI (US)
26AQI (US)
12th March 2026
28AQI (US)
28AQI (US)
13th March 2026
29AQI (US)
29AQI (US)
14th March 2026
22AQI (US)
22AQI (US)
15th March 2026
22AQI (US)
22AQI (US)
16th March 2026
29AQI (US)
29AQI (US)
17th March 2026
34AQI (US)
34AQI (US)
18th March 2026
32AQI (US)
32AQI (US)
19th March 2026
34AQI (US)
34AQI (US)
20th March 2026
32AQI (US)
32AQI (US)
21st March 2026
24AQI (US)
24AQI (US)
22nd March 2026
20AQI (US)
20AQI (US)
23rd March 2026
33AQI (US)
33AQI (US)
24th March 2026
30AQI (US)
30AQI (US)
25th March 2026
32AQI (US)
32AQI (US)
26th March 2026
30AQI (US)
30AQI (US)
27th March 2026
27AQI (US)
27AQI (US)
28th March 2026
28AQI (US)
28AQI (US)
29th March 2026
22AQI (US)
22AQI (US)
30th March 2026
22AQI (US)
22AQI (US)
31st March 2026
24AQI (US)
24AQI (US)
1st April 2026
26AQI (US)
26AQI (US)
2nd April 2026
17AQI (US)
17AQI (US)
3rd April 2026
22AQI (US)
22AQI (US)
4th April 2026
26AQI (US)
26AQI (US)
5th April 2026
25AQI (US)
25AQI (US)
6th April 2026
32AQI (US)
32AQI (US)
7th April 2026
31AQI (US)
31AQI (US)
8th April 2026
36AQI (US)
36AQI (US)
9th April 2026
27AQI (US)
27AQI (US)
10th April 2026
24AQI (US)
24AQI (US)
11th April 2026
46AQI (US)
46AQI (US)
12th April 2026
21AQI (US)
21AQI (US)
13th April 2026
18AQI (US)
18AQI (US)
14th April 2026
18AQI (US)
18AQI (US)
15th April 2026
29AQI (US)
29AQI (US)
16th April 2026
22AQI (US)
22AQI (US)
17th April 2026
18th April 2026
28AQI (US)
28AQI (US)
19th April 2026
26AQI (US)
26AQI (US)
20th April 2026
20AQI (US)
20AQI (US)
21st April 2026
24AQI (US)
24AQI (US)
22nd April 2026
23rd April 2026
20AQI (US)
20AQI (US)
24th April 2026
17AQI (US)
17AQI (US)
25th April 2026
26AQI (US)
26AQI (US)
26th April 2026
22AQI (US)
22AQI (US)
27th April 2026
18AQI (US)
18AQI (US)
28th April 2026
24AQI (US)
24AQI (US)
29th April 2026
27AQI (US)
27AQI (US)
30th April 2026
24AQI (US)
24AQI (US)
1st May 2026
40AQI (US)
40AQI (US)
2nd May 2026
30AQI (US)
30AQI (US)
3rd May 2026
22AQI (US)
22AQI (US)
4th May 2026
26AQI (US)
26AQI (US)
5th May 2026
30AQI (US)
30AQI (US)
6th May 2026
28AQI (US)
28AQI (US)
7th May 2026
34AQI (US)
34AQI (US)
8th May 2026
38AQI (US)
38AQI (US)
9th May 2026
10th May 2026
32AQI (US)
32AQI (US)
11th May 2026
37AQI (US)
37AQI (US)
12th May 2026
32AQI (US)
32AQI (US)
13th May 2026
35AQI (US)
35AQI (US)
14th May 2026
30AQI (US)
30AQI (US)
15th May 2026
40AQI (US)
40AQI (US)
16th May 2026
46AQI (US)
46AQI (US)
17th May 2026
58AQI (US)
58AQI (US)
18th May 2026
56AQI (US)
56AQI (US)
19th May 2026
54AQI (US)
54AQI (US)
20th May 2026
54AQI (US)
54AQI (US)
21st May 2026
41AQI (US)
41AQI (US)
22nd May 2026
50AQI (US)
50AQI (US)
23rd May 2026
49AQI (US)
49AQI (US)
24th May 2026
44AQI (US)
44AQI (US)
25th May 2026
43AQI (US)
43AQI (US)
26th May 2026
24AQI (US)
24AQI (US)
27th May 2026
20AQI (US)
20AQI (US)
28th May 2026
20AQI (US)
20AQI (US)
29th May 2026
16AQI (US)
16AQI (US)
30th May 2026
14AQI (US)
14AQI (US)
31st May 2026
21AQI (US)
21AQI (US)
1st June 2026
28AQI (US)
28AQI (US)
2nd June 2026
38AQI (US)
38AQI (US)
3rd June 2026
44AQI (US)
44AQI (US)
4th June 2026
35AQI (US)
35AQI (US)
5th June 2026
35AQI (US)
35AQI (US)
6th June 2026
24AQI (US)
24AQI (US)
7th June 2026
32AQI (US)
32AQI (US)
8th June 2026
32AQI (US)
32AQI (US)
9th June 2026
28AQI (US)
28AQI (US)
10th June 2026
31AQI (US)
31AQI (US)
11th June 2026
26AQI (US)
26AQI (US)
12th June 2026
26AQI (US)
26AQI (US)
13th June 2026
16AQI (US)
16AQI (US)
14th June 2026
22AQI (US)
22AQI (US)
15th June 2026
28AQI (US)
28AQI (US)
16th June 2026
24AQI (US)
24AQI (US)
17th June 2026
30AQI (US)
30AQI (US)
18th June 2026
28AQI (US)
28AQI (US)
19th June 2026
29AQI (US)
29AQI (US)
20th June 2026
26AQI (US)
26AQI (US)
21st June 2026
30AQI (US)
30AQI (US)
22nd June 2026
27AQI (US)
27AQI (US)
23rd June 2026
34AQI (US)
34AQI (US)
24th June 2026
32AQI (US)
32AQI (US)
25th June 2026
26AQI (US)
26AQI (US)
26th June 2026
28AQI (US)
28AQI (US)
27th June 2026
26AQI (US)
26AQI (US)
28th June 2026
23AQI (US)
23AQI (US)
29th June 2026
26AQI (US)
26AQI (US)
30th June 2026
36AQI (US)
36AQI (US)
1st July 2026
31AQI (US)
31AQI (US)
2nd July 2026
40AQI (US)
40AQI (US)
3rd July 2026
29AQI (US)
29AQI (US)
4th July 2026
26AQI (US)
26AQI (US)
5th July 2026
42AQI (US)
42AQI (US)
6th July 2026
28AQI (US)
28AQI (US)
7th July 2026
61AQI (US)
61AQI (US)
8th July 2026
33AQI (US)
33AQI (US)
9th July 2026
40AQI (US)
40AQI (US)
10th July 2026
30AQI (US)
30AQI (US)
11th July 2026
29AQI (US)
29AQI (US)
12th July 2026
27AQI (US)
27AQI (US)
13th July 2026
38AQI (US)
38AQI (US)
14th July 2026
48AQI (US)
48AQI (US)
15th July 2026
38AQI (US)
38AQI (US)
16th July 2026
38AQI (US)
38AQI (US)
17th July 2026
51AQI (US)
51AQI (US)
18th July 2026
48AQI (US)
48AQI (US)
19th July 2026
48AQI (US)
48AQI (US)
20th July 2026
50AQI (US)
50AQI (US)
21st July 2026
46AQI (US)
46AQI (US)
22nd July 2026
44AQI (US)
44AQI (US)
23rd July 2026
48AQI (US)
48AQI (US)
24th July 2026
50AQI (US)
50AQI (US)
25th July 2026
46AQI (US)
46AQI (US)
26th July 2026
52AQI (US)
52AQI (US)
27th July 2026
50AQI (US)
50AQI (US)
28th July 2026
49AQI (US)
49AQI (US)
29th July 2026
48AQI (US)
48AQI (US)
30th July 2026
50AQI (US)
50AQI (US)
31st July 2026
52AQI (US)
52AQI (US)
1st August 2026
52AQI (US)
52AQI (US)
2nd August 2026
54AQI (US)
54AQI (US)
3rd August 2026
55AQI (US)
55AQI (US)
4th August 2026
50AQI (US)
50AQI (US)
5th August 2026
50AQI (US)
50AQI (US)
6th August 2026
45AQI (US)
45AQI (US)
7th August 2026
49AQI (US)
49AQI (US)
8th August 2026
46AQI (US)
46AQI (US)
9th August 2026
49AQI (US)
49AQI (US)
10th August 2026
46AQI (US)
46AQI (US)
11th August 2026
42AQI (US)
42AQI (US)
12th August 2026
44AQI (US)
44AQI (US)
13th August 2026
42AQI (US)
42AQI (US)
14th August 2026
38AQI (US)
38AQI (US)
15th August 2026
42AQI (US)
42AQI (US)
16th August 2026
44AQI (US)
44AQI (US)
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
34AQI (US)
30AQI (US)
27AQI (US)
25AQI (US)
35AQI (US)
29AQI (US)
42AQI (US)
47AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202633AQI (US)
30
1
28
31
28
26
4
30
27
4
13
3
213
12
Highest AQI (US) recorded in
August47AQI (US)
Lowest AQI (US) recorded in
April25AQI (US)
202546AQI (US)
10
20
1
20
8
30
1
27
3
23
8
19
11
28
3
16
15
25
5
13
18
14
16
13
17
1
238
125
2
Highest AQI (US) recorded in
January61AQI (US)
Lowest AQI (US) recorded in
March35AQI (US)
202450AQI (US)
9
7
11
1
22
7
25
6
29
2
10
18
14
17
21
9
31
141
98
Highest AQI (US) recorded in
December70AQI (US)
Lowest AQI (US) recorded in
May38AQI (US)
202355AQI (US)
2
1
10
21
12
22
Highest AQI (US) recorded in
December56AQI (US)
Lowest AQI (US) recorded in
November46AQI (US)
202215AQI (US)
3
2
1
6
Highest AQI (US) recorded in
February21AQI (US)
Lowest AQI (US) recorded in
March3AQI (US)
202130AQI (US)
4
2
1
4
2
2
1
1
2
1
1
2
20
2
1
Highest AQI (US) recorded in
November91AQI (US)
Lowest AQI (US) recorded in
March0AQI (US)
202033AQI (US)
1
1
2
4
1
1
8
1
1
Highest AQI (US) recorded in
July129AQI (US)
Lowest AQI (US) recorded in
September2AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2023(Avg.)
55AQI (US)Least Polluted Year Recorded
2022(Avg.)
15AQI (US)Signal Hill's annual 2026 AQI (US) (33) shows an average percentage change of 4.6% (worsened AQI (US)) compared to previous years: 2020 (33), 2021 (30), 2022 (15), 2023 (55), 2024 (50), 2025 (46).
