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
2021
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2025
63AQILowest AQI recorded on
14th Aug 2021
25AQISame Day Analysis (10th August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 48 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Signal Hill, California, United States
AQI
Day
Night
.
6 AM10th Aug 2025
7 PM
5 AM11th Aug 2025
Day time
Avg. Highest Time
6PM10th Aug
54AQI
Avg. Lowest Time
8AM10th Aug
46AQI
Night time
Avg. Highest Time
9PM10th Aug
53AQI
Avg. Lowest Time
5AM11th Aug
40AQI
In the last 24 hours,
Signal Hill's AQI reached its highest point of 54 at 6 PM during the Day, while the lowest point, 40, was recorded at 5 AM during the Night between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Signal Hill, California, United States
JulAug
12th - 13th13th - 14th14th - 15th15th - 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
Day
Night
12th Jul 2025446 AMAQI
12th Jul 2025447 AMAQI
12th Jul 2025458 AMAQI
12th Jul 2025439 AMAQI
12th Jul 20254410 AMAQI
12th Jul 20254411 AMAQI
12th Jul 20254412 PMAQI
12th Jul 2025431 PMAQI
12th Jul 2025462 PMAQI
12th Jul 2025463 PMAQI
12th Jul 2025454 PMAQI
12th Jul 2025465 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025497 PMAQI
12th Jul 2025468 PMAQI
12th Jul 2025449 PMAQI
12th Jul 20254210 PMAQI
12th Jul 20254311 PMAQI
13th Jul 20254212 AMAQI
13th Jul 2025411 AMAQI
13th Jul 2025402 AMAQI
13th Jul 2025423 AMAQI
13th Jul 2025384 AMAQI
13th Jul 2025375 AMAQI
21°C17/26°C
13th Jul 2025396 AMAQI
13th Jul 2025447 AMAQI
13th Jul 2025498 AMAQI
13th Jul 2025519 AMAQI
13th Jul 20254810 AMAQI
13th Jul 20254911 AMAQI
13th Jul 20254912 PMAQI
13th Jul 2025501 PMAQI
13th Jul 2025512 PMAQI
13th Jul 2025493 PMAQI
13th Jul 2025474 PMAQI
13th Jul 2025485 PMAQI
13th Jul 2025466 PMAQI
13th Jul 2025487 PMAQI
13th Jul 2025418 PMAQI
13th Jul 2025379 PMAQI
13th Jul 20253910 PMAQI
13th Jul 20253611 PMAQI
14th Jul 20253712 AMAQI
14th Jul 2025381 AMAQI
14th Jul 2025362 AMAQI
14th Jul 2025343 AMAQI
14th Jul 2025334 AMAQI
14th Jul 2025325 AMAQI
21°C18/25°C
14th Jul 2025376 AMAQI
14th Jul 2025447 AMAQI
14th Jul 2025468 AMAQI
14th Jul 2025449 AMAQI
14th Jul 20254110 AMAQI
14th Jul 20253711 AMAQI
14th Jul 20253712 PMAQI
14th Jul 2025371 PMAQI
14th Jul 2025332 PMAQI
14th Jul 2025353 PMAQI
14th Jul 2025364 PMAQI
14th Jul 2025355 PMAQI
14th Jul 2025366 PMAQI
14th Jul 2025367 PMAQI
14th Jul 2025358 PMAQI
14th Jul 2025359 PMAQI
14th Jul 20254310 PMAQI
14th Jul 20254411 PMAQI
15th Jul 20253712 AMAQI
15th Jul 2025341 AMAQI
15th Jul 2025322 AMAQI
15th Jul 2025323 AMAQI
15th Jul 2025284 AMAQI
15th Jul 2025305 AMAQI
20°C17/25°C
15th Jul 2025306 AMAQI
15th Jul 2025287 AMAQI
15th Jul 2025288 AMAQI
15th Jul 2025269 AMAQI
15th Jul 20252610 AMAQI
15th Jul 20252911 AMAQI
15th Jul 20252912 PMAQI
15th Jul 2025301 PMAQI
15th Jul 2025312 PMAQI
15th Jul 2025323 PMAQI
15th Jul 2025284 PMAQI
15th Jul 2025295 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025277 PMAQI
15th Jul 2025268 PMAQI
15th Jul 2025239 PMAQI
15th Jul 20252110 PMAQI
15th Jul 20252011 PMAQI
16th Jul 20252112 AMAQI
16th Jul 2025211 AMAQI
16th Jul 2025202 AMAQI
16th Jul 2025253 AMAQI
16th Jul 2025274 AMAQI
16th Jul 2025195 AMAQI
21°C18/25°C
16th Jul 2025226 AMAQI
16th Jul 2025257 AMAQI
16th Jul 2025248 AMAQI
16th Jul 2025269 AMAQI
16th Jul 20252510 AMAQI
16th Jul 20252611 AMAQI
16th Jul 20252812 PMAQI
16th Jul 2025281 PMAQI
16th Jul 2025252 PMAQI
16th Jul 2025243 PMAQI
16th Jul 2025244 PMAQI
16th Jul 2025245 PMAQI
16th Jul 2025256 PMAQI
16th Jul 2025217 PMAQI
16th Jul 2025208 PMAQI
16th Jul 2025189 PMAQI
16th Jul 20251710 PMAQI
16th Jul 20251911 PMAQI
17th Jul 20252012 AMAQI
17th Jul 2025211 AMAQI
17th Jul 2025222 AMAQI
17th Jul 2025203 AMAQI
17th Jul 2025214 AMAQI
17th Jul 2025235 AMAQI
22°C18/26°C
17th Jul 2025226 AMAQI
17th Jul 2025207 AMAQI
17th Jul 2025188 AMAQI
17th Jul 2025209 AMAQI
17th Jul 20252410 AMAQI
17th Jul 20252711 AMAQI
17th Jul 20253212 PMAQI
17th Jul 2025311 PMAQI
17th Jul 2025322 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025344 PMAQI
17th Jul 2025345 PMAQI
17th Jul 2025316 PMAQI
17th Jul 2025247 PMAQI
17th Jul 2025238 PMAQI
17th Jul 2025249 PMAQI
17th Jul 20252410 PMAQI
17th Jul 20252511 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025281 AMAQI
18th Jul 2025262 AMAQI
18th Jul 2025253 AMAQI
18th Jul 2025214 AMAQI
18th Jul 2025205 AMAQI
22°C19/29°C
18th Jul 2025206 AMAQI
18th Jul 2025227 AMAQI
18th Jul 2025248 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20253010 AMAQI
18th Jul 20253411 AMAQI
18th Jul 20253512 PMAQI
18th Jul 2025351 PMAQI
18th Jul 2025332 PMAQI
18th Jul 2025303 PMAQI
18th Jul 2025284 PMAQI
18th Jul 2025275 PMAQI
18th Jul 2025316 PMAQI
18th Jul 2025287 PMAQI
18th Jul 2025278 PMAQI
18th Jul 2025289 PMAQI
18th Jul 20253210 PMAQI
18th Jul 20253211 PMAQI
19th Jul 20253312 AMAQI
19th Jul 2025331 AMAQI
19th Jul 2025342 AMAQI
19th Jul 2025373 AMAQI
19th Jul 2025464 AMAQI
19th Jul 2025475 AMAQI
21°C18/26°C
19th Jul 2025466 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025378 AMAQI
19th Jul 2025359 AMAQI
19th Jul 20253610 AMAQI
19th Jul 20253211 AMAQI
19th Jul 20252912 PMAQI
19th Jul 2025311 PMAQI
19th Jul 2025352 PMAQI
19th Jul 2025383 PMAQI
19th Jul 2025384 PMAQI
19th Jul 2025375 PMAQI
19th Jul 2025386 PMAQI
19th Jul 2025367 PMAQI
19th Jul 2025368 PMAQI
19th Jul 2025399 PMAQI
19th Jul 20253710 PMAQI
19th Jul 20253811 PMAQI
20th Jul 20254012 AMAQI
20th Jul 2025381 AMAQI
20th Jul 2025412 AMAQI
20th Jul 2025443 AMAQI
20th Jul 2025444 AMAQI
20th Jul 2025425 AMAQI
22°C19/27°C
20th Jul 2025406 AMAQI
20th Jul 2025387 AMAQI
20th Jul 2025368 AMAQI
20th Jul 2025349 AMAQI
20th Jul 20253410 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253312 PMAQI
20th Jul 2025321 PMAQI
20th Jul 2025342 PMAQI
20th Jul 2025363 PMAQI
20th Jul 2025364 PMAQI
20th Jul 2025365 PMAQI
20th Jul 2025386 PMAQI
20th Jul 2025397 PMAQI
20th Jul 2025398 PMAQI
20th Jul 2025389 PMAQI
20th Jul 20253610 PMAQI
20th Jul 20253611 PMAQI
21st Jul 20254712 AMAQI
21st Jul 2025461 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025363 AMAQI
21st Jul 2025344 AMAQI
21st Jul 2025375 AMAQI
21°C19/27°C
21st Jul 2025366 AMAQI
21st Jul 2025367 AMAQI
21st Jul 2025348 AMAQI
21st Jul 2025339 AMAQI
21st Jul 20253210 AMAQI
21st Jul 20253311 AMAQI
21st Jul 20253212 PMAQI
21st Jul 2025381 PMAQI
21st Jul 2025422 PMAQI
21st Jul 2025333 PMAQI
21st Jul 2025304 PMAQI
21st Jul 2025335 PMAQI
21st Jul 2025326 PMAQI
21st Jul 2025337 PMAQI
21st Jul 2025318 PMAQI
21st Jul 2025279 PMAQI
21st Jul 20252910 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253612 AMAQI
22nd Jul 2025341 AMAQI
22nd Jul 2025322 AMAQI
22nd Jul 2025273 AMAQI
22nd Jul 2025224 AMAQI
22nd Jul 2025235 AMAQI
21°C18/26°C
22nd Jul 2025226 AMAQI
22nd Jul 2025227 AMAQI
22nd Jul 2025228 AMAQI
22nd Jul 2025249 AMAQI
22nd Jul 20252410 AMAQI
22nd Jul 20252611 AMAQI
22nd Jul 20252612 PMAQI
22nd Jul 2025261 PMAQI
22nd Jul 2025272 PMAQI
22nd Jul 2025253 PMAQI
22nd Jul 2025234 PMAQI
22nd Jul 2025255 PMAQI
22nd Jul 2025266 PMAQI
22nd Jul 2025247 PMAQI
22nd Jul 2025248 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252510 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252412 AMAQI
23rd Jul 2025271 AMAQI
23rd Jul 2025272 AMAQI
23rd Jul 2025263 AMAQI
23rd Jul 2025244 AMAQI
23rd Jul 2025255 AMAQI
21°C19/25°C
23rd Jul 2025296 AMAQI
23rd Jul 2025297 AMAQI
23rd Jul 2025278 AMAQI
23rd Jul 2025329 AMAQI
23rd Jul 20253610 AMAQI
23rd Jul 20254011 AMAQI
23rd Jul 20253912 PMAQI
23rd Jul 2025381 PMAQI
23rd Jul 2025342 PMAQI
23rd Jul 2025363 PMAQI
23rd Jul 2025354 PMAQI
23rd Jul 2025365 PMAQI
23rd Jul 2025336 PMAQI
23rd Jul 2025277 PMAQI
23rd Jul 2025278 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252410 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252512 AMAQI
24th Jul 2025241 AMAQI
24th Jul 2025282 AMAQI
24th Jul 2025343 AMAQI
24th Jul 2025244 AMAQI
24th Jul 2025205 AMAQI
22°C18/28°C
24th Jul 2025266 AMAQI
24th Jul 2025337 AMAQI
24th Jul 2025298 AMAQI
24th Jul 2025259 AMAQI
24th Jul 20252410 AMAQI
24th Jul 20252411 AMAQI
24th Jul 20252612 PMAQI
24th Jul 2025301 PMAQI
24th Jul 2025312 PMAQI
24th Jul 2025293 PMAQI
24th Jul 2025264 PMAQI
24th Jul 2025265 PMAQI
24th Jul 2025326 PMAQI
24th Jul 2025277 PMAQI
24th Jul 2025278 PMAQI
24th Jul 2025279 PMAQI
24th Jul 20252310 PMAQI
24th Jul 20252011 PMAQI
25th Jul 20251812 AMAQI
25th Jul 2025201 AMAQI
25th Jul 2025212 AMAQI
25th Jul 2025233 AMAQI
25th Jul 2025204 AMAQI
25th Jul 2025235 AMAQI
21°C17/26°C
25th Jul 2025366 AMAQI
25th Jul 2025347 AMAQI
25th Jul 2025278 AMAQI
25th Jul 2025239 AMAQI
25th Jul 20252410 AMAQI
25th Jul 20252611 AMAQI
25th Jul 20252612 PMAQI
25th Jul 2025251 PMAQI
25th Jul 2025242 PMAQI
25th Jul 2025253 PMAQI
25th Jul 2025254 PMAQI
25th Jul 2025225 PMAQI
25th Jul 2025216 PMAQI
25th Jul 2025227 PMAQI
25th Jul 2025228 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20252010 PMAQI
25th Jul 20252011 PMAQI
26th Jul 20252012 AMAQI
26th Jul 2025231 AMAQI
26th Jul 2025282 AMAQI
26th Jul 2025263 AMAQI
26th Jul 2025244 AMAQI
26th Jul 2025275 AMAQI
20°C18/25°C
26th Jul 2025296 AMAQI
26th Jul 2025367 AMAQI
26th Jul 2025278 AMAQI
26th Jul 2025259 AMAQI
26th Jul 20252510 AMAQI
26th Jul 20252511 AMAQI
26th Jul 20252412 PMAQI
26th Jul 2025221 PMAQI
26th Jul 2025212 PMAQI
26th Jul 2025233 PMAQI
26th Jul 2025234 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025266 PMAQI
26th Jul 2025247 PMAQI
26th Jul 2025238 PMAQI
26th Jul 2025209 PMAQI
26th Jul 20252310 PMAQI
26th Jul 20252811 PMAQI
27th Jul 20252612 AMAQI
27th Jul 2025261 AMAQI
27th Jul 2025252 AMAQI
27th Jul 2025253 AMAQI
27th Jul 2025244 AMAQI
27th Jul 2025235 AMAQI
21°C18/27°C
27th Jul 2025256 AMAQI
27th Jul 2025247 AMAQI
27th Jul 2025268 AMAQI
27th Jul 2025369 AMAQI
27th Jul 20253210 AMAQI
27th Jul 20253211 AMAQI
27th Jul 20253212 PMAQI
27th Jul 2025341 PMAQI
27th Jul 2025332 PMAQI
27th Jul 2025313 PMAQI
27th Jul 2025304 PMAQI
27th Jul 2025295 PMAQI
27th Jul 2025296 PMAQI
27th Jul 2025307 PMAQI
27th Jul 2025298 PMAQI
27th Jul 2025289 PMAQI
27th Jul 20252710 PMAQI
27th Jul 20252811 PMAQI
28th Jul 20252812 AMAQI
28th Jul 2025261 AMAQI
28th Jul 2025242 AMAQI
28th Jul 2025263 AMAQI
28th Jul 2025254 AMAQI
28th Jul 2025265 AMAQI
21°C16/25°C
28th Jul 2025266 AMAQI
28th Jul 2025257 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025259 AMAQI
28th Jul 20252710 AMAQI
28th Jul 20252911 AMAQI
28th Jul 20253212 PMAQI
28th Jul 2025331 PMAQI
28th Jul 2025342 PMAQI
28th Jul 2025373 PMAQI
28th Jul 2025384 PMAQI
28th Jul 2025375 PMAQI
28th Jul 2025356 PMAQI
28th Jul 2025297 PMAQI
28th Jul 2025298 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20252910 PMAQI
28th Jul 20252811 PMAQI
29th Jul 20253012 AMAQI
29th Jul 2025311 AMAQI
29th Jul 2025332 AMAQI
29th Jul 2025333 AMAQI
29th Jul 2025334 AMAQI
29th Jul 2025325 AMAQI
21°C18/26°C
29th Jul 2025326 AMAQI
29th Jul 2025327 AMAQI
29th Jul 2025308 AMAQI
29th Jul 2025319 AMAQI
29th Jul 20253610 AMAQI
29th Jul 20254011 AMAQI
29th Jul 20254112 PMAQI
29th Jul 2025491 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025473 PMAQI
29th Jul 2025464 PMAQI
29th Jul 2025445 PMAQI
29th Jul 2025416 PMAQI
29th Jul 2025367 PMAQI
29th Jul 2025358 PMAQI
29th Jul 2025369 PMAQI
29th Jul 20253510 PMAQI
29th Jul 20253611 PMAQI
30th Jul 20254012 AMAQI
30th Jul 2025391 AMAQI
30th Jul 2025382 AMAQI
30th Jul 2025403 AMAQI
30th Jul 2025414 AMAQI
30th Jul 2025405 AMAQI
21°C18/29°C
30th Jul 2025386 AMAQI
30th Jul 2025367 AMAQI
30th Jul 2025378 AMAQI
30th Jul 2025379 AMAQI
30th Jul 20254110 AMAQI
30th Jul 20254511 AMAQI
30th Jul 20254812 PMAQI
30th Jul 2025491 PMAQI
30th Jul 2025492 PMAQI
30th Jul 2025493 PMAQI
30th Jul 2025494 PMAQI
30th Jul 2025495 PMAQI
30th Jul 2025496 PMAQI
30th Jul 2025497 PMAQI
30th Jul 2025498 PMAQI
30th Jul 2025509 PMAQI
30th Jul 20254510 PMAQI
30th Jul 20254511 PMAQI
31st Jul 20254512 AMAQI
31st Jul 2025451 AMAQI
31st Jul 2025482 AMAQI
31st Jul 2025493 AMAQI
31st Jul 2025474 AMAQI
31st Jul 2025455 AMAQI
22°C18/28°C
31st Jul 2025436 AMAQI
31st Jul 2025417 AMAQI
31st Jul 2025398 AMAQI
31st Jul 2025379 AMAQI
31st Jul 20253910 AMAQI
31st Jul 20254211 AMAQI
31st Jul 20254712 PMAQI
31st Jul 2025511 PMAQI
31st Jul 2025562 PMAQI
31st Jul 2025573 PMAQI
31st Jul 2025564 PMAQI
31st Jul 2025565 PMAQI
31st Jul 2025556 PMAQI
31st Jul 2025517 PMAQI
31st Jul 2025528 PMAQI
31st Jul 2025519 PMAQI
31st Jul 20255010 PMAQI
31st Jul 20255211 PMAQI
1st Aug 20254712 AMAQI
1st Aug 2025471 AMAQI
1st Aug 2025442 AMAQI
1st Aug 2025413 AMAQI
1st Aug 2025464 AMAQI
1st Aug 2025545 AMAQI
22°C17/28°C
1st Aug 2025526 AMAQI
1st Aug 2025477 AMAQI
1st Aug 2025458 AMAQI
1st Aug 2025459 AMAQI
1st Aug 20254710 AMAQI
1st Aug 20254811 AMAQI
1st Aug 20255212 PMAQI
1st Aug 2025531 PMAQI
1st Aug 2025542 PMAQI
1st Aug 2025533 PMAQI
1st Aug 2025534 PMAQI
1st Aug 2025525 PMAQI
1st Aug 2025476 PMAQI
1st Aug 2025517 PMAQI
1st Aug 2025468 PMAQI
1st Aug 2025469 PMAQI
1st Aug 20254910 PMAQI
1st Aug 20254611 PMAQI
2nd Aug 20254512 AMAQI
2nd Aug 2025401 AMAQI
2nd Aug 2025382 AMAQI
2nd Aug 2025373 AMAQI
2nd Aug 2025414 AMAQI
2nd Aug 2025465 AMAQI
22°C18/29°C
2nd Aug 2025516 AMAQI
2nd Aug 2025527 AMAQI
2nd Aug 2025518 AMAQI
2nd Aug 2025509 AMAQI
2nd Aug 20255110 AMAQI
2nd Aug 20255011 AMAQI
2nd Aug 20255112 PMAQI
2nd Aug 2025521 PMAQI
2nd Aug 2025542 PMAQI
2nd Aug 2025523 PMAQI
2nd Aug 2025504 PMAQI
2nd Aug 2025525 PMAQI
2nd Aug 2025496 PMAQI
2nd Aug 2025487 PMAQI
2nd Aug 2025458 PMAQI
2nd Aug 2025469 PMAQI
2nd Aug 20254610 PMAQI
2nd Aug 20254511 PMAQI
3rd Aug 20254712 AMAQI
3rd Aug 2025461 AMAQI
3rd Aug 2025482 AMAQI
3rd Aug 2025493 AMAQI
3rd Aug 2025474 AMAQI
3rd Aug 2025475 AMAQI
22°C18/29°C
3rd Aug 2025496 AMAQI
3rd Aug 2025527 AMAQI
3rd Aug 2025538 AMAQI
3rd Aug 2025509 AMAQI
3rd Aug 20254810 AMAQI
3rd Aug 20254811 AMAQI
3rd Aug 20254412 PMAQI
3rd Aug 2025421 PMAQI
3rd Aug 2025472 PMAQI
3rd Aug 2025503 PMAQI
3rd Aug 2025524 PMAQI
3rd Aug 2025525 PMAQI
3rd Aug 2025526 PMAQI
3rd Aug 2025477 PMAQI
3rd Aug 2025498 PMAQI
3rd Aug 2025499 PMAQI
3rd Aug 20255010 PMAQI
3rd Aug 20255111 PMAQI
4th Aug 20255212 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025532 AMAQI
4th Aug 2025543 AMAQI
4th Aug 2025544 AMAQI
4th Aug 2025545 AMAQI
22°C17/30°C
4th Aug 2025546 AMAQI
4th Aug 2025557 AMAQI
4th Aug 2025548 AMAQI
4th Aug 2025559 AMAQI
4th Aug 20255510 AMAQI
4th Aug 20255511 AMAQI
4th Aug 20255612 PMAQI
4th Aug 2025541 PMAQI
4th Aug 2025562 PMAQI
4th Aug 2025573 PMAQI
4th Aug 2025584 PMAQI
4th Aug 2025605 PMAQI
4th Aug 2025616 PMAQI
4th Aug 2025567 PMAQI
4th Aug 2025588 PMAQI
4th Aug 2025619 PMAQI
4th Aug 20256110 PMAQI
4th Aug 20256211 PMAQI
5th Aug 20256112 AMAQI
5th Aug 2025611 AMAQI
5th Aug 2025622 AMAQI
5th Aug 2025623 AMAQI
5th Aug 2025594 AMAQI
5th Aug 2025595 AMAQI
22°C18/28°C
5th Aug 2025596 AMAQI
5th Aug 2025617 AMAQI
5th Aug 2025598 AMAQI
5th Aug 2025609 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20256011 AMAQI
5th Aug 20256012 PMAQI
5th Aug 2025611 PMAQI
5th Aug 2025622 PMAQI
5th Aug 2025643 PMAQI
5th Aug 2025664 PMAQI
5th Aug 2025665 PMAQI
5th Aug 2025666 PMAQI
5th Aug 2025637 PMAQI
5th Aug 2025638 PMAQI
5th Aug 2025659 PMAQI
5th Aug 20256410 PMAQI
5th Aug 20256211 PMAQI
6th Aug 20256312 AMAQI
6th Aug 2025621 AMAQI
6th Aug 2025622 AMAQI
6th Aug 2025603 AMAQI
6th Aug 2025584 AMAQI
6th Aug 2025555 AMAQI
23°C18/29°C
6th Aug 2025606 AMAQI
6th Aug 2025627 AMAQI
6th Aug 2025578 AMAQI
6th Aug 2025569 AMAQI
6th Aug 20255610 AMAQI
6th Aug 20256011 AMAQI
6th Aug 20256512 PMAQI
6th Aug 2025681 PMAQI
6th Aug 2025702 PMAQI
6th Aug 2025693 PMAQI
6th Aug 2025704 PMAQI
6th Aug 2025745 PMAQI
6th Aug 2025746 PMAQI
6th Aug 2025617 PMAQI
6th Aug 2025658 PMAQI
6th Aug 2025649 PMAQI
6th Aug 20256210 PMAQI
6th Aug 20255811 PMAQI
7th Aug 20255812 AMAQI
7th Aug 2025551 AMAQI
7th Aug 2025562 AMAQI
7th Aug 2025573 AMAQI
7th Aug 2025544 AMAQI
7th Aug 2025535 AMAQI
24°C18/31°C
7th Aug 2025546 AMAQI
7th Aug 2025537 AMAQI
7th Aug 2025548 AMAQI
7th Aug 2025549 AMAQI
7th Aug 20255410 AMAQI
7th Aug 20255711 AMAQI
7th Aug 20255912 PMAQI
7th Aug 2025591 PMAQI
7th Aug 2025612 PMAQI
7th Aug 2025613 PMAQI
7th Aug 2025624 PMAQI
7th Aug 2025605 PMAQI
7th Aug 2025586 PMAQI
7th Aug 2025587 PMAQI
7th Aug 2025578 PMAQI
7th Aug 2025569 PMAQI
7th Aug 20255410 PMAQI
7th Aug 20255211 PMAQI
8th Aug 20255412 AMAQI
8th Aug 2025531 AMAQI
8th Aug 2025522 AMAQI
8th Aug 2025523 AMAQI
8th Aug 2025504 AMAQI
8th Aug 2025465 AMAQI
25°C19/35°C
8th Aug 2025436 AMAQI
8th Aug 2025437 AMAQI
8th Aug 2025438 AMAQI
8th Aug 2025449 AMAQI
8th Aug 20254010 AMAQI
8th Aug 20254011 AMAQI
8th Aug 20254712 PMAQI
8th Aug 2025491 PMAQI
8th Aug 2025472 PMAQI
8th Aug 2025493 PMAQI
8th Aug 2025484 PMAQI
8th Aug 2025485 PMAQI
8th Aug 2025476 PMAQI
8th Aug 2025497 PMAQI
8th Aug 2025508 PMAQI
8th Aug 2025499 PMAQI
8th Aug 20254910 PMAQI
8th Aug 20254911 PMAQI
9th Aug 20254912 AMAQI
9th Aug 2025521 AMAQI
9th Aug 2025532 AMAQI
9th Aug 2025533 AMAQI
9th Aug 2025504 AMAQI
9th Aug 2025535 AMAQI
25°C19/31°C
9th Aug 2025506 AMAQI
9th Aug 2025467 AMAQI
9th Aug 2025488 AMAQI
9th Aug 2025509 AMAQI
9th Aug 20255010 AMAQI
9th Aug 20255411 AMAQI
9th Aug 20255612 PMAQI
9th Aug 2025571 PMAQI
9th Aug 2025592 PMAQI
9th Aug 2025593 PMAQI
9th Aug 2025594 PMAQI
9th Aug 2025575 PMAQI
9th Aug 2025566 PMAQI
9th Aug 2025547 PMAQI
9th Aug 2025538 PMAQI
9th Aug 2025529 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255111 PMAQI
10th Aug 20254812 AMAQI
10th Aug 2025461 AMAQI
10th Aug 2025472 AMAQI
10th Aug 2025473 AMAQI
10th Aug 2025424 AMAQI
10th Aug 2025445 AMAQI
22°C19/28°C
10th Aug 2025486 AMAQI
10th Aug 2025537 AMAQI
10th Aug 2025468 AMAQI
10th Aug 2025489 AMAQI
10th Aug 20254910 AMAQI
10th Aug 20255311 AMAQI
10th Aug 20255212 PMAQI
10th Aug 2025521 PMAQI
10th Aug 2025502 PMAQI
10th Aug 2025503 PMAQI
10th Aug 2025514 PMAQI
10th Aug 2025525 PMAQI
10th Aug 2025546 PMAQI
10th Aug 2025527 PMAQI
10th Aug 2025528 PMAQI
10th Aug 2025539 PMAQI
10th Aug 20255310 PMAQI
10th Aug 20255311 PMAQI
11th Aug 20255312 AMAQI
11th Aug 2025521 AMAQI
11th Aug 2025512 AMAQI
11th Aug 2025493 AMAQI
11th Aug 2025444 AMAQI
11th Aug 2025405 AMAQI
22°C18/28°C
11th Aug 2025406 AMAQI
6 AM11th Aug 2025427 AMAQI
11th Aug 2025458 AMAQI
11th Aug 2025459 AMAQI
12 PM
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 7 PM
41AQI
14 hours / Day
420 hours / Month
Avg. Lowest Time
6 AM - 7 PM
41AQI
14 hours / Day
420 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 PM (Avg. 41), while the lowest AQI was between 6 AM to 7 PM (Avg. 41).
Night time
Avg. Highest Time
12 AM - 11 PM
39AQI
10 hours / Day
300 hours / Month
Avg. Lowest Time
12 AM - 11 PM
39AQI
10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 39), while the lowest AQI was between 12 AM to 11 PM (Avg. 39).
2025 Days Vs Air Quality
Signal Hill, California, United States
2025
73%
161
27%
60
0.4%
1
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
161 DaysModerate
60 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 223 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
Signal Hill, 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.
1st January 2025
122AQI
122AQI
2nd January 2025
97AQI
97AQI
3rd January 2025
73AQI
73AQI
4th January 2025
72AQI
72AQI
5th January 2025
65AQI
65AQI
6th January 2025
60AQI
60AQI
7th January 2025
57AQI
57AQI
8th January 2025
75AQI
75AQI
9th January 2025
87AQI
87AQI
10th January 2025
72AQI
72AQI
11th January 2025
63AQI
63AQI
12th January 2025
50AQI
50AQI
13th January 2025
45AQI
45AQI
14th January 2025
46AQI
46AQI
15th January 2025
48AQI
48AQI
16th January 2025
49AQI
49AQI
17th January 2025
51AQI
51AQI
18th January 2025
56AQI
56AQI
19th January 2025
71AQI
71AQI
20th January 2025
61AQI
61AQI
21st January 2025
43AQI
43AQI
22nd January 2025
52AQI
52AQI
23rd January 2025
53AQI
53AQI
24th January 2025
46AQI
46AQI
25th January 2025
60AQI
60AQI
26th January 2025
46AQI
46AQI
27th January 2025
44AQI
44AQI
28th January 2025
46AQI
46AQI
29th January 2025
51AQI
51AQI
30th January 2025
54AQI
54AQI
31st January 2025
66AQI
66AQI
1st February 2025
68AQI
68AQI
2nd February 2025
73AQI
73AQI
3rd February 2025
64AQI
64AQI
4th February 2025
43AQI
43AQI
5th February 2025
32AQI
32AQI
6th February 2025
30AQI
30AQI
7th February 2025
24AQI
24AQI
8th February 2025
31AQI
31AQI
9th February 2025
42AQI
42AQI
10th February 2025
39AQI
39AQI
11th February 2025
32AQI
32AQI
12th February 2025
31AQI
31AQI
13th February 2025
21AQI
21AQI
14th February 2025
22AQI
22AQI
15th February 2025
28AQI
28AQI
16th February 2025
42AQI
42AQI
17th February 2025
50AQI
50AQI
18th February 2025
43AQI
43AQI
19th February 2025
55AQI
55AQI
20th February 2025
53AQI
53AQI
21st February 2025
46AQI
46AQI
22nd February 2025
50AQI
50AQI
23rd February 2025
51AQI
51AQI
24th February 2025
56AQI
56AQI
25th February 2025
48AQI
48AQI
26th February 2025
53AQI
53AQI
27th February 2025
48AQI
48AQI
28th February 2025
45AQI
45AQI
1st March 2025
32AQI
32AQI
2nd March 2025
31AQI
31AQI
3rd March 2025
29AQI
29AQI
4th March 2025
35AQI
35AQI
5th March 2025
44AQI
44AQI
6th March 2025
22AQI
22AQI
7th March 2025
30AQI
30AQI
8th March 2025
40AQI
40AQI
9th March 2025
41AQI
41AQI
10th March 2025
41AQI
41AQI
11th March 2025
29AQI
29AQI
12th March 2025
26AQI
26AQI
13th March 2025
22AQI
22AQI
14th March 2025
23AQI
23AQI
15th March 2025
33AQI
33AQI
16th March 2025
46AQI
46AQI
17th March 2025
44AQI
44AQI
18th March 2025
28AQI
28AQI
19th March 2025
28AQI
28AQI
20th March 2025
33AQI
33AQI
21st March 2025
42AQI
42AQI
22nd March 2025
40AQI
40AQI
23rd March 2025
44AQI
44AQI
24th March 2025
46AQI
46AQI
25th March 2025
51AQI
51AQI
26th March 2025
35AQI
35AQI
27th March 2025
24AQI
24AQI
28th March 2025
35AQI
35AQI
29th March 2025
40AQI
40AQI
30th March 2025
33AQI
33AQI
31st March 2025
22AQI
22AQI
1st April 2025
29AQI
29AQI
2nd April 2025
33AQI
33AQI
3rd April 2025
37AQI
37AQI
4th April 2025
40AQI
40AQI
5th April 2025
31AQI
31AQI
6th April 2025
34AQI
34AQI
7th April 2025
40AQI
40AQI
8th April 2025
44AQI
44AQI
9th April 2025
51AQI
51AQI
10th April 2025
50AQI
50AQI
11th April 2025
46AQI
46AQI
12th April 2025
49AQI
49AQI
13th April 2025
49AQI
49AQI
14th April 2025
51AQI
51AQI
15th April 2025
45AQI
45AQI
16th April 2025
40AQI
40AQI
17th April 2025
29AQI
29AQI
18th April 2025
33AQI
33AQI
19th April 2025
42AQI
42AQI
20th April 2025
45AQI
45AQI
21st April 2025
51AQI
51AQI
22nd April 2025
51AQI
51AQI
23rd April 2025
43AQI
43AQI
24th April 2025
42AQI
42AQI
25th April 2025
36AQI
36AQI
26th April 2025
21AQI
21AQI
27th April 2025
18AQI
18AQI
28th April 2025
28AQI
28AQI
29th April 2025
42AQI
42AQI
30th April 2025
43AQI
43AQI
1st May 2025
34AQI
34AQI
2nd May 2025
39AQI
39AQI
3rd May 2025
28AQI
28AQI
4th May 2025
36AQI
36AQI
5th May 2025
37AQI
37AQI
6th May 2025
37AQI
37AQI
7th May 2025
42AQI
42AQI
8th May 2025
49AQI
49AQI
9th May 2025
51AQI
51AQI
10th May 2025
46AQI
46AQI
11th May 2025
55AQI
55AQI
12th May 2025
45AQI
45AQI
13th May 2025
25AQI
25AQI
14th May 2025
35AQI
35AQI
15th May 2025
49AQI
49AQI
16th May 2025
51AQI
51AQI
17th May 2025
42AQI
42AQI
18th May 2025
33AQI
33AQI
19th May 2025
44AQI
44AQI
20th May 2025
53AQI
53AQI
21st May 2025
52AQI
52AQI
22nd May 2025
53AQI
53AQI
23rd May 2025
53AQI
53AQI
24th May 2025
52AQI
52AQI
25th May 2025
47AQI
47AQI
26th May 2025
47AQI
47AQI
27th May 2025
43AQI
43AQI
28th May 2025
44AQI
44AQI
29th May 2025
36AQI
36AQI
30th May 2025
42AQI
42AQI
31st May 2025
46AQI
46AQI
1st June 2025
45AQI
45AQI
2nd June 2025
34AQI
34AQI
3rd June 2025
30AQI
30AQI
4th June 2025
31AQI
31AQI
5th June 2025
26AQI
26AQI
6th June 2025
28AQI
28AQI
7th June 2025
32AQI
32AQI
8th June 2025
31AQI
31AQI
9th June 2025
33AQI
33AQI
10th June 2025
37AQI
37AQI
11th June 2025
44AQI
44AQI
12th June 2025
41AQI
41AQI
13th June 2025
49AQI
49AQI
14th June 2025
51AQI
51AQI
15th June 2025
53AQI
53AQI
16th June 2025
57AQI
57AQI
17th June 2025
58AQI
58AQI
18th June 2025
57AQI
57AQI
19th June 2025
54AQI
54AQI
20th June 2025
53AQI
53AQI
21st June 2025
54AQI
54AQI
22nd June 2025
53AQI
53AQI
23rd June 2025
54AQI
54AQI
24th June 2025
51AQI
51AQI
25th June 2025
47AQI
47AQI
26th June 2025
47AQI
47AQI
27th June 2025
50AQI
50AQI
28th June 2025
49AQI
49AQI
29th June 2025
45AQI
45AQI
30th June 2025
37AQI
37AQI
1st July 2025
41AQI
41AQI
2nd July 2025
41AQI
41AQI
3rd July 2025
37AQI
37AQI
4th July 2025
41AQI
41AQI
5th July 2025
80AQI
80AQI
6th July 2025
59AQI
59AQI
7th July 2025
55AQI
55AQI
8th July 2025
42AQI
42AQI
9th July 2025
38AQI
38AQI
10th July 2025
44AQI
44AQI
11th July 2025
46AQI
46AQI
12th July 2025
46AQI
46AQI
13th July 2025
43AQI
43AQI
14th July 2025
37AQI
37AQI
15th July 2025
28AQI
28AQI
16th July 2025
23AQI
23AQI
17th July 2025
25AQI
25AQI
18th July 2025
28AQI
28AQI
19th July 2025
37AQI
37AQI
20th July 2025
38AQI
38AQI
21st July 2025
35AQI
35AQI
22nd July 2025
26AQI
26AQI
23rd July 2025
29AQI
29AQI
24th July 2025
26AQI
26AQI
25th July 2025
23AQI
23AQI
26th July 2025
25AQI
25AQI
27th July 2025
28AQI
28AQI
28th July 2025
29AQI
29AQI
29th July 2025
36AQI
36AQI
30th July 2025
44AQI
44AQI
31st July 2025
48AQI
48AQI
1st August 2025
48AQI
48AQI
2nd August 2025
47AQI
47AQI
3rd August 2025
49AQI
49AQI
4th August 2025
56AQI
56AQI
5th August 2025
62AQI
62AQI
6th August 2025
63AQI
63AQI
7th August 2025
56AQI
56AQI
8th August 2025
48AQI
48AQI
9th August 2025
53AQI
53AQI
10th August 2025
48AQI
48AQI
61AQI
44AQI
34AQI
40AQI
43AQI
44AQI
38AQI
53AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202544AQI
10
20
1
20
8
30
1
26
4
23
8
19
11
28
3
5
5
161
60
1
Highest AQI recorded in
January61AQI
Lowest AQI recorded in
March34AQI
202450AQI
9
7
11
1
22
7
25
6
29
2
10
18
14
17
21
9
31
141
98
Highest AQI recorded in
December70AQI
Lowest AQI recorded in
May38AQI
202355AQI
2
1
10
21
12
22
Highest AQI recorded in
December56AQI
Lowest AQI recorded in
November46AQI
202215AQI
3
2
1
6
Highest AQI recorded in
February21AQI
Lowest AQI recorded in
March3AQI
202130AQI
4
2
1
4
2
2
1
1
2
1
1
2
20
2
1
Highest AQI recorded in
November91AQI
Lowest AQI recorded in
March0AQI
202033AQI
1
1
2
4
1
1
8
1
1
Highest AQI recorded in
July129AQI
Lowest AQI recorded in
September2AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
55AQILeast Polluted Year Recorded
2022(Avg.)
15AQISignal Hill's annual 2025 AQI (44) shows an average percentage change of 50.2% (worsened AQI) compared to previous years: 2020 (33), 2021 (30), 2022 (15), 2023 (55), 2024 (50).
