Simi Valley, 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
Simi Valley, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
31st Oct 2021
81AQILowest AQI recorded on
23rd Oct 2023
22AQISame Day Analysis (25th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 59 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 25th Oct - 26th Oct 2025
Simi Valley, California, United States
AQI
Day
Night
.
6 AM25th Oct 2025
6 PM
5 AM26th Oct 2025
Day time
Avg. Highest Time
3PM25th Oct
61AQI
Avg. Lowest Time
11AM25th Oct
47AQI
Night time
Avg. Highest Time
6AM25th Oct
67AQI
Avg. Lowest Time
11PM25th Oct
46AQI
In the last 24 hours,
Simi Valley's AQI reached its highest point of 67 at 6 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 25th Oct and 26th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Simi Valley, California, United States
SepOct
26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th
Day
Night
26th Sep 2025276 AMAQI
26th Sep 2025307 AMAQI
26th Sep 2025338 AMAQI
26th Sep 2025379 AMAQI
26th Sep 20253310 AMAQI
26th Sep 20252311 AMAQI
26th Sep 20252212 PMAQI
26th Sep 2025231 PMAQI
26th Sep 2025242 PMAQI
26th Sep 2025283 PMAQI
26th Sep 2025324 PMAQI
26th Sep 2025355 PMAQI
26th Sep 2025396 PMAQI
26th Sep 2025397 PMAQI
26th Sep 2025378 PMAQI
26th Sep 2025349 PMAQI
26th Sep 20253310 PMAQI
26th Sep 20253111 PMAQI
27th Sep 20252612 AMAQI
27th Sep 2025181 AMAQI
27th Sep 2025172 AMAQI
27th Sep 2025193 AMAQI
27th Sep 2025174 AMAQI
27th Sep 2025165 AMAQI
21°C17/25°C
27th Sep 2025196 AMAQI
27th Sep 2025237 AMAQI
27th Sep 2025268 AMAQI
27th Sep 2025249 AMAQI
27th Sep 20252510 AMAQI
27th Sep 20251711 AMAQI
27th Sep 20251312 PMAQI
27th Sep 2025111 PMAQI
27th Sep 2025132 PMAQI
27th Sep 2025153 PMAQI
27th Sep 2025124 PMAQI
27th Sep 2025135 PMAQI
27th Sep 2025166 PMAQI
27th Sep 2025187 PMAQI
27th Sep 2025208 PMAQI
27th Sep 2025199 PMAQI
27th Sep 20251910 PMAQI
27th Sep 20252311 PMAQI
28th Sep 20252412 AMAQI
28th Sep 2025201 AMAQI
28th Sep 2025232 AMAQI
28th Sep 2025183 AMAQI
28th Sep 2025174 AMAQI
28th Sep 2025165 AMAQI
21°C17/29°C
28th Sep 2025176 AMAQI
28th Sep 2025197 AMAQI
28th Sep 2025248 AMAQI
28th Sep 2025259 AMAQI
28th Sep 20252010 AMAQI
28th Sep 20251911 AMAQI
28th Sep 20251912 PMAQI
28th Sep 2025221 PMAQI
28th Sep 2025252 PMAQI
28th Sep 2025233 PMAQI
28th Sep 2025204 PMAQI
28th Sep 2025195 PMAQI
28th Sep 2025206 PMAQI
28th Sep 2025307 PMAQI
28th Sep 2025258 PMAQI
28th Sep 2025259 PMAQI
28th Sep 20252410 PMAQI
28th Sep 20253111 PMAQI
29th Sep 20252612 AMAQI
29th Sep 2025181 AMAQI
29th Sep 2025152 AMAQI
29th Sep 2025173 AMAQI
29th Sep 2025174 AMAQI
29th Sep 2025115 AMAQI
20°C16/26°C
29th Sep 2025136 AMAQI
29th Sep 2025177 AMAQI
29th Sep 2025138 AMAQI
29th Sep 2025119 AMAQI
29th Sep 20251410 AMAQI
29th Sep 20251711 AMAQI
29th Sep 20252212 PMAQI
29th Sep 2025231 PMAQI
29th Sep 2025192 PMAQI
29th Sep 2025203 PMAQI
29th Sep 2025184 PMAQI
29th Sep 2025185 PMAQI
29th Sep 2025216 PMAQI
29th Sep 2025197 PMAQI
29th Sep 2025208 PMAQI
29th Sep 2025239 PMAQI
29th Sep 20252110 PMAQI
29th Sep 20252211 PMAQI
30th Sep 20252112 AMAQI
30th Sep 2025221 AMAQI
30th Sep 2025152 AMAQI
30th Sep 2025193 AMAQI
30th Sep 2025274 AMAQI
30th Sep 2025235 AMAQI
20°C15/29°C
30th Sep 2025256 AMAQI
30th Sep 2025247 AMAQI
30th Sep 2025258 AMAQI
30th Sep 2025299 AMAQI
30th Sep 20253710 AMAQI
30th Sep 20253511 AMAQI
30th Sep 20253212 PMAQI
30th Sep 2025311 PMAQI
30th Sep 2025282 PMAQI
30th Sep 2025193 PMAQI
30th Sep 2025254 PMAQI
30th Sep 2025315 PMAQI
30th Sep 2025306 PMAQI
30th Sep 2025297 PMAQI
30th Sep 2025308 PMAQI
30th Sep 2025309 PMAQI
30th Sep 20253410 PMAQI
30th Sep 20254211 PMAQI
1st Oct 20254112 AMAQI
1st Oct 2025411 AMAQI
1st Oct 2025432 AMAQI
1st Oct 2025443 AMAQI
1st Oct 2025364 AMAQI
1st Oct 2025395 AMAQI
21°C17/28°C
1st Oct 2025406 AMAQI
1st Oct 2025317 AMAQI
1st Oct 2025208 AMAQI
1st Oct 2025369 AMAQI
1st Oct 20253810 AMAQI
1st Oct 20254711 AMAQI
1st Oct 20255612 PMAQI
1st Oct 2025551 PMAQI
1st Oct 2025542 PMAQI
1st Oct 2025513 PMAQI
1st Oct 2025524 PMAQI
1st Oct 2025555 PMAQI
1st Oct 2025506 PMAQI
1st Oct 2025457 PMAQI
1st Oct 2025488 PMAQI
1st Oct 2025479 PMAQI
1st Oct 20255010 PMAQI
1st Oct 20252211 PMAQI
2nd Oct 20254512 AMAQI
2nd Oct 2025451 AMAQI
2nd Oct 2025382 AMAQI
2nd Oct 2025363 AMAQI
2nd Oct 2025364 AMAQI
2nd Oct 2025485 AMAQI
20°C15/29°C
2nd Oct 2025256 AMAQI
2nd Oct 2025217 AMAQI
2nd Oct 2025208 AMAQI
2nd Oct 2025319 AMAQI
2nd Oct 20254210 AMAQI
2nd Oct 20253811 AMAQI
2nd Oct 20255312 PMAQI
2nd Oct 2025401 PMAQI
2nd Oct 2025442 PMAQI
2nd Oct 2025463 PMAQI
2nd Oct 2025394 PMAQI
2nd Oct 2025315 PMAQI
2nd Oct 2025416 PMAQI
2nd Oct 2025447 PMAQI
2nd Oct 2025428 PMAQI
2nd Oct 2025429 PMAQI
2nd Oct 20253510 PMAQI
2nd Oct 20254711 PMAQI
3rd Oct 20254212 AMAQI
3rd Oct 2025301 AMAQI
3rd Oct 2025392 AMAQI
3rd Oct 2025533 AMAQI
3rd Oct 2025304 AMAQI
3rd Oct 2025425 AMAQI
21°C15/31°C
3rd Oct 2025416 AMAQI
3rd Oct 2025557 AMAQI
3rd Oct 2025458 AMAQI
3rd Oct 2025399 AMAQI
3rd Oct 20254410 AMAQI
3rd Oct 20255311 AMAQI
3rd Oct 20255112 PMAQI
3rd Oct 2025521 PMAQI
3rd Oct 2025432 PMAQI
3rd Oct 2025453 PMAQI
3rd Oct 2025474 PMAQI
3rd Oct 2025275 PMAQI
3rd Oct 2025296 PMAQI
3rd Oct 2025407 PMAQI
3rd Oct 2025398 PMAQI
3rd Oct 2025469 PMAQI
3rd Oct 20254710 PMAQI
3rd Oct 20255111 PMAQI
4th Oct 20255412 AMAQI
4th Oct 2025401 AMAQI
4th Oct 2025452 AMAQI
4th Oct 2025433 AMAQI
4th Oct 2025444 AMAQI
4th Oct 2025605 AMAQI
21°C17/28°C
4th Oct 2025406 AMAQI
4th Oct 2025407 AMAQI
4th Oct 2025508 AMAQI
4th Oct 2025249 AMAQI
4th Oct 20254710 AMAQI
4th Oct 20254611 AMAQI
4th Oct 20254012 PMAQI
4th Oct 2025431 PMAQI
4th Oct 2025312 PMAQI
4th Oct 2025253 PMAQI
4th Oct 2025314 PMAQI
4th Oct 2025505 PMAQI
4th Oct 2025386 PMAQI
4th Oct 2025407 PMAQI
4th Oct 2025388 PMAQI
4th Oct 2025549 PMAQI
4th Oct 20255210 PMAQI
4th Oct 20255411 PMAQI
5th Oct 20254012 AMAQI
5th Oct 2025371 AMAQI
5th Oct 2025392 AMAQI
5th Oct 2025383 AMAQI
5th Oct 2025404 AMAQI
5th Oct 2025625 AMAQI
20°C15/29°C
5th Oct 2025606 AMAQI
5th Oct 2025637 AMAQI
5th Oct 2025398 AMAQI
5th Oct 2025399 AMAQI
5th Oct 20255010 AMAQI
5th Oct 20255411 AMAQI
5th Oct 20255012 PMAQI
5th Oct 2025501 PMAQI
5th Oct 2025502 PMAQI
5th Oct 2025413 PMAQI
5th Oct 2025394 PMAQI
5th Oct 2025415 PMAQI
5th Oct 2025406 PMAQI
5th Oct 2025577 PMAQI
5th Oct 2025448 PMAQI
5th Oct 2025549 PMAQI
5th Oct 20255310 PMAQI
5th Oct 20255011 PMAQI
6th Oct 20255112 AMAQI
6th Oct 2025531 AMAQI
6th Oct 2025462 AMAQI
6th Oct 2025523 AMAQI
6th Oct 2025424 AMAQI
6th Oct 2025615 AMAQI
20°C14/32°C
6th Oct 2025376 AMAQI
6th Oct 2025407 AMAQI
6th Oct 2025418 AMAQI
6th Oct 2025389 AMAQI
6th Oct 20254510 AMAQI
7th Oct 2025374 AMAQI
7th Oct 2025135 AMAQI
18°C12/28°C
7th Oct 2025496 AMAQI
7th Oct 2025417 AMAQI
7th Oct 2025328 AMAQI
7th Oct 2025359 AMAQI
7th Oct 20254610 AMAQI
7th Oct 20255411 AMAQI
7th Oct 20255512 PMAQI
7th Oct 2025611 PMAQI
7th Oct 2025402 PMAQI
7th Oct 2025403 PMAQI
7th Oct 2025544 PMAQI
7th Oct 2025595 PMAQI
7th Oct 2025506 PMAQI
7th Oct 2025597 PMAQI
7th Oct 2025558 PMAQI
7th Oct 2025509 PMAQI
7th Oct 20255210 PMAQI
7th Oct 20254111 PMAQI
8th Oct 20254312 AMAQI
8th Oct 2025501 AMAQI
8th Oct 2025382 AMAQI
8th Oct 2025493 AMAQI
8th Oct 2025514 AMAQI
8th Oct 2025565 AMAQI
20°C15/29°C
8th Oct 2025506 AMAQI
8th Oct 2025517 AMAQI
8th Oct 2025408 AMAQI
8th Oct 2025439 AMAQI
8th Oct 20255010 AMAQI
8th Oct 20257011 AMAQI
8th Oct 20255412 PMAQI
8th Oct 2025481 PMAQI
8th Oct 2025462 PMAQI
8th Oct 2025393 PMAQI
8th Oct 2025594 PMAQI
8th Oct 2025515 PMAQI
8th Oct 2025516 PMAQI
8th Oct 2025557 PMAQI
8th Oct 2025428 PMAQI
8th Oct 2025489 PMAQI
8th Oct 20253710 PMAQI
8th Oct 20255411 PMAQI
9th Oct 20255212 AMAQI
9th Oct 2025381 AMAQI
9th Oct 2025562 AMAQI
9th Oct 2025523 AMAQI
9th Oct 2025504 AMAQI
9th Oct 2025475 AMAQI
18°C13/26°C
9th Oct 2025166 AMAQI
9th Oct 2025427 AMAQI
9th Oct 2025548 AMAQI
9th Oct 2025549 AMAQI
9th Oct 20254310 AMAQI
9th Oct 20256211 AMAQI
9th Oct 20256312 PMAQI
9th Oct 2025561 PMAQI
9th Oct 2025562 PMAQI
9th Oct 2025563 PMAQI
9th Oct 2025394 PMAQI
9th Oct 2025525 PMAQI
9th Oct 2025536 PMAQI
9th Oct 2025547 PMAQI
9th Oct 2025558 PMAQI
9th Oct 2025499 PMAQI
9th Oct 20253810 PMAQI
9th Oct 20254511 PMAQI
10th Oct 20254912 AMAQI
10th Oct 2025541 AMAQI
10th Oct 2025532 AMAQI
10th Oct 2025373 AMAQI
10th Oct 2025384 AMAQI
10th Oct 2025405 AMAQI
19°C11/30°C
10th Oct 2025376 AMAQI
10th Oct 2025507 AMAQI
10th Oct 2025458 AMAQI
10th Oct 2025519 AMAQI
10th Oct 20253810 AMAQI
10th Oct 20254511 AMAQI
10th Oct 20253912 PMAQI
10th Oct 2025511 PMAQI
10th Oct 2025382 PMAQI
10th Oct 2025403 PMAQI
10th Oct 2025424 PMAQI
10th Oct 2025495 PMAQI
10th Oct 2025416 PMAQI
10th Oct 2025397 PMAQI
10th Oct 2025398 PMAQI
10th Oct 2025339 PMAQI
10th Oct 20255510 PMAQI
10th Oct 20254611 PMAQI
11th Oct 20254712 AMAQI
11th Oct 2025491 AMAQI
11th Oct 2025542 AMAQI
11th Oct 2025563 AMAQI
11th Oct 2025664 AMAQI
11th Oct 2025535 AMAQI
21°C12/34°C
11th Oct 2025406 AMAQI
11th Oct 2025407 AMAQI
11th Oct 2025518 AMAQI
11th Oct 2025419 AMAQI
11th Oct 20254010 AMAQI
11th Oct 20254011 AMAQI
11th Oct 20255512 PMAQI
11th Oct 2025281 PMAQI
11th Oct 2025182 PMAQI
11th Oct 2025163 PMAQI
11th Oct 2025214 PMAQI
11th Oct 2025505 PMAQI
11th Oct 2025316 PMAQI
11th Oct 2025377 PMAQI
11th Oct 2025378 PMAQI
11th Oct 2025529 PMAQI
11th Oct 20255110 PMAQI
11th Oct 20253911 PMAQI
12th Oct 20254012 AMAQI
12th Oct 2025541 AMAQI
12th Oct 2025562 AMAQI
12th Oct 2025553 AMAQI
12th Oct 2025504 AMAQI
12th Oct 2025585 AMAQI
22°C13/31°C
12th Oct 2025516 AMAQI
12th Oct 2025417 AMAQI
12th Oct 2025418 AMAQI
12th Oct 2025419 AMAQI
12th Oct 20253810 AMAQI
12th Oct 20254111 AMAQI
12th Oct 20254412 PMAQI
12th Oct 2025331 PMAQI
12th Oct 2025272 PMAQI
12th Oct 2025283 PMAQI
12th Oct 2025364 PMAQI
12th Oct 2025345 PMAQI
12th Oct 2025446 PMAQI
12th Oct 2025307 PMAQI
12th Oct 2025288 PMAQI
12th Oct 2025519 PMAQI
12th Oct 20254110 PMAQI
12th Oct 20254011 PMAQI
13th Oct 20254712 AMAQI
13th Oct 2025511 AMAQI
13th Oct 2025552 AMAQI
13th Oct 2025543 AMAQI
13th Oct 2025464 AMAQI
13th Oct 2025535 AMAQI
22°C15/33°C
13th Oct 2025566 AMAQI
13th Oct 2025547 AMAQI
13th Oct 2025508 AMAQI
13th Oct 2025409 AMAQI
13th Oct 20254010 AMAQI
13th Oct 20255011 AMAQI
13th Oct 20255612 PMAQI
13th Oct 2025561 PMAQI
13th Oct 2025542 PMAQI
13th Oct 2025543 PMAQI
13th Oct 2025594 PMAQI
13th Oct 2025585 PMAQI
13th Oct 2025586 PMAQI
13th Oct 2025597 PMAQI
13th Oct 2025548 PMAQI
13th Oct 2025559 PMAQI
13th Oct 20255610 PMAQI
13th Oct 20256011 PMAQI
14th Oct 20255612 AMAQI
14th Oct 2025421 AMAQI
14th Oct 2025402 AMAQI
14th Oct 2025403 AMAQI
14th Oct 2025454 AMAQI
14th Oct 2025545 AMAQI
17°C14/22°C
14th Oct 2025506 AMAQI
14th Oct 2025507 AMAQI
14th Oct 2025268 AMAQI
14th Oct 2025259 AMAQI
14th Oct 20253110 AMAQI
14th Oct 20253611 AMAQI
14th Oct 20253612 PMAQI
14th Oct 2025381 PMAQI
14th Oct 2025472 PMAQI
14th Oct 2025313 PMAQI
14th Oct 2025364 PMAQI
14th Oct 2025315 PMAQI
14th Oct 2025346 PMAQI
14th Oct 2025217 PMAQI
14th Oct 2025248 PMAQI
14th Oct 2025349 PMAQI
14th Oct 20251410 PMAQI
14th Oct 2025911 PMAQI
15th Oct 20251712 AMAQI
15th Oct 2025251 AMAQI
15th Oct 2025252 AMAQI
15th Oct 2025233 AMAQI
15th Oct 2025364 AMAQI
15th Oct 2025415 AMAQI
14°C12/17°C
15th Oct 2025396 AMAQI
15th Oct 2025287 AMAQI
15th Oct 2025368 AMAQI
15th Oct 2025209 AMAQI
15th Oct 20252110 AMAQI
15th Oct 20253411 AMAQI
15th Oct 20253912 PMAQI
15th Oct 2025181 PMAQI
15th Oct 2025392 PMAQI
15th Oct 2025393 PMAQI
15th Oct 2025364 PMAQI
15th Oct 2025195 PMAQI
15th Oct 2025216 PMAQI
15th Oct 2025157 PMAQI
15th Oct 2025378 PMAQI
15th Oct 2025399 PMAQI
15th Oct 20253910 PMAQI
15th Oct 20255511 PMAQI
16th Oct 20255012 AMAQI
16th Oct 2025581 AMAQI
16th Oct 2025552 AMAQI
16th Oct 2025363 AMAQI
16th Oct 2025354 AMAQI
16th Oct 2025325 AMAQI
14°C10/20°C
16th Oct 2025326 AMAQI
16th Oct 2025467 AMAQI
16th Oct 2025408 AMAQI
16th Oct 2025409 AMAQI
16th Oct 20255110 AMAQI
16th Oct 20254711 AMAQI
16th Oct 20252712 PMAQI
16th Oct 2025241 PMAQI
16th Oct 2025272 PMAQI
16th Oct 2025233 PMAQI
16th Oct 2025304 PMAQI
16th Oct 2025365 PMAQI
16th Oct 2025366 PMAQI
16th Oct 2025397 PMAQI
16th Oct 2025408 PMAQI
16th Oct 2025399 PMAQI
16th Oct 20255110 PMAQI
16th Oct 20255211 PMAQI
17th Oct 20255012 AMAQI
17th Oct 2025551 AMAQI
17th Oct 2025562 AMAQI
17th Oct 2025453 AMAQI
17th Oct 2025384 AMAQI
17th Oct 2025365 AMAQI
19°C12/30°C
17th Oct 2025386 AMAQI
17th Oct 2025377 AMAQI
17th Oct 2025398 AMAQI
17th Oct 2025459 AMAQI
17th Oct 20254710 AMAQI
17th Oct 20254911 AMAQI
17th Oct 20254912 PMAQI
17th Oct 2025341 PMAQI
17th Oct 2025242 PMAQI
17th Oct 2025313 PMAQI
17th Oct 2025224 PMAQI
17th Oct 2025205 PMAQI
17th Oct 2025216 PMAQI
17th Oct 2025347 PMAQI
17th Oct 2025528 PMAQI
17th Oct 2025539 PMAQI
17th Oct 20254710 PMAQI
17th Oct 20255011 PMAQI
18th Oct 20255412 AMAQI
18th Oct 2025551 AMAQI
18th Oct 2025632 AMAQI
18th Oct 2025553 AMAQI
18th Oct 2025454 AMAQI
18th Oct 2025385 AMAQI
22°C16/32°C
18th Oct 2025376 AMAQI
18th Oct 2025467 AMAQI
18th Oct 2025508 AMAQI
18th Oct 2025509 AMAQI
18th Oct 20255810 AMAQI
18th Oct 20255411 AMAQI
18th Oct 20255412 PMAQI
18th Oct 2025541 PMAQI
18th Oct 2025242 PMAQI
18th Oct 2025193 PMAQI
18th Oct 2025304 PMAQI
18th Oct 2025255 PMAQI
18th Oct 2025276 PMAQI
18th Oct 2025227 PMAQI
18th Oct 2025218 PMAQI
18th Oct 2025189 PMAQI
18th Oct 20254610 PMAQI
18th Oct 20254911 PMAQI
19th Oct 20255012 AMAQI
19th Oct 2025501 AMAQI
19th Oct 2025552 AMAQI
19th Oct 2025523 AMAQI
19th Oct 2025714 AMAQI
19th Oct 2025625 AMAQI
23°C16/33°C
19th Oct 2025606 AMAQI
19th Oct 2025387 AMAQI
19th Oct 2025438 AMAQI
19th Oct 2025509 AMAQI
19th Oct 20255610 AMAQI
19th Oct 20255111 AMAQI
19th Oct 20254512 PMAQI
19th Oct 2025261 PMAQI
19th Oct 2025152 PMAQI
19th Oct 2025183 PMAQI
19th Oct 2025534 PMAQI
19th Oct 2025445 PMAQI
19th Oct 2025186 PMAQI
19th Oct 2025147 PMAQI
19th Oct 2025138 PMAQI
19th Oct 2025179 PMAQI
19th Oct 20253810 PMAQI
19th Oct 20255811 PMAQI
20th Oct 20255612 AMAQI
20th Oct 2025591 AMAQI
20th Oct 2025622 AMAQI
20th Oct 2025573 AMAQI
20th Oct 2025534 AMAQI
20th Oct 2025515 AMAQI
22°C16/31°C
20th Oct 2025496 AMAQI
20th Oct 2025497 AMAQI
20th Oct 2025498 AMAQI
20th Oct 2025559 AMAQI
20th Oct 20255510 AMAQI
20th Oct 20256011 AMAQI
20th Oct 20256112 PMAQI
20th Oct 2025331 PMAQI
20th Oct 2025152 PMAQI
20th Oct 2025303 PMAQI
20th Oct 2025214 PMAQI
20th Oct 2025395 PMAQI
20th Oct 2025576 PMAQI
20th Oct 2025477 PMAQI
20th Oct 2025368 PMAQI
20th Oct 2025609 PMAQI
20th Oct 20256210 PMAQI
20th Oct 20255711 PMAQI
21st Oct 20255712 AMAQI
21st Oct 2025621 AMAQI
21st Oct 2025642 AMAQI
21st Oct 2025593 AMAQI
21st Oct 2025584 AMAQI
21st Oct 2025605 AMAQI
21°C15/32°C
21st Oct 2025576 AMAQI
21st Oct 2025517 AMAQI
21st Oct 2025488 AMAQI
21st Oct 2025519 AMAQI
21st Oct 20255510 AMAQI
21st Oct 20255711 AMAQI
21st Oct 20255112 PMAQI
21st Oct 2025361 PMAQI
21st Oct 2025292 PMAQI
21st Oct 2025233 PMAQI
21st Oct 2025314 PMAQI
21st Oct 2025445 PMAQI
21st Oct 2025506 PMAQI
21st Oct 2025567 PMAQI
21st Oct 2025508 PMAQI
21st Oct 2025489 PMAQI
21st Oct 20255410 PMAQI
21st Oct 20255511 PMAQI
22nd Oct 20255712 AMAQI
22nd Oct 2025551 AMAQI
22nd Oct 2025562 AMAQI
22nd Oct 2025533 AMAQI
22nd Oct 2025494 AMAQI
22nd Oct 2025505 AMAQI
17°C11/23°C
22nd Oct 2025486 AMAQI
22nd Oct 2025407 AMAQI
22nd Oct 2025318 AMAQI
22nd Oct 2025239 AMAQI
22nd Oct 20253210 AMAQI
22nd Oct 20254711 AMAQI
22nd Oct 20254212 PMAQI
22nd Oct 2025471 PMAQI
22nd Oct 2025542 PMAQI
22nd Oct 2025483 PMAQI
22nd Oct 2025364 PMAQI
22nd Oct 2025285 PMAQI
22nd Oct 2025266 PMAQI
22nd Oct 2025227 PMAQI
22nd Oct 2025288 PMAQI
22nd Oct 2025339 PMAQI
22nd Oct 20253310 PMAQI
22nd Oct 20253711 PMAQI
23rd Oct 20253812 AMAQI
23rd Oct 2025331 AMAQI
23rd Oct 2025332 AMAQI
23rd Oct 2025283 AMAQI
23rd Oct 2025204 AMAQI
23rd Oct 2025175 AMAQI
18°C13/25°C
23rd Oct 2025236 AMAQI
23rd Oct 2025367 AMAQI
23rd Oct 2025368 AMAQI
23rd Oct 2025389 AMAQI
23rd Oct 20254210 AMAQI
23rd Oct 20254611 AMAQI
23rd Oct 20255412 PMAQI
23rd Oct 2025501 PMAQI
23rd Oct 2025332 PMAQI
23rd Oct 2025223 PMAQI
23rd Oct 2025284 PMAQI
23rd Oct 2025335 PMAQI
23rd Oct 2025426 PMAQI
23rd Oct 2025527 PMAQI
23rd Oct 2025478 PMAQI
23rd Oct 2025489 PMAQI
23rd Oct 20255510 PMAQI
23rd Oct 20255311 PMAQI
24th Oct 20255412 AMAQI
24th Oct 2025541 AMAQI
24th Oct 2025502 AMAQI
24th Oct 2025503 AMAQI
24th Oct 2025554 AMAQI
24th Oct 2025475 AMAQI
18°C13/27°C
24th Oct 2025366 AMAQI
24th Oct 2025307 AMAQI
24th Oct 2025308 AMAQI
24th Oct 2025309 AMAQI
24th Oct 20253910 AMAQI
24th Oct 20254711 AMAQI
24th Oct 20254712 PMAQI
24th Oct 2025501 PMAQI
24th Oct 2025442 PMAQI
24th Oct 2025393 PMAQI
24th Oct 2025444 PMAQI
24th Oct 2025535 PMAQI
24th Oct 2025606 PMAQI
24th Oct 2025607 PMAQI
24th Oct 2025608 PMAQI
24th Oct 2025589 PMAQI
24th Oct 20255910 PMAQI
24th Oct 20256411 PMAQI
25th Oct 20255812 AMAQI
25th Oct 2025591 AMAQI
25th Oct 2025592 AMAQI
25th Oct 2025603 AMAQI
25th Oct 2025684 AMAQI
25th Oct 2025755 AMAQI
19°C12/28°C
25th Oct 2025676 AMAQI
25th Oct 2025577 AMAQI
25th Oct 2025558 AMAQI
25th Oct 2025569 AMAQI
25th Oct 20255310 AMAQI
25th Oct 20254711 AMAQI
25th Oct 20255012 PMAQI
25th Oct 2025561 PMAQI
25th Oct 2025592 PMAQI
25th Oct 2025613 PMAQI
25th Oct 2025574 PMAQI
25th Oct 2025575 PMAQI
25th Oct 2025586 PMAQI
25th Oct 2025537 PMAQI
25th Oct 2025528 PMAQI
25th Oct 2025539 PMAQI
25th Oct 20254610 PMAQI
25th Oct 20254611 PMAQI
26th Oct 20255612 AMAQI
16°C12/24°C
6 AM
12 PM
6 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 12 PM
44AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
3 PM
33AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 12 PM (Avg. 44), while the lowest AQI was between 3 PM to 3 PM (Avg. 33).
Night time
Avg. Highest Time
12 AM - 5 AM
43AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
7 PM - 8 PM
39AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 43), while the lowest AQI was between 7 PM to 8 PM (Avg. 39).
2025 Days Vs Air Quality
Simi Valley, California, United States
2025
86%
255
14%
43
Total number of days with different AQI categories in last 299 days in 2025 (66 days remaining)
Good
255 DaysModerate
43 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 299 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
Simi Valley, 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
46AQI
46AQI
2nd January 2025
35AQI
35AQI
3rd January 2025
47AQI
47AQI
4th January 2025
38AQI
38AQI
5th January 2025
29AQI
29AQI
6th January 2025
29AQI
29AQI
7th January 2025
37AQI
37AQI
8th January 2025
56AQI
56AQI
9th January 2025
35AQI
35AQI
10th January 2025
40AQI
40AQI
11th January 2025
40AQI
40AQI
12th January 2025
30AQI
30AQI
13th January 2025
32AQI
32AQI
14th January 2025
30AQI
30AQI
15th January 2025
30AQI
30AQI
16th January 2025
29AQI
29AQI
17th January 2025
38AQI
38AQI
18th January 2025
49AQI
49AQI
19th January 2025
57AQI
57AQI
20th January 2025
50AQI
50AQI
21st January 2025
32AQI
32AQI
22nd January 2025
36AQI
36AQI
23rd January 2025
36AQI
36AQI
24th January 2025
32AQI
32AQI
25th January 2025
46AQI
46AQI
26th January 2025
27AQI
27AQI
27th January 2025
27AQI
27AQI
28th January 2025
34AQI
34AQI
29th January 2025
47AQI
47AQI
30th January 2025
49AQI
49AQI
31st January 2025
50AQI
50AQI
1st February 2025
43AQI
43AQI
2nd February 2025
44AQI
44AQI
3rd February 2025
44AQI
44AQI
4th February 2025
28AQI
28AQI
5th February 2025
22AQI
22AQI
6th February 2025
23AQI
23AQI
7th February 2025
26AQI
26AQI
8th February 2025
28AQI
28AQI
9th February 2025
30AQI
30AQI
10th February 2025
34AQI
34AQI
11th February 2025
32AQI
32AQI
12th February 2025
30AQI
30AQI
13th February 2025
25AQI
25AQI
14th February 2025
30AQI
30AQI
15th February 2025
33AQI
33AQI
16th February 2025
31AQI
31AQI
17th February 2025
35AQI
35AQI
18th February 2025
34AQI
34AQI
19th February 2025
33AQI
33AQI
20th February 2025
35AQI
35AQI
21st February 2025
30AQI
30AQI
22nd February 2025
30AQI
30AQI
23rd February 2025
33AQI
33AQI
24th February 2025
36AQI
36AQI
25th February 2025
35AQI
35AQI
26th February 2025
34AQI
34AQI
27th February 2025
29AQI
29AQI
28th February 2025
30AQI
30AQI
1st March 2025
36AQI
36AQI
2nd March 2025
38AQI
38AQI
3rd March 2025
26AQI
26AQI
4th March 2025
31AQI
31AQI
5th March 2025
35AQI
35AQI
6th March 2025
30AQI
30AQI
7th March 2025
27AQI
27AQI
8th March 2025
31AQI
31AQI
9th March 2025
34AQI
34AQI
10th March 2025
32AQI
32AQI
11th March 2025
29AQI
29AQI
12th March 2025
27AQI
27AQI
13th March 2025
22AQI
22AQI
14th March 2025
19AQI
19AQI
15th March 2025
22AQI
22AQI
16th March 2025
33AQI
33AQI
17th March 2025
31AQI
31AQI
18th March 2025
19AQI
19AQI
19th March 2025
19AQI
19AQI
20th March 2025
20AQI
20AQI
21st March 2025
22AQI
22AQI
22nd March 2025
28AQI
28AQI
23rd March 2025
40AQI
40AQI
24th March 2025
33AQI
33AQI
25th March 2025
37AQI
37AQI
26th March 2025
29AQI
29AQI
27th March 2025
23AQI
23AQI
28th March 2025
31AQI
31AQI
29th March 2025
33AQI
33AQI
30th March 2025
31AQI
31AQI
31st March 2025
18AQI
18AQI
1st April 2025
25AQI
25AQI
2nd April 2025
22AQI
22AQI
3rd April 2025
30AQI
30AQI
4th April 2025
27AQI
27AQI
5th April 2025
18AQI
18AQI
6th April 2025
24AQI
24AQI
7th April 2025
31AQI
31AQI
8th April 2025
41AQI
41AQI
9th April 2025
41AQI
41AQI
10th April 2025
48AQI
48AQI
11th April 2025
46AQI
46AQI
12th April 2025
53AQI
53AQI
13th April 2025
57AQI
57AQI
14th April 2025
53AQI
53AQI
15th April 2025
50AQI
50AQI
16th April 2025
36AQI
36AQI
17th April 2025
30AQI
30AQI
18th April 2025
31AQI
31AQI
19th April 2025
33AQI
33AQI
20th April 2025
32AQI
32AQI
21st April 2025
44AQI
44AQI
22nd April 2025
55AQI
55AQI
23rd April 2025
48AQI
48AQI
24th April 2025
42AQI
42AQI
25th April 2025
42AQI
42AQI
26th April 2025
19AQI
19AQI
27th April 2025
19AQI
19AQI
28th April 2025
26AQI
26AQI
29th April 2025
31AQI
31AQI
30th April 2025
54AQI
54AQI
1st May 2025
50AQI
50AQI
2nd May 2025
44AQI
44AQI
3rd May 2025
42AQI
42AQI
4th May 2025
34AQI
34AQI
5th May 2025
45AQI
45AQI
6th May 2025
43AQI
43AQI
7th May 2025
36AQI
36AQI
8th May 2025
43AQI
43AQI
9th May 2025
41AQI
41AQI
10th May 2025
39AQI
39AQI
11th May 2025
35AQI
35AQI
12th May 2025
46AQI
46AQI
13th May 2025
24AQI
24AQI
14th May 2025
27AQI
27AQI
15th May 2025
46AQI
46AQI
16th May 2025
53AQI
53AQI
17th May 2025
47AQI
47AQI
18th May 2025
32AQI
32AQI
19th May 2025
38AQI
38AQI
20th May 2025
41AQI
41AQI
21st May 2025
39AQI
39AQI
22nd May 2025
53AQI
53AQI
23rd May 2025
54AQI
54AQI
24th May 2025
53AQI
53AQI
25th May 2025
48AQI
48AQI
26th May 2025
44AQI
44AQI
27th May 2025
45AQI
45AQI
28th May 2025
43AQI
43AQI
29th May 2025
44AQI
44AQI
30th May 2025
45AQI
45AQI
31st May 2025
47AQI
47AQI
1st June 2025
42AQI
42AQI
2nd June 2025
36AQI
36AQI
3rd June 2025
31AQI
31AQI
4th June 2025
29AQI
29AQI
5th June 2025
40AQI
40AQI
6th June 2025
34AQI
34AQI
7th June 2025
38AQI
38AQI
8th June 2025
33AQI
33AQI
9th June 2025
44AQI
44AQI
10th June 2025
45AQI
45AQI
11th June 2025
37AQI
37AQI
12th June 2025
51AQI
51AQI
13th June 2025
52AQI
52AQI
14th June 2025
50AQI
50AQI
15th June 2025
51AQI
51AQI
16th June 2025
55AQI
55AQI
17th June 2025
57AQI
57AQI
18th June 2025
56AQI
56AQI
19th June 2025
55AQI
55AQI
20th June 2025
55AQI
55AQI
21st June 2025
58AQI
58AQI
22nd June 2025
58AQI
58AQI
23rd June 2025
53AQI
53AQI
24th June 2025
49AQI
49AQI
25th June 2025
44AQI
44AQI
26th June 2025
46AQI
46AQI
27th June 2025
51AQI
51AQI
28th June 2025
46AQI
46AQI
29th June 2025
37AQI
37AQI
30th June 2025
32AQI
32AQI
1st July 2025
34AQI
34AQI
2nd July 2025
40AQI
40AQI
3rd July 2025
40AQI
40AQI
4th July 2025
47AQI
47AQI
5th July 2025
68AQI
68AQI
6th July 2025
52AQI
52AQI
7th July 2025
44AQI
44AQI
8th July 2025
39AQI
39AQI
9th July 2025
35AQI
35AQI
10th July 2025
37AQI
37AQI
11th July 2025
48AQI
48AQI
12th July 2025
54AQI
54AQI
13th July 2025
45AQI
45AQI
14th July 2025
34AQI
34AQI
15th July 2025
37AQI
37AQI
16th July 2025
36AQI
36AQI
17th July 2025
25AQI
25AQI
18th July 2025
26AQI
26AQI
19th July 2025
34AQI
34AQI
20th July 2025
43AQI
43AQI
21st July 2025
32AQI
32AQI
22nd July 2025
25AQI
25AQI
23rd July 2025
22AQI
22AQI
24th July 2025
18AQI
18AQI
25th July 2025
18AQI
18AQI
26th July 2025
21AQI
21AQI
27th July 2025
22AQI
22AQI
28th July 2025
22AQI
22AQI
29th July 2025
25AQI
25AQI
30th July 2025
27AQI
27AQI
31st July 2025
39AQI
39AQI
1st August 2025
41AQI
41AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
48AQI
48AQI
4th August 2025
58AQI
58AQI
5th August 2025
65AQI
65AQI
6th August 2025
62AQI
62AQI
7th August 2025
57AQI
57AQI
8th August 2025
58AQI
58AQI
9th August 2025
53AQI
53AQI
10th August 2025
53AQI
53AQI
11th August 2025
49AQI
49AQI
12th August 2025
55AQI
55AQI
13th August 2025
55AQI
55AQI
14th August 2025
55AQI
55AQI
15th August 2025
49AQI
49AQI
16th August 2025
44AQI
44AQI
17th August 2025
40AQI
40AQI
18th August 2025
41AQI
41AQI
19th August 2025
34AQI
34AQI
20th August 2025
36AQI
36AQI
21st August 2025
45AQI
45AQI
22nd August 2025
49AQI
49AQI
23rd August 2025
47AQI
47AQI
24th August 2025
52AQI
52AQI
25th August 2025
41AQI
41AQI
26th August 2025
48AQI
48AQI
27th August 2025
44AQI
44AQI
28th August 2025
42AQI
42AQI
29th August 2025
38AQI
38AQI
30th August 2025
44AQI
44AQI
31st August 2025
46AQI
46AQI
1st September 2025
39AQI
39AQI
2nd September 2025
36AQI
36AQI
3rd September 2025
45AQI
45AQI
4th September 2025
36AQI
36AQI
5th September 2025
38AQI
38AQI
6th September 2025
44AQI
44AQI
7th September 2025
33AQI
33AQI
8th September 2025
26AQI
26AQI
9th September 2025
25AQI
25AQI
10th September 2025
23AQI
23AQI
11th September 2025
23AQI
23AQI
12th September 2025
33AQI
33AQI
13th September 2025
44AQI
44AQI
14th September 2025
51AQI
51AQI
15th September 2025
51AQI
51AQI
16th September 2025
48AQI
48AQI
17th September 2025
29AQI
29AQI
18th September 2025
29AQI
29AQI
19th September 2025
34AQI
34AQI
20th September 2025
29AQI
29AQI
21st September 2025
26AQI
26AQI
22nd September 2025
28AQI
28AQI
23rd September 2025
29AQI
29AQI
24th September 2025
34AQI
34AQI
25th September 2025
26AQI
26AQI
26th September 2025
32AQI
32AQI
27th September 2025
18AQI
18AQI
28th September 2025
22AQI
22AQI
29th September 2025
18AQI
18AQI
30th September 2025
28AQI
28AQI
1st October 2025
43AQI
43AQI
2nd October 2025
39AQI
39AQI
3rd October 2025
42AQI
42AQI
4th October 2025
44AQI
44AQI
5th October 2025
45AQI
45AQI
6th October 2025
50AQI
50AQI
7th October 2025
47AQI
47AQI
8th October 2025
49AQI
49AQI
9th October 2025
50AQI
50AQI
10th October 2025
44AQI
44AQI
11th October 2025
44AQI
44AQI
12th October 2025
43AQI
43AQI
13th October 2025
53AQI
53AQI
14th October 2025
35AQI
35AQI
15th October 2025
29AQI
29AQI
16th October 2025
42AQI
42AQI
17th October 2025
43AQI
43AQI
18th October 2025
43AQI
43AQI
19th October 2025
42AQI
42AQI
20th October 2025
52AQI
52AQI
21st October 2025
53AQI
53AQI
22nd October 2025
41AQI
41AQI
23rd October 2025
38AQI
38AQI
24th October 2025
50AQI
50AQI
25th October 2025
59AQI
59AQI
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
38AQI
32AQI
29AQI
37AQI
43AQI
46AQI
35AQI
48AQI
33AQI
45AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202538AQI
29
2
28
31
25
5
27
4
18
12
28
3
20
11
28
2
21
4
255
43
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
March29AQI
202438AQI
30
1
29
30
1
25
5
20
11
25
4
28
3
30
1
30
26
5
26
4
26
5
325
40
Highest AQI recorded in
May46AQI
Lowest AQI recorded in
February28AQI
202336AQI
30
28
31
29
1
27
4
30
21
9
1
29
2
24
6
30
1
27
2
31
337
25
1
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
January30AQI
202238AQI
28
2
22
31
24
6
23
8
20
10
20
2
1
1
24
5
26
5
28
2
31
278
41
Highest AQI recorded in
June47AQI
Lowest AQI recorded in
December29AQI
202141AQI
29
1
25
3
30
1
25
5
25
6
25
5
19
12
22
9
21
9
29
2
21
8
1
26
5
297
66
1
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
January32AQI
202041AQI
13
20
18
30
25
6
23
8
9
21
16
14
28
2
30
1
212
52
Highest AQI recorded in
September58AQI
Lowest AQI recorded in
March28AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2021(Avg.)
41AQILeast Polluted Year Recorded
2023(Avg.)
36AQISimi Valley's annual 2025 AQI (38) shows an average percentage change of -0.8% (improved AQI) compared to previous years: 2020 (41), 2021 (41), 2022 (38), 2023 (36), 2024 (38).
