Vacaville, 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
Vacaville, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
16th Oct 2025
59AQILowest AQI recorded on
12th Oct 2023
4AQISame Day Analysis (30th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 43 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 30th Oct - 31st Oct 2025
Vacaville, California, United States
AQI
Day
Night
.
7 AM30th Oct 2025
6 PM
6 AM31st Oct 2025
Day time
Avg. Highest Time
6PM30th Oct
62AQI
Avg. Lowest Time
4PM30th Oct
24AQI
Night time
Avg. Highest Time
7PM30th Oct
63AQI
Avg. Lowest Time
9PM30th Oct
33AQI
In the last 24 hours,
Vacaville's AQI reached its highest point of 63 at 7 PM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 30th Oct and 31st Oct 2025.
Day & Night AQI Trend : Oct 2025
Vacaville, California, United States
Oct
01st - 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 - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st
Day
Night
1st Oct 2025237 AMAQI
1st Oct 2025228 AMAQI
1st Oct 2025529 AMAQI
1st Oct 20254910 AMAQI
1st Oct 20254011 AMAQI
1st Oct 20254212 PMAQI
1st Oct 2025501 PMAQI
1st Oct 2025492 PMAQI
1st Oct 2025463 PMAQI
1st Oct 2025464 PMAQI
1st Oct 2025465 PMAQI
1st Oct 2025486 PMAQI
1st Oct 2025497 PMAQI
1st Oct 2025388 PMAQI
1st Oct 2025359 PMAQI
1st Oct 20254010 PMAQI
1st Oct 20254611 PMAQI
2nd Oct 20254212 AMAQI
2nd Oct 2025461 AMAQI
2nd Oct 2025392 AMAQI
2nd Oct 2025353 AMAQI
2nd Oct 2025394 AMAQI
2nd Oct 2025515 AMAQI
2nd Oct 2025536 AMAQI
20°C17/24°C
2nd Oct 2025537 AMAQI
2nd Oct 2025418 AMAQI
2nd Oct 2025359 AMAQI
2nd Oct 20251710 AMAQI
2nd Oct 20251311 AMAQI
2nd Oct 20254012 PMAQI
2nd Oct 2025471 PMAQI
2nd Oct 2025522 PMAQI
2nd Oct 2025393 PMAQI
2nd Oct 2025474 PMAQI
2nd Oct 2025545 PMAQI
2nd Oct 2025566 PMAQI
2nd Oct 2025577 PMAQI
2nd Oct 2025548 PMAQI
2nd Oct 2025519 PMAQI
2nd Oct 20254310 PMAQI
2nd Oct 20255111 PMAQI
3rd Oct 20254712 AMAQI
3rd Oct 2025501 AMAQI
3rd Oct 2025562 AMAQI
3rd Oct 2025563 AMAQI
3rd Oct 2025434 AMAQI
3rd Oct 2025435 AMAQI
3rd Oct 2025536 AMAQI
20°C16/25°C
3rd Oct 2025547 AMAQI
3rd Oct 2025508 AMAQI
3rd Oct 2025569 AMAQI
3rd Oct 20256010 AMAQI
3rd Oct 20253811 AMAQI
3rd Oct 20254312 PMAQI
3rd Oct 2025441 PMAQI
3rd Oct 2025372 PMAQI
3rd Oct 2025403 PMAQI
3rd Oct 2025404 PMAQI
3rd Oct 2025505 PMAQI
3rd Oct 2025566 PMAQI
3rd Oct 2025557 PMAQI
3rd Oct 2025548 PMAQI
3rd Oct 2025559 PMAQI
3rd Oct 20255410 PMAQI
3rd Oct 20254711 PMAQI
4th Oct 20254912 AMAQI
4th Oct 2025431 AMAQI
4th Oct 2025432 AMAQI
4th Oct 2025563 AMAQI
4th Oct 2025564 AMAQI
4th Oct 2025615 AMAQI
4th Oct 2025566 AMAQI
19°C14/26°C
4th Oct 2025467 AMAQI
4th Oct 2025398 AMAQI
4th Oct 2025569 AMAQI
4th Oct 20255010 AMAQI
4th Oct 20254511 AMAQI
4th Oct 20255412 PMAQI
4th Oct 2025451 PMAQI
4th Oct 2025452 PMAQI
4th Oct 2025393 PMAQI
4th Oct 2025504 PMAQI
4th Oct 2025535 PMAQI
4th Oct 2025476 PMAQI
4th Oct 2025527 PMAQI
4th Oct 2025198 PMAQI
4th Oct 2025539 PMAQI
4th Oct 20255810 PMAQI
4th Oct 20255311 PMAQI
5th Oct 20255412 AMAQI
5th Oct 2025581 AMAQI
5th Oct 2025562 AMAQI
5th Oct 2025433 AMAQI
5th Oct 2025464 AMAQI
5th Oct 2025445 AMAQI
5th Oct 2025486 AMAQI
20°C11/30°C
5th Oct 2025547 AMAQI
5th Oct 2025378 AMAQI
5th Oct 2025479 AMAQI
5th Oct 20255510 AMAQI
5th Oct 20255611 AMAQI
5th Oct 20255912 PMAQI
5th Oct 2025541 PMAQI
5th Oct 2025562 PMAQI
5th Oct 2025543 PMAQI
5th Oct 2025594 PMAQI
5th Oct 2025395 PMAQI
5th Oct 2025456 PMAQI
5th Oct 2025537 PMAQI
5th Oct 2025548 PMAQI
5th Oct 2025559 PMAQI
5th Oct 20254410 PMAQI
5th Oct 20255811 PMAQI
6th Oct 20255812 AMAQI
6th Oct 2025421 AMAQI
6th Oct 2025412 AMAQI
6th Oct 2025413 AMAQI
6th Oct 2025524 AMAQI
6th Oct 2025715 AMAQI
6th Oct 2025456 AMAQI
20°C12/30°C
6th Oct 2025457 AMAQI
6th Oct 2025408 AMAQI
6th Oct 2025659 AMAQI
6th Oct 20252410 AMAQI
7th Oct 2025354 AMAQI
7th Oct 2025265 AMAQI
7th Oct 2025456 AMAQI
23°C14/33°C
7th Oct 2025507 AMAQI
7th Oct 2025508 AMAQI
7th Oct 2025559 AMAQI
7th Oct 20255010 AMAQI
7th Oct 20254611 AMAQI
7th Oct 20255312 PMAQI
7th Oct 2025561 PMAQI
7th Oct 2025482 PMAQI
7th Oct 2025443 PMAQI
7th Oct 2025454 PMAQI
7th Oct 2025255 PMAQI
7th Oct 2025496 PMAQI
7th Oct 2025517 PMAQI
7th Oct 2025498 PMAQI
7th Oct 2025569 PMAQI
7th Oct 20256110 PMAQI
7th Oct 20255311 PMAQI
8th Oct 20254012 AMAQI
8th Oct 2025511 AMAQI
8th Oct 2025532 AMAQI
8th Oct 2025523 AMAQI
8th Oct 2025534 AMAQI
8th Oct 2025585 AMAQI
8th Oct 2025476 AMAQI
24°C14/34°C
8th Oct 2025507 AMAQI
8th Oct 2025468 AMAQI
8th Oct 2025629 AMAQI
8th Oct 20254610 AMAQI
8th Oct 20254511 AMAQI
8th Oct 20255412 PMAQI
8th Oct 2025561 PMAQI
8th Oct 2025562 PMAQI
8th Oct 2025603 PMAQI
8th Oct 2025574 PMAQI
8th Oct 2025585 PMAQI
8th Oct 2025596 PMAQI
8th Oct 2025507 PMAQI
8th Oct 2025558 PMAQI
8th Oct 2025469 PMAQI
8th Oct 20255910 PMAQI
8th Oct 20256111 PMAQI
9th Oct 20256412 AMAQI
9th Oct 2025511 AMAQI
9th Oct 2025472 AMAQI
9th Oct 2025423 AMAQI
9th Oct 2025404 AMAQI
9th Oct 2025475 AMAQI
9th Oct 2025556 AMAQI
19°C14/27°C
9th Oct 2025587 AMAQI
9th Oct 2025608 AMAQI
9th Oct 2025589 AMAQI
9th Oct 20256810 AMAQI
9th Oct 20255811 AMAQI
9th Oct 20255712 PMAQI
9th Oct 2025421 PMAQI
9th Oct 2025562 PMAQI
9th Oct 2025583 PMAQI
9th Oct 2025574 PMAQI
9th Oct 2025425 PMAQI
9th Oct 2025446 PMAQI
9th Oct 2025507 PMAQI
9th Oct 2025518 PMAQI
9th Oct 2025429 PMAQI
9th Oct 20254010 PMAQI
9th Oct 20253911 PMAQI
10th Oct 20253812 AMAQI
10th Oct 2025461 AMAQI
10th Oct 2025492 AMAQI
10th Oct 2025523 AMAQI
10th Oct 2025554 AMAQI
10th Oct 2025565 AMAQI
10th Oct 2025436 AMAQI
18°C14/24°C
10th Oct 2025507 AMAQI
10th Oct 2025428 AMAQI
10th Oct 2025539 AMAQI
10th Oct 20254710 AMAQI
10th Oct 20254711 AMAQI
10th Oct 20255512 PMAQI
10th Oct 2025541 PMAQI
10th Oct 2025532 PMAQI
10th Oct 2025513 PMAQI
10th Oct 2025564 PMAQI
10th Oct 2025495 PMAQI
10th Oct 2025446 PMAQI
10th Oct 2025347 PMAQI
10th Oct 2025328 PMAQI
10th Oct 2025409 PMAQI
10th Oct 20254610 PMAQI
10th Oct 20255711 PMAQI
11th Oct 20256012 AMAQI
11th Oct 2025461 AMAQI
11th Oct 2025442 AMAQI
11th Oct 2025533 AMAQI
11th Oct 2025534 AMAQI
11th Oct 2025445 AMAQI
11th Oct 2025246 AMAQI
19°C12/26°C
11th Oct 2025427 AMAQI
11th Oct 2025528 AMAQI
11th Oct 2025399 AMAQI
11th Oct 20253810 AMAQI
11th Oct 20251511 AMAQI
11th Oct 20251412 PMAQI
11th Oct 2025121 PMAQI
11th Oct 2025472 PMAQI
11th Oct 2025113 PMAQI
11th Oct 2025124 PMAQI
11th Oct 2025415 PMAQI
11th Oct 2025566 PMAQI
11th Oct 2025557 PMAQI
11th Oct 2025208 PMAQI
11th Oct 2025239 PMAQI
11th Oct 20253710 PMAQI
11th Oct 20255511 PMAQI
12th Oct 20255212 AMAQI
12th Oct 2025491 AMAQI
12th Oct 2025482 AMAQI
12th Oct 2025543 AMAQI
12th Oct 2025534 AMAQI
12th Oct 2025595 AMAQI
12th Oct 2025586 AMAQI
17°C10/24°C
12th Oct 2025387 AMAQI
12th Oct 2025278 AMAQI
12th Oct 2025569 AMAQI
12th Oct 20255710 AMAQI
12th Oct 20255811 AMAQI
12th Oct 20253912 PMAQI
12th Oct 2025211 PMAQI
12th Oct 2025382 PMAQI
12th Oct 2025563 PMAQI
12th Oct 2025564 PMAQI
12th Oct 2025415 PMAQI
12th Oct 2025466 PMAQI
12th Oct 2025477 PMAQI
12th Oct 2025508 PMAQI
12th Oct 2025529 PMAQI
12th Oct 20254810 PMAQI
12th Oct 20252311 PMAQI
13th Oct 20255112 AMAQI
13th Oct 2025501 AMAQI
13th Oct 2025572 AMAQI
13th Oct 2025583 AMAQI
13th Oct 2025504 AMAQI
13th Oct 2025545 AMAQI
13th Oct 2025586 AMAQI
18°C11/27°C
13th Oct 2025557 AMAQI
13th Oct 2025498 AMAQI
13th Oct 2025479 AMAQI
13th Oct 20255310 AMAQI
13th Oct 20255211 AMAQI
13th Oct 20255112 PMAQI
13th Oct 2025531 PMAQI
13th Oct 2025512 PMAQI
13th Oct 2025523 PMAQI
13th Oct 2025454 PMAQI
13th Oct 2025485 PMAQI
13th Oct 2025546 PMAQI
13th Oct 2025537 PMAQI
13th Oct 2025548 PMAQI
13th Oct 2025549 PMAQI
13th Oct 20254810 PMAQI
13th Oct 20254711 PMAQI
14th Oct 20255512 AMAQI
14th Oct 2025561 AMAQI
14th Oct 2025422 AMAQI
14th Oct 2025443 AMAQI
14th Oct 2025564 AMAQI
14th Oct 2025585 AMAQI
14th Oct 2025576 AMAQI
14°C10/21°C
14th Oct 2025597 AMAQI
14th Oct 2025618 AMAQI
14th Oct 2025569 AMAQI
14th Oct 20255710 AMAQI
14th Oct 20254911 AMAQI
14th Oct 20255412 PMAQI
14th Oct 2025511 PMAQI
14th Oct 2025222 PMAQI
14th Oct 2025133 PMAQI
14th Oct 2025424 PMAQI
14th Oct 2025555 PMAQI
14th Oct 2025546 PMAQI
14th Oct 2025577 PMAQI
14th Oct 2025578 PMAQI
14th Oct 2025559 PMAQI
14th Oct 20255110 PMAQI
14th Oct 20254311 PMAQI
15th Oct 20254412 AMAQI
15th Oct 2025481 AMAQI
15th Oct 2025402 AMAQI
15th Oct 2025463 AMAQI
15th Oct 2025504 AMAQI
15th Oct 2025515 AMAQI
15th Oct 2025516 AMAQI
12°C10/15°C
15th Oct 2025457 AMAQI
15th Oct 2025568 AMAQI
15th Oct 2025589 AMAQI
15th Oct 20254510 AMAQI
15th Oct 20254711 AMAQI
15th Oct 20254912 PMAQI
15th Oct 2025541 PMAQI
15th Oct 2025542 PMAQI
15th Oct 2025533 PMAQI
15th Oct 2025544 PMAQI
15th Oct 2025565 PMAQI
15th Oct 2025566 PMAQI
15th Oct 2025547 PMAQI
15th Oct 2025418 PMAQI
15th Oct 2025519 PMAQI
15th Oct 20254210 PMAQI
15th Oct 20254211 PMAQI
16th Oct 20255212 AMAQI
16th Oct 2025541 AMAQI
16th Oct 2025552 AMAQI
16th Oct 2025543 AMAQI
16th Oct 2025514 AMAQI
16th Oct 2025495 AMAQI
16th Oct 2025586 AMAQI
13°C12/18°C
16th Oct 2025587 AMAQI
16th Oct 2025408 AMAQI
16th Oct 2025289 AMAQI
16th Oct 20256710 AMAQI
16th Oct 20259611 AMAQI
16th Oct 20259712 PMAQI
16th Oct 2025621 PMAQI
16th Oct 2025542 PMAQI
16th Oct 2025463 PMAQI
16th Oct 2025184 PMAQI
16th Oct 2025495 PMAQI
16th Oct 2025706 PMAQI
16th Oct 2025737 PMAQI
16th Oct 2025728 PMAQI
16th Oct 2025709 PMAQI
16th Oct 20255610 PMAQI
16th Oct 20255611 PMAQI
17th Oct 20255812 AMAQI
17th Oct 2025541 AMAQI
17th Oct 2025502 AMAQI
17th Oct 2025573 AMAQI
17th Oct 2025564 AMAQI
17th Oct 2025625 AMAQI
17th Oct 2025636 AMAQI
15°C9/23°C
17th Oct 2025577 AMAQI
17th Oct 2025548 AMAQI
17th Oct 2025539 AMAQI
17th Oct 20255110 AMAQI
17th Oct 20254611 AMAQI
17th Oct 20254512 PMAQI
17th Oct 2025441 PMAQI
17th Oct 2025402 PMAQI
17th Oct 2025393 PMAQI
17th Oct 2025384 PMAQI
17th Oct 2025505 PMAQI
17th Oct 2025546 PMAQI
17th Oct 2025577 PMAQI
17th Oct 2025598 PMAQI
17th Oct 2025579 PMAQI
17th Oct 20254610 PMAQI
17th Oct 20256111 PMAQI
18th Oct 20256412 AMAQI
18th Oct 2025631 AMAQI
18th Oct 2025552 AMAQI
18th Oct 2025603 AMAQI
18th Oct 2025424 AMAQI
18th Oct 2025565 AMAQI
18th Oct 2025646 AMAQI
16°C8/26°C
18th Oct 2025667 AMAQI
18th Oct 2025608 AMAQI
18th Oct 2025629 AMAQI
18th Oct 20255510 AMAQI
18th Oct 20254911 AMAQI
18th Oct 20256512 PMAQI
18th Oct 2025561 PMAQI
18th Oct 2025682 PMAQI
18th Oct 2025483 PMAQI
18th Oct 2025584 PMAQI
18th Oct 2025405 PMAQI
18th Oct 2025586 PMAQI
18th Oct 2025527 PMAQI
18th Oct 2025538 PMAQI
18th Oct 2025589 PMAQI
18th Oct 20255010 PMAQI
18th Oct 20254311 PMAQI
19th Oct 20254212 AMAQI
19th Oct 2025421 AMAQI
19th Oct 2025592 AMAQI
19th Oct 2025483 AMAQI
19th Oct 2025524 AMAQI
19th Oct 2025505 AMAQI
19th Oct 2025516 AMAQI
18°C11/28°C
19th Oct 2025647 AMAQI
19th Oct 2025688 AMAQI
19th Oct 2025609 AMAQI
19th Oct 20256510 AMAQI
19th Oct 20256011 AMAQI
19th Oct 20256512 PMAQI
19th Oct 2025571 PMAQI
19th Oct 2025562 PMAQI
19th Oct 2025573 PMAQI
19th Oct 2025554 PMAQI
19th Oct 2025605 PMAQI
19th Oct 2025476 PMAQI
19th Oct 2025367 PMAQI
19th Oct 2025598 PMAQI
19th Oct 2025579 PMAQI
19th Oct 20255310 PMAQI
19th Oct 20253611 PMAQI
20th Oct 20253712 AMAQI
20th Oct 2025541 AMAQI
20th Oct 2025552 AMAQI
20th Oct 2025563 AMAQI
20th Oct 2025574 AMAQI
20th Oct 2025555 AMAQI
20th Oct 2025576 AMAQI
20°C10/30°C
20th Oct 2025587 AMAQI
20th Oct 2025368 AMAQI
20th Oct 2025169 AMAQI
20th Oct 20253610 AMAQI
20th Oct 20253611 AMAQI
20th Oct 20255612 PMAQI
20th Oct 2025561 PMAQI
20th Oct 2025352 PMAQI
20th Oct 2025293 PMAQI
20th Oct 2025184 PMAQI
20th Oct 2025375 PMAQI
20th Oct 2025446 PMAQI
20th Oct 2025277 PMAQI
20th Oct 2025368 PMAQI
20th Oct 2025569 PMAQI
20th Oct 20255710 PMAQI
20th Oct 20255611 PMAQI
21st Oct 20255612 AMAQI
21st Oct 2025581 AMAQI
21st Oct 2025612 AMAQI
21st Oct 2025553 AMAQI
21st Oct 2025544 AMAQI
21st Oct 2025575 AMAQI
21st Oct 2025436 AMAQI
21°C15/29°C
21st Oct 2025177 AMAQI
21st Oct 2025158 AMAQI
21st Oct 2025189 AMAQI
21st Oct 20252010 AMAQI
21st Oct 20252111 AMAQI
21st Oct 20252712 PMAQI
21st Oct 2025311 PMAQI
21st Oct 2025242 PMAQI
21st Oct 2025253 PMAQI
21st Oct 2025294 PMAQI
21st Oct 2025305 PMAQI
21st Oct 2025366 PMAQI
21st Oct 2025387 PMAQI
21st Oct 2025348 PMAQI
21st Oct 2025399 PMAQI
21st Oct 20254410 PMAQI
21st Oct 20254911 PMAQI
22nd Oct 20254712 AMAQI
22nd Oct 2025491 AMAQI
22nd Oct 2025502 AMAQI
22nd Oct 2025463 AMAQI
22nd Oct 2025464 AMAQI
22nd Oct 2025395 AMAQI
22nd Oct 2025446 AMAQI
19°C10/30°C
22nd Oct 2025377 AMAQI
22nd Oct 2025228 AMAQI
22nd Oct 2025229 AMAQI
22nd Oct 20252410 AMAQI
22nd Oct 20253011 AMAQI
22nd Oct 20252412 PMAQI
22nd Oct 2025161 PMAQI
22nd Oct 2025172 PMAQI
22nd Oct 2025263 PMAQI
22nd Oct 2025284 PMAQI
22nd Oct 2025335 PMAQI
22nd Oct 2025496 PMAQI
22nd Oct 2025477 PMAQI
22nd Oct 2025398 PMAQI
22nd Oct 2025369 PMAQI
22nd Oct 20253310 PMAQI
22nd Oct 20253611 PMAQI
23rd Oct 20254712 AMAQI
23rd Oct 2025491 AMAQI
23rd Oct 2025342 AMAQI
23rd Oct 2025313 AMAQI
23rd Oct 2025374 AMAQI
23rd Oct 2025355 AMAQI
23rd Oct 2025406 AMAQI
18°C14/25°C
23rd Oct 2025357 AMAQI
23rd Oct 2025308 AMAQI
23rd Oct 2025289 AMAQI
23rd Oct 20253510 AMAQI
23rd Oct 20252811 AMAQI
23rd Oct 20254012 PMAQI
23rd Oct 2025531 PMAQI
23rd Oct 2025562 PMAQI
23rd Oct 2025583 PMAQI
23rd Oct 2025514 PMAQI
23rd Oct 2025385 PMAQI
23rd Oct 2025426 PMAQI
23rd Oct 2025477 PMAQI
23rd Oct 2025448 PMAQI
23rd Oct 2025389 PMAQI
23rd Oct 20253310 PMAQI
23rd Oct 20253011 PMAQI
24th Oct 20252612 AMAQI
24th Oct 2025291 AMAQI
24th Oct 2025372 AMAQI
24th Oct 2025383 AMAQI
24th Oct 2025424 AMAQI
24th Oct 2025435 AMAQI
24th Oct 2025446 AMAQI
17°C10/23°C
24th Oct 2025447 AMAQI
24th Oct 2025308 AMAQI
24th Oct 2025259 AMAQI
24th Oct 20253610 AMAQI
24th Oct 20254711 AMAQI
24th Oct 20255012 PMAQI
24th Oct 2025561 PMAQI
24th Oct 2025562 PMAQI
24th Oct 2025443 PMAQI
24th Oct 2025304 PMAQI
24th Oct 2025245 PMAQI
24th Oct 2025216 PMAQI
24th Oct 2025367 PMAQI
24th Oct 2025458 PMAQI
24th Oct 2025409 PMAQI
24th Oct 20253910 PMAQI
24th Oct 20254111 PMAQI
25th Oct 20253712 AMAQI
25th Oct 2025281 AMAQI
25th Oct 2025232 AMAQI
25th Oct 2025203 AMAQI
25th Oct 2025174 AMAQI
25th Oct 2025155 AMAQI
25th Oct 2025206 AMAQI
16°C10/25°C
25th Oct 2025327 AMAQI
25th Oct 2025308 AMAQI
25th Oct 2025259 AMAQI
25th Oct 20252010 AMAQI
25th Oct 20251411 AMAQI
25th Oct 20251712 PMAQI
25th Oct 2025161 PMAQI
25th Oct 2025262 PMAQI
25th Oct 2025383 PMAQI
25th Oct 2025204 PMAQI
25th Oct 2025145 PMAQI
25th Oct 2025176 PMAQI
25th Oct 2025207 PMAQI
25th Oct 2025178 PMAQI
25th Oct 2025219 PMAQI
25th Oct 20252510 PMAQI
25th Oct 20251711 PMAQI
26th Oct 20253112 AMAQI
26th Oct 2025401 AMAQI
26th Oct 2025302 AMAQI
26th Oct 2025253 AMAQI
26th Oct 2025254 AMAQI
26th Oct 2025285 AMAQI
26th Oct 2025316 AMAQI
16°C13/23°C
26th Oct 2025377 AMAQI
26th Oct 2025368 AMAQI
26th Oct 2025259 AMAQI
26th Oct 20251710 AMAQI
26th Oct 20252211 AMAQI
26th Oct 20253012 PMAQI
26th Oct 2025361 PMAQI
26th Oct 2025422 PMAQI
26th Oct 2025363 PMAQI
26th Oct 2025234 PMAQI
26th Oct 2025235 PMAQI
26th Oct 2025216 PMAQI
26th Oct 2025207 PMAQI
26th Oct 2025288 PMAQI
26th Oct 2025309 PMAQI
26th Oct 20253810 PMAQI
26th Oct 20254611 PMAQI
27th Oct 20254312 AMAQI
27th Oct 2025341 AMAQI
27th Oct 2025342 AMAQI
27th Oct 2025473 AMAQI
27th Oct 2025524 AMAQI
27th Oct 2025405 AMAQI
27th Oct 2025236 AMAQI
16°C13/20°C
27th Oct 2025157 AMAQI
27th Oct 2025198 AMAQI
27th Oct 2025209 AMAQI
27th Oct 20252310 AMAQI
27th Oct 20253411 AMAQI
27th Oct 20254212 PMAQI
27th Oct 2025461 PMAQI
27th Oct 2025352 PMAQI
27th Oct 2025193 PMAQI
27th Oct 2025284 PMAQI
27th Oct 2025365 PMAQI
27th Oct 2025266 PMAQI
27th Oct 2025257 PMAQI
27th Oct 2025248 PMAQI
27th Oct 2025219 PMAQI
27th Oct 20252210 PMAQI
27th Oct 20252511 PMAQI
28th Oct 20252412 AMAQI
28th Oct 2025191 AMAQI
28th Oct 2025172 AMAQI
28th Oct 2025163 AMAQI
28th Oct 2025154 AMAQI
28th Oct 2025145 AMAQI
28th Oct 2025376 AMAQI
16°C12/24°C
28th Oct 2025427 AMAQI
28th Oct 2025228 AMAQI
28th Oct 2025229 AMAQI
28th Oct 20254010 AMAQI
28th Oct 20256511 AMAQI
28th Oct 20257912 PMAQI
28th Oct 2025681 PMAQI
28th Oct 2025392 PMAQI
28th Oct 2025223 PMAQI
28th Oct 2025204 PMAQI
28th Oct 2025255 PMAQI
28th Oct 2025256 PMAQI
28th Oct 2025217 PMAQI
28th Oct 2025298 PMAQI
28th Oct 2025319 PMAQI
28th Oct 20252510 PMAQI
28th Oct 20253611 PMAQI
29th Oct 20254212 AMAQI
29th Oct 2025391 AMAQI
29th Oct 2025392 AMAQI
29th Oct 2025393 AMAQI
29th Oct 2025364 AMAQI
29th Oct 2025385 AMAQI
29th Oct 2025356 AMAQI
16°C8/26°C
29th Oct 2025227 AMAQI
29th Oct 2025228 AMAQI
29th Oct 2025229 AMAQI
29th Oct 20253810 AMAQI
29th Oct 20255211 AMAQI
29th Oct 20255312 PMAQI
29th Oct 2025561 PMAQI
29th Oct 2025482 PMAQI
29th Oct 2025393 PMAQI
29th Oct 2025304 PMAQI
29th Oct 2025285 PMAQI
29th Oct 2025286 PMAQI
29th Oct 2025267 PMAQI
29th Oct 2025298 PMAQI
29th Oct 2025279 PMAQI
29th Oct 20254910 PMAQI
29th Oct 20255011 PMAQI
30th Oct 20253512 AMAQI
30th Oct 2025441 AMAQI
30th Oct 2025562 AMAQI
30th Oct 2025573 AMAQI
30th Oct 2025444 AMAQI
30th Oct 2025345 AMAQI
30th Oct 2025236 AMAQI
20°C12/30°C
30th Oct 2025307 AMAQI
30th Oct 2025428 AMAQI
30th Oct 2025369 AMAQI
30th Oct 20252710 AMAQI
30th Oct 20253911 AMAQI
30th Oct 20254812 PMAQI
30th Oct 2025421 PMAQI
30th Oct 2025422 PMAQI
30th Oct 2025343 PMAQI
30th Oct 2025244 PMAQI
30th Oct 2025415 PMAQI
30th Oct 2025626 PMAQI
30th Oct 2025637 PMAQI
30th Oct 2025488 PMAQI
30th Oct 2025339 PMAQI
30th Oct 20253710 PMAQI
30th Oct 20255211 PMAQI
31st Oct 20255712 AMAQI
31st Oct 2025481 AMAQI
15°C10/20°C
7 AM
12 PM
6 PM
12 AM
6 AM
--°C/°C
Day time
Avg. Highest Time
12 PM
48AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
4 PM
39AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 12 PM (Avg. 48), while the lowest AQI was between 4 PM to 4 PM (Avg. 39).
Night time
Avg. Highest Time
12 AM - 7 PM
45AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
8 PM - 11 PM
44AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 7 PM (Avg. 45), while the lowest AQI was between 8 PM to 11 PM (Avg. 44).
2025 Days Vs Air Quality
Vacaville, California, United States
2025
96%
291
4%
12
Total number of days with different AQI categories in last 304 days in 2025 (61 days remaining)
Good
291 DaysModerate
12 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 304 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
Vacaville, 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
54AQI
54AQI
2nd January 2025
38AQI
38AQI
3rd January 2025
40AQI
40AQI
4th January 2025
21AQI
21AQI
5th January 2025
27AQI
27AQI
6th January 2025
32AQI
32AQI
7th January 2025
20AQI
20AQI
8th January 2025
23AQI
23AQI
9th January 2025
29AQI
29AQI
10th January 2025
39AQI
39AQI
11th January 2025
29AQI
29AQI
12th January 2025
22AQI
22AQI
13th January 2025
25AQI
25AQI
14th January 2025
26AQI
26AQI
15th January 2025
42AQI
42AQI
16th January 2025
43AQI
43AQI
17th January 2025
46AQI
46AQI
18th January 2025
46AQI
46AQI
19th January 2025
50AQI
50AQI
20th January 2025
33AQI
33AQI
21st January 2025
33AQI
33AQI
22nd January 2025
41AQI
41AQI
23rd January 2025
46AQI
46AQI
24th January 2025
51AQI
51AQI
25th January 2025
41AQI
41AQI
26th January 2025
29AQI
29AQI
27th January 2025
25AQI
25AQI
28th January 2025
40AQI
40AQI
29th January 2025
42AQI
42AQI
30th January 2025
48AQI
48AQI
31st January 2025
41AQI
41AQI
1st February 2025
46AQI
46AQI
2nd February 2025
21AQI
21AQI
3rd February 2025
20AQI
20AQI
4th February 2025
19AQI
19AQI
5th February 2025
23AQI
23AQI
6th February 2025
23AQI
23AQI
7th February 2025
31AQI
31AQI
8th February 2025
22AQI
22AQI
9th February 2025
24AQI
24AQI
10th February 2025
24AQI
24AQI
11th February 2025
26AQI
26AQI
12th February 2025
28AQI
28AQI
13th February 2025
26AQI
26AQI
14th February 2025
22AQI
22AQI
15th February 2025
22AQI
22AQI
16th February 2025
26AQI
26AQI
17th February 2025
20AQI
20AQI
18th February 2025
22AQI
22AQI
19th February 2025
23AQI
23AQI
20th February 2025
20AQI
20AQI
21st February 2025
20AQI
20AQI
22nd February 2025
27AQI
27AQI
23rd February 2025
22AQI
22AQI
24th February 2025
20AQI
20AQI
25th February 2025
21AQI
21AQI
26th February 2025
25AQI
25AQI
27th February 2025
30AQI
30AQI
28th February 2025
28AQI
28AQI
1st March 2025
29AQI
29AQI
2nd March 2025
26AQI
26AQI
3rd March 2025
24AQI
24AQI
4th March 2025
27AQI
27AQI
5th March 2025
20AQI
20AQI
6th March 2025
19AQI
19AQI
7th March 2025
24AQI
24AQI
8th March 2025
23AQI
23AQI
9th March 2025
28AQI
28AQI
10th March 2025
26AQI
26AQI
11th March 2025
24AQI
24AQI
12th March 2025
21AQI
21AQI
13th March 2025
19AQI
19AQI
14th March 2025
20AQI
20AQI
15th March 2025
38AQI
38AQI
16th March 2025
31AQI
31AQI
17th March 2025
16AQI
16AQI
18th March 2025
20AQI
20AQI
19th March 2025
20AQI
20AQI
20th March 2025
15AQI
15AQI
21st March 2025
19AQI
19AQI
22nd March 2025
17AQI
17AQI
23rd March 2025
20AQI
20AQI
24th March 2025
19AQI
19AQI
25th March 2025
28AQI
28AQI
26th March 2025
25AQI
25AQI
27th March 2025
22AQI
22AQI
28th March 2025
21AQI
21AQI
29th March 2025
18AQI
18AQI
30th March 2025
21AQI
21AQI
31st March 2025
24AQI
24AQI
1st April 2025
17AQI
17AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
17AQI
17AQI
4th April 2025
27AQI
27AQI
5th April 2025
27AQI
27AQI
6th April 2025
23AQI
23AQI
7th April 2025
13AQI
13AQI
8th April 2025
15AQI
15AQI
9th April 2025
17AQI
17AQI
10th April 2025
17AQI
17AQI
11th April 2025
17AQI
17AQI
12th April 2025
25AQI
25AQI
13th April 2025
21AQI
21AQI
14th April 2025
24AQI
24AQI
15th April 2025
27AQI
27AQI
16th April 2025
29AQI
29AQI
17th April 2025
23AQI
23AQI
18th April 2025
23AQI
23AQI
19th April 2025
28AQI
28AQI
20th April 2025
26AQI
26AQI
21st April 2025
26AQI
26AQI
22nd April 2025
39AQI
39AQI
23rd April 2025
47AQI
47AQI
24th April 2025
39AQI
39AQI
25th April 2025
19AQI
19AQI
26th April 2025
18AQI
18AQI
27th April 2025
23AQI
23AQI
28th April 2025
24AQI
24AQI
29th April 2025
30AQI
30AQI
30th April 2025
31AQI
31AQI
1st May 2025
34AQI
34AQI
2nd May 2025
31AQI
31AQI
3rd May 2025
23AQI
23AQI
4th May 2025
27AQI
27AQI
5th May 2025
26AQI
26AQI
6th May 2025
27AQI
27AQI
7th May 2025
38AQI
38AQI
8th May 2025
36AQI
36AQI
9th May 2025
26AQI
26AQI
10th May 2025
23AQI
23AQI
11th May 2025
20AQI
20AQI
12th May 2025
21AQI
21AQI
13th May 2025
17AQI
17AQI
14th May 2025
20AQI
20AQI
15th May 2025
22AQI
22AQI
16th May 2025
30AQI
30AQI
17th May 2025
23AQI
23AQI
18th May 2025
25AQI
25AQI
19th May 2025
19AQI
19AQI
20th May 2025
16AQI
16AQI
21st May 2025
27AQI
27AQI
22nd May 2025
26AQI
26AQI
23rd May 2025
18AQI
18AQI
24th May 2025
31AQI
31AQI
25th May 2025
22AQI
22AQI
26th May 2025
15AQI
15AQI
27th May 2025
23AQI
23AQI
28th May 2025
23AQI
23AQI
29th May 2025
20AQI
20AQI
30th May 2025
24AQI
24AQI
31st May 2025
33AQI
33AQI
1st June 2025
47AQI
47AQI
2nd June 2025
50AQI
50AQI
3rd June 2025
35AQI
35AQI
4th June 2025
44AQI
44AQI
5th June 2025
33AQI
33AQI
6th June 2025
20AQI
20AQI
7th June 2025
24AQI
24AQI
8th June 2025
18AQI
18AQI
9th June 2025
17AQI
17AQI
10th June 2025
19AQI
19AQI
11th June 2025
37AQI
37AQI
12th June 2025
45AQI
45AQI
13th June 2025
40AQI
40AQI
14th June 2025
39AQI
39AQI
15th June 2025
35AQI
35AQI
16th June 2025
33AQI
33AQI
17th June 2025
29AQI
29AQI
18th June 2025
26AQI
26AQI
19th June 2025
32AQI
32AQI
20th June 2025
30AQI
30AQI
21st June 2025
26AQI
26AQI
22nd June 2025
22AQI
22AQI
23rd June 2025
21AQI
21AQI
24th June 2025
21AQI
21AQI
25th June 2025
19AQI
19AQI
26th June 2025
27AQI
27AQI
27th June 2025
32AQI
32AQI
28th June 2025
32AQI
32AQI
29th June 2025
25AQI
25AQI
30th June 2025
21AQI
21AQI
1st July 2025
24AQI
24AQI
2nd July 2025
20AQI
20AQI
3rd July 2025
35AQI
35AQI
4th July 2025
25AQI
25AQI
5th July 2025
27AQI
27AQI
6th July 2025
27AQI
27AQI
7th July 2025
20AQI
20AQI
8th July 2025
18AQI
18AQI
9th July 2025
17AQI
17AQI
10th July 2025
22AQI
22AQI
11th July 2025
39AQI
39AQI
12th July 2025
44AQI
44AQI
13th July 2025
30AQI
30AQI
14th July 2025
19AQI
19AQI
15th July 2025
17AQI
17AQI
16th July 2025
18AQI
18AQI
17th July 2025
18AQI
18AQI
18th July 2025
16AQI
16AQI
19th July 2025
19AQI
19AQI
20th July 2025
17AQI
17AQI
21st July 2025
23AQI
23AQI
22nd July 2025
15AQI
15AQI
23rd July 2025
15AQI
15AQI
24th July 2025
15AQI
15AQI
25th July 2025
15AQI
15AQI
26th July 2025
15AQI
15AQI
27th July 2025
16AQI
16AQI
28th July 2025
18AQI
18AQI
29th July 2025
25AQI
25AQI
30th July 2025
28AQI
28AQI
31st July 2025
27AQI
27AQI
1st August 2025
27AQI
27AQI
2nd August 2025
24AQI
24AQI
3rd August 2025
32AQI
32AQI
4th August 2025
33AQI
33AQI
5th August 2025
28AQI
28AQI
6th August 2025
38AQI
38AQI
7th August 2025
31AQI
31AQI
8th August 2025
38AQI
38AQI
9th August 2025
37AQI
37AQI
10th August 2025
31AQI
31AQI
11th August 2025
29AQI
29AQI
12th August 2025
28AQI
28AQI
13th August 2025
27AQI
27AQI
14th August 2025
21AQI
21AQI
15th August 2025
40AQI
40AQI
16th August 2025
19AQI
19AQI
17th August 2025
16AQI
16AQI
18th August 2025
19AQI
19AQI
19th August 2025
21AQI
21AQI
20th August 2025
29AQI
29AQI
21st August 2025
37AQI
37AQI
22nd August 2025
53AQI
53AQI
23rd August 2025
40AQI
40AQI
24th August 2025
30AQI
30AQI
25th August 2025
32AQI
32AQI
26th August 2025
37AQI
37AQI
27th August 2025
40AQI
40AQI
28th August 2025
38AQI
38AQI
29th August 2025
29AQI
29AQI
30th August 2025
32AQI
32AQI
31st August 2025
32AQI
32AQI
1st September 2025
32AQI
32AQI
2nd September 2025
44AQI
44AQI
3rd September 2025
32AQI
32AQI
4th September 2025
29AQI
29AQI
5th September 2025
26AQI
26AQI
6th September 2025
32AQI
32AQI
7th September 2025
29AQI
29AQI
8th September 2025
21AQI
21AQI
9th September 2025
17AQI
17AQI
10th September 2025
19AQI
19AQI
11th September 2025
28AQI
28AQI
12th September 2025
32AQI
32AQI
13th September 2025
35AQI
35AQI
14th September 2025
25AQI
25AQI
15th September 2025
27AQI
27AQI
16th September 2025
36AQI
36AQI
17th September 2025
39AQI
39AQI
18th September 2025
39AQI
39AQI
19th September 2025
37AQI
37AQI
20th September 2025
39AQI
39AQI
21st September 2025
33AQI
33AQI
22nd September 2025
33AQI
33AQI
23rd September 2025
38AQI
38AQI
24th September 2025
46AQI
46AQI
25th September 2025
35AQI
35AQI
26th September 2025
40AQI
40AQI
27th September 2025
46AQI
46AQI
28th September 2025
34AQI
34AQI
29th September 2025
29AQI
29AQI
30th September 2025
23AQI
23AQI
1st October 2025
36AQI
36AQI
2nd October 2025
43AQI
43AQI
3rd October 2025
51AQI
51AQI
4th October 2025
48AQI
48AQI
5th October 2025
51AQI
51AQI
6th October 2025
46AQI
46AQI
7th October 2025
48AQI
48AQI
8th October 2025
52AQI
52AQI
9th October 2025
50AQI
50AQI
10th October 2025
47AQI
47AQI
11th October 2025
40AQI
40AQI
12th October 2025
48AQI
48AQI
13th October 2025
52AQI
52AQI
14th October 2025
51AQI
51AQI
15th October 2025
49AQI
49AQI
16th October 2025
59AQI
59AQI
17th October 2025
53AQI
53AQI
18th October 2025
56AQI
56AQI
19th October 2025
53AQI
53AQI
20th October 2025
46AQI
46AQI
21st October 2025
40AQI
40AQI
22nd October 2025
38AQI
38AQI
23rd October 2025
40AQI
40AQI
24th October 2025
37AQI
37AQI
25th October 2025
22AQI
22AQI
26th October 2025
29AQI
29AQI
27th October 2025
31AQI
31AQI
28th October 2025
29AQI
29AQI
29th October 2025
37AQI
37AQI
30th October 2025
43AQI
43AQI
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
36AQI
24AQI
23AQI
24AQI
25AQI
30AQI
22AQI
31AQI
33AQI
44AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202529AQI
29
2
28
31
30
31
30
31
30
1
30
21
9
291
12
Highest AQI recorded in
October44AQI
Lowest AQI recorded in
July22AQI
202422AQI
31
29
29
2
30
31
29
29
2
31
30
31
27
3
25
6
352
13
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
May11AQI
202328AQI
30
1
28
31
30
30
1
29
1
31
29
2
26
4
31
28
1
31
354
10
Highest AQI recorded in
February34AQI
Lowest AQI recorded in
October16AQI
202232AQI
17
13
20
2
31
25
31
30
19
1
1
27
2
31
28
2
24
7
284
27
Highest AQI recorded in
January49AQI
Lowest AQI recorded in
July25AQI
202136AQI
20
10
26
2
31
30
31
30
31
16
13
2
21
9
30
1
20
10
22
9
308
54
2
Highest AQI recorded in
August56AQI
Lowest AQI recorded in
June26AQI
202044AQI
12
20
18
30
30
1
16
4
9
2
11
9
6
4
18
10
3
26
4
20
11
201
39
15
9
Highest AQI recorded in
September80AQI
Lowest AQI recorded in
July19AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
44AQILeast Polluted Year Recorded
2024(Avg.)
22AQIVacaville's annual 2025 AQI (29) shows an average percentage change of -5.1% (improved AQI) compared to previous years: 2020 (44), 2021 (36), 2022 (32), 2023 (28), 2024 (22).
