San Francisco, 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
San Francisco, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
18th Oct 2025
67AQILowest AQI recorded on
7th Oct 2022
15AQISame Day Analysis (18th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 67 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 18th Oct - 19th Oct 2025
San Francisco, California, United States
AQI
Day
Night
.
7 AM18th Oct 2025
6 PM
6 AM19th Oct 2025
Day time
Avg. Highest Time
1PM18th Oct
85AQI
Avg. Lowest Time
9AM18th Oct
54AQI
Night time
Avg. Highest Time
2AM19th Oct
94AQI
Avg. Lowest Time
8PM18th Oct
60AQI
In the last 24 hours,
San Francisco's AQI reached its highest point of 94 at 2 AM during the Night, while the lowest point, 54, was recorded at 9 AM during the Day between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
San Francisco, California, United States
SepOct
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th
Day
Night
19th Sep 2025407 AMAQI
19th Sep 2025368 AMAQI
19th Sep 2025349 AMAQI
19th Sep 20253410 AMAQI
19th Sep 20253411 AMAQI
19th Sep 20253612 PMAQI
19th Sep 2025331 PMAQI
19th Sep 2025302 PMAQI
19th Sep 2025363 PMAQI
19th Sep 2025364 PMAQI
19th Sep 2025355 PMAQI
19th Sep 2025326 PMAQI
19th Sep 2025367 PMAQI
19th Sep 2025368 PMAQI
19th Sep 2025329 PMAQI
19th Sep 20253410 PMAQI
19th Sep 20253711 PMAQI
20th Sep 20253612 AMAQI
20th Sep 2025371 AMAQI
20th Sep 2025372 AMAQI
20th Sep 2025383 AMAQI
20th Sep 2025384 AMAQI
20th Sep 2025425 AMAQI
20th Sep 2025426 AMAQI
16°C15/17°C
20th Sep 2025437 AMAQI
20th Sep 2025368 AMAQI
20th Sep 2025359 AMAQI
20th Sep 20253410 AMAQI
20th Sep 20253211 AMAQI
20th Sep 20253512 PMAQI
20th Sep 2025391 PMAQI
20th Sep 2025442 PMAQI
20th Sep 2025413 PMAQI
20th Sep 2025414 PMAQI
20th Sep 2025385 PMAQI
20th Sep 2025376 PMAQI
20th Sep 2025387 PMAQI
20th Sep 2025378 PMAQI
20th Sep 2025369 PMAQI
20th Sep 20253710 PMAQI
20th Sep 20253811 PMAQI
21st Sep 20254012 AMAQI
21st Sep 2025411 AMAQI
21st Sep 2025412 AMAQI
21st Sep 2025373 AMAQI
21st Sep 2025384 AMAQI
21st Sep 2025375 AMAQI
21st Sep 2025366 AMAQI
16°C15/18°C
21st Sep 2025407 AMAQI
21st Sep 2025308 AMAQI
21st Sep 2025269 AMAQI
21st Sep 20252710 AMAQI
21st Sep 20252511 AMAQI
21st Sep 20252312 PMAQI
21st Sep 2025241 PMAQI
21st Sep 2025232 PMAQI
21st Sep 2025273 PMAQI
21st Sep 2025284 PMAQI
21st Sep 2025295 PMAQI
21st Sep 2025286 PMAQI
21st Sep 2025307 PMAQI
21st Sep 2025318 PMAQI
21st Sep 2025319 PMAQI
21st Sep 20253310 PMAQI
21st Sep 20253211 PMAQI
22nd Sep 20253312 AMAQI
22nd Sep 2025331 AMAQI
22nd Sep 2025362 AMAQI
22nd Sep 2025383 AMAQI
22nd Sep 2025324 AMAQI
22nd Sep 2025295 AMAQI
22nd Sep 2025276 AMAQI
18°C15/25°C
22nd Sep 2025317 AMAQI
22nd Sep 2025288 AMAQI
22nd Sep 2025309 AMAQI
22nd Sep 20253210 AMAQI
22nd Sep 20253511 AMAQI
22nd Sep 20254512 PMAQI
22nd Sep 2025471 PMAQI
22nd Sep 2025502 PMAQI
22nd Sep 2025413 PMAQI
22nd Sep 2025434 PMAQI
22nd Sep 2025395 PMAQI
22nd Sep 2025376 PMAQI
22nd Sep 2025357 PMAQI
22nd Sep 2025358 PMAQI
22nd Sep 2025409 PMAQI
22nd Sep 20253810 PMAQI
22nd Sep 20254011 PMAQI
23rd Sep 20253912 AMAQI
23rd Sep 2025401 AMAQI
23rd Sep 2025412 AMAQI
23rd Sep 2025423 AMAQI
23rd Sep 2025464 AMAQI
23rd Sep 2025415 AMAQI
23rd Sep 2025436 AMAQI
18°C12/26°C
23rd Sep 2025407 AMAQI
23rd Sep 2025438 AMAQI
23rd Sep 2025409 AMAQI
23rd Sep 20254310 AMAQI
23rd Sep 20254411 AMAQI
23rd Sep 20255012 PMAQI
23rd Sep 2025501 PMAQI
23rd Sep 2025492 PMAQI
23rd Sep 2025453 PMAQI
23rd Sep 2025434 PMAQI
23rd Sep 2025465 PMAQI
23rd Sep 2025456 PMAQI
23rd Sep 2025427 PMAQI
23rd Sep 2025418 PMAQI
23rd Sep 2025399 PMAQI
23rd Sep 20253910 PMAQI
23rd Sep 20253911 PMAQI
24th Sep 20253912 AMAQI
24th Sep 2025421 AMAQI
24th Sep 2025422 AMAQI
24th Sep 2025473 AMAQI
24th Sep 2025544 AMAQI
24th Sep 2025475 AMAQI
24th Sep 2025446 AMAQI
23°C15/35°C
24th Sep 2025467 AMAQI
24th Sep 2025488 AMAQI
24th Sep 2025469 AMAQI
24th Sep 20255210 AMAQI
24th Sep 20255311 AMAQI
24th Sep 20255212 PMAQI
24th Sep 2025531 PMAQI
24th Sep 2025542 PMAQI
24th Sep 2025533 PMAQI
24th Sep 2025534 PMAQI
24th Sep 2025515 PMAQI
24th Sep 2025516 PMAQI
24th Sep 2025507 PMAQI
24th Sep 2025498 PMAQI
24th Sep 2025499 PMAQI
24th Sep 20254510 PMAQI
24th Sep 20254611 PMAQI
25th Sep 20254612 AMAQI
25th Sep 2025501 AMAQI
25th Sep 2025482 AMAQI
25th Sep 2025403 AMAQI
25th Sep 2025354 AMAQI
25th Sep 2025355 AMAQI
25th Sep 2025306 AMAQI
20°C16/28°C
25th Sep 2025227 AMAQI
25th Sep 2025248 AMAQI
25th Sep 2025199 AMAQI
25th Sep 20251910 AMAQI
25th Sep 20252811 AMAQI
25th Sep 20253312 PMAQI
25th Sep 2025371 PMAQI
25th Sep 2025462 PMAQI
25th Sep 2025473 PMAQI
25th Sep 2025454 PMAQI
25th Sep 2025525 PMAQI
25th Sep 2025546 PMAQI
25th Sep 2025557 PMAQI
25th Sep 2025478 PMAQI
25th Sep 2025449 PMAQI
25th Sep 20253510 PMAQI
25th Sep 20253211 PMAQI
26th Sep 20252712 AMAQI
26th Sep 2025331 AMAQI
26th Sep 2025432 AMAQI
26th Sep 2025523 AMAQI
26th Sep 2025514 AMAQI
26th Sep 2025535 AMAQI
26th Sep 2025536 AMAQI
18°C15/21°C
26th Sep 2025427 AMAQI
26th Sep 2025458 AMAQI
26th Sep 2025529 AMAQI
26th Sep 20255610 AMAQI
26th Sep 20255611 AMAQI
26th Sep 20255812 PMAQI
26th Sep 2025581 PMAQI
26th Sep 2025542 PMAQI
26th Sep 2025563 PMAQI
26th Sep 2025594 PMAQI
26th Sep 2025605 PMAQI
26th Sep 2025606 PMAQI
26th Sep 2025627 PMAQI
26th Sep 2025688 PMAQI
26th Sep 2025679 PMAQI
26th Sep 20256610 PMAQI
26th Sep 20256811 PMAQI
27th Sep 20256712 AMAQI
27th Sep 2025671 AMAQI
27th Sep 2025632 AMAQI
27th Sep 2025583 AMAQI
27th Sep 2025584 AMAQI
27th Sep 2025585 AMAQI
27th Sep 2025586 AMAQI
18°C13/26°C
27th Sep 2025577 AMAQI
27th Sep 2025558 AMAQI
27th Sep 2025589 AMAQI
27th Sep 20255910 AMAQI
27th Sep 20255911 AMAQI
27th Sep 20256512 PMAQI
27th Sep 2025611 PMAQI
27th Sep 2025552 PMAQI
27th Sep 2025483 PMAQI
27th Sep 2025484 PMAQI
27th Sep 2025535 PMAQI
27th Sep 2025526 PMAQI
27th Sep 2025447 PMAQI
27th Sep 2025478 PMAQI
27th Sep 2025599 PMAQI
27th Sep 20256910 PMAQI
27th Sep 20256511 PMAQI
28th Sep 20256212 AMAQI
28th Sep 2025661 AMAQI
28th Sep 2025532 AMAQI
28th Sep 2025473 AMAQI
28th Sep 2025474 AMAQI
28th Sep 2025475 AMAQI
28th Sep 2025476 AMAQI
16°C13/20°C
28th Sep 2025437 AMAQI
28th Sep 2025288 AMAQI
28th Sep 2025289 AMAQI
28th Sep 20254510 AMAQI
28th Sep 20255711 AMAQI
28th Sep 20255812 PMAQI
28th Sep 2025591 PMAQI
28th Sep 2025662 PMAQI
28th Sep 2025643 PMAQI
28th Sep 2025534 PMAQI
28th Sep 2025375 PMAQI
28th Sep 2025356 PMAQI
28th Sep 2025397 PMAQI
28th Sep 2025298 PMAQI
28th Sep 2025229 PMAQI
28th Sep 20251910 PMAQI
28th Sep 20252111 PMAQI
29th Sep 20252212 AMAQI
29th Sep 2025161 AMAQI
29th Sep 2025152 AMAQI
29th Sep 2025143 AMAQI
29th Sep 2025164 AMAQI
29th Sep 2025175 AMAQI
29th Sep 2025216 AMAQI
18°C15/21°C
29th Sep 2025217 AMAQI
29th Sep 2025268 AMAQI
29th Sep 2025269 AMAQI
29th Sep 20252910 AMAQI
29th Sep 20252811 AMAQI
29th Sep 20253712 PMAQI
29th Sep 2025331 PMAQI
29th Sep 2025342 PMAQI
29th Sep 2025363 PMAQI
29th Sep 2025374 PMAQI
29th Sep 2025465 PMAQI
29th Sep 2025386 PMAQI
29th Sep 2025397 PMAQI
29th Sep 2025308 PMAQI
29th Sep 2025189 PMAQI
29th Sep 20251910 PMAQI
29th Sep 20252511 PMAQI
30th Sep 20252412 AMAQI
30th Sep 2025161 AMAQI
30th Sep 2025182 AMAQI
30th Sep 2025173 AMAQI
30th Sep 2025214 AMAQI
30th Sep 2025185 AMAQI
30th Sep 2025156 AMAQI
18°C16/22°C
30th Sep 2025127 AMAQI
30th Sep 2025158 AMAQI
30th Sep 2025199 AMAQI
30th Sep 20252210 AMAQI
30th Sep 20252111 AMAQI
30th Sep 20252512 PMAQI
30th Sep 2025211 PMAQI
30th Sep 2025182 PMAQI
30th Sep 2025153 PMAQI
30th Sep 2025164 PMAQI
30th Sep 2025185 PMAQI
30th Sep 2025166 PMAQI
30th Sep 2025147 PMAQI
30th Sep 2025138 PMAQI
30th Sep 2025159 PMAQI
30th Sep 20251210 PMAQI
30th Sep 20251111 PMAQI
1st Oct 20251712 AMAQI
1st Oct 2025161 AMAQI
1st Oct 2025242 AMAQI
1st Oct 2025333 AMAQI
1st Oct 2025314 AMAQI
1st Oct 2025355 AMAQI
1st Oct 2025366 AMAQI
18°C15/22°C
1st Oct 2025377 AMAQI
1st Oct 2025338 AMAQI
1st Oct 2025249 AMAQI
1st Oct 20253010 AMAQI
1st Oct 20253911 AMAQI
1st Oct 20254212 PMAQI
1st Oct 2025421 PMAQI
1st Oct 2025462 PMAQI
1st Oct 2025413 PMAQI
1st Oct 2025414 PMAQI
1st Oct 2025335 PMAQI
1st Oct 2025406 PMAQI
1st Oct 2025397 PMAQI
1st Oct 2025418 PMAQI
1st Oct 2025319 PMAQI
1st Oct 20255610 PMAQI
1st Oct 20255611 PMAQI
2nd Oct 20254612 AMAQI
2nd Oct 2025461 AMAQI
2nd Oct 2025452 AMAQI
2nd Oct 2025423 AMAQI
2nd Oct 2025354 AMAQI
2nd Oct 2025355 AMAQI
2nd Oct 2025356 AMAQI
19°C17/23°C
2nd Oct 2025357 AMAQI
2nd Oct 2025208 AMAQI
2nd Oct 2025259 AMAQI
2nd Oct 20254210 AMAQI
2nd Oct 20255111 AMAQI
2nd Oct 20255212 PMAQI
2nd Oct 2025521 PMAQI
2nd Oct 2025562 PMAQI
2nd Oct 2025353 PMAQI
2nd Oct 2025514 PMAQI
2nd Oct 2025395 PMAQI
2nd Oct 2025466 PMAQI
2nd Oct 2025607 PMAQI
2nd Oct 2025548 PMAQI
2nd Oct 2025549 PMAQI
2nd Oct 20255810 PMAQI
2nd Oct 20255911 PMAQI
3rd Oct 20255512 AMAQI
3rd Oct 2025361 AMAQI
3rd Oct 2025352 AMAQI
3rd Oct 2025353 AMAQI
3rd Oct 2025334 AMAQI
3rd Oct 2025395 AMAQI
3rd Oct 2025376 AMAQI
17°C14/22°C
3rd Oct 2025337 AMAQI
3rd Oct 2025508 AMAQI
3rd Oct 2025469 AMAQI
3rd Oct 20253910 AMAQI
3rd Oct 20255011 AMAQI
3rd Oct 20254712 PMAQI
3rd Oct 2025381 PMAQI
3rd Oct 2025402 PMAQI
3rd Oct 2025383 PMAQI
3rd Oct 2025564 PMAQI
3rd Oct 2025515 PMAQI
3rd Oct 2025396 PMAQI
3rd Oct 2025547 PMAQI
3rd Oct 2025548 PMAQI
3rd Oct 2025599 PMAQI
3rd Oct 20256210 PMAQI
3rd Oct 20256611 PMAQI
4th Oct 20257012 AMAQI
4th Oct 2025641 AMAQI
4th Oct 2025642 AMAQI
4th Oct 2025613 AMAQI
4th Oct 2025644 AMAQI
4th Oct 2025605 AMAQI
4th Oct 2025606 AMAQI
17°C14/23°C
4th Oct 2025397 AMAQI
4th Oct 2025548 AMAQI
4th Oct 2025559 AMAQI
4th Oct 20255310 AMAQI
4th Oct 20255411 AMAQI
4th Oct 20255612 PMAQI
4th Oct 2025561 PMAQI
4th Oct 2025692 PMAQI
4th Oct 2025693 PMAQI
4th Oct 2025654 PMAQI
4th Oct 2025655 PMAQI
4th Oct 2025566 PMAQI
4th Oct 2025567 PMAQI
4th Oct 2025578 PMAQI
4th Oct 2025599 PMAQI
4th Oct 20256310 PMAQI
4th Oct 20256711 PMAQI
5th Oct 20256512 AMAQI
5th Oct 2025611 AMAQI
5th Oct 2025622 AMAQI
5th Oct 2025613 AMAQI
5th Oct 2025584 AMAQI
5th Oct 2025595 AMAQI
5th Oct 2025586 AMAQI
16°C12/23°C
5th Oct 2025597 AMAQI
5th Oct 2025568 AMAQI
5th Oct 2025569 AMAQI
5th Oct 20255510 AMAQI
5th Oct 20255811 AMAQI
5th Oct 20256112 PMAQI
5th Oct 2025671 PMAQI
5th Oct 2025682 PMAQI
5th Oct 2025683 PMAQI
5th Oct 2025684 PMAQI
5th Oct 2025705 PMAQI
5th Oct 2025636 PMAQI
5th Oct 2025567 PMAQI
5th Oct 2025558 PMAQI
5th Oct 2025669 PMAQI
5th Oct 20256510 PMAQI
5th Oct 20257011 PMAQI
6th Oct 20256712 AMAQI
6th Oct 2025701 AMAQI
6th Oct 2025612 AMAQI
6th Oct 2025543 AMAQI
6th Oct 2025534 AMAQI
6th Oct 2025525 AMAQI
6th Oct 2025586 AMAQI
17°C12/26°C
6th Oct 2025547 AMAQI
6th Oct 2025528 AMAQI
6th Oct 2025649 AMAQI
6th Oct 20255810 AMAQI
7th Oct 2025514 AMAQI
7th Oct 2025265 AMAQI
7th Oct 2025506 AMAQI
20°C13/31°C
7th Oct 2025577 AMAQI
7th Oct 2025448 AMAQI
7th Oct 2025539 AMAQI
7th Oct 20255110 AMAQI
7th Oct 20256111 AMAQI
7th Oct 20255912 PMAQI
7th Oct 2025661 PMAQI
7th Oct 2025762 PMAQI
7th Oct 2025783 PMAQI
7th Oct 2025794 PMAQI
7th Oct 2025655 PMAQI
7th Oct 2025636 PMAQI
7th Oct 2025657 PMAQI
7th Oct 2025648 PMAQI
7th Oct 2025769 PMAQI
7th Oct 20256510 PMAQI
7th Oct 20257211 PMAQI
8th Oct 20256612 AMAQI
8th Oct 2025671 AMAQI
8th Oct 2025582 AMAQI
8th Oct 2025573 AMAQI
8th Oct 2025584 AMAQI
8th Oct 2025535 AMAQI
8th Oct 2025656 AMAQI
19°C14/27°C
8th Oct 2025567 AMAQI
8th Oct 2025568 AMAQI
8th Oct 2025599 AMAQI
8th Oct 20255910 AMAQI
8th Oct 20256211 AMAQI
8th Oct 20256112 PMAQI
8th Oct 2025601 PMAQI
8th Oct 2025532 PMAQI
8th Oct 2025603 PMAQI
8th Oct 2025574 PMAQI
8th Oct 2025615 PMAQI
8th Oct 2025616 PMAQI
8th Oct 2025567 PMAQI
8th Oct 2025518 PMAQI
8th Oct 2025599 PMAQI
8th Oct 20256210 PMAQI
8th Oct 20256211 PMAQI
9th Oct 20255912 AMAQI
9th Oct 2025541 AMAQI
9th Oct 2025522 AMAQI
9th Oct 2025553 AMAQI
9th Oct 2025584 AMAQI
9th Oct 2025545 AMAQI
9th Oct 2025566 AMAQI
17°C14/23°C
9th Oct 2025577 AMAQI
9th Oct 2025538 AMAQI
9th Oct 2025549 AMAQI
9th Oct 20255410 AMAQI
9th Oct 20255611 AMAQI
9th Oct 20255412 PMAQI
9th Oct 2025411 PMAQI
9th Oct 2025502 PMAQI
9th Oct 2025533 PMAQI
9th Oct 2025524 PMAQI
9th Oct 2025545 PMAQI
9th Oct 2025606 PMAQI
9th Oct 2025547 PMAQI
9th Oct 2025498 PMAQI
9th Oct 2025679 PMAQI
9th Oct 20256110 PMAQI
9th Oct 20255711 PMAQI
10th Oct 20255512 AMAQI
10th Oct 2025581 AMAQI
10th Oct 2025562 AMAQI
10th Oct 2025543 AMAQI
10th Oct 2025554 AMAQI
10th Oct 2025585 AMAQI
10th Oct 2025546 AMAQI
17°C15/20°C
10th Oct 2025587 AMAQI
10th Oct 2025598 AMAQI
10th Oct 2025569 AMAQI
10th Oct 20255710 AMAQI
10th Oct 20255811 AMAQI
10th Oct 20254812 PMAQI
10th Oct 2025461 PMAQI
10th Oct 2025482 PMAQI
10th Oct 2025543 PMAQI
10th Oct 2025474 PMAQI
10th Oct 2025385 PMAQI
10th Oct 2025406 PMAQI
10th Oct 2025527 PMAQI
10th Oct 2025408 PMAQI
10th Oct 2025599 PMAQI
10th Oct 20256010 PMAQI
10th Oct 20255311 PMAQI
11th Oct 20255512 AMAQI
11th Oct 2025581 AMAQI
11th Oct 2025592 AMAQI
11th Oct 2025583 AMAQI
11th Oct 2025574 AMAQI
11th Oct 2025585 AMAQI
11th Oct 2025446 AMAQI
16°C12/24°C
11th Oct 2025257 AMAQI
11th Oct 2025508 AMAQI
11th Oct 2025539 AMAQI
11th Oct 20255410 AMAQI
11th Oct 20255411 AMAQI
11th Oct 20255112 PMAQI
11th Oct 2025431 PMAQI
11th Oct 2025402 PMAQI
11th Oct 2025583 PMAQI
11th Oct 2025544 PMAQI
11th Oct 2025535 PMAQI
11th Oct 2025506 PMAQI
11th Oct 2025387 PMAQI
11th Oct 2025508 PMAQI
11th Oct 2025479 PMAQI
11th Oct 20254610 PMAQI
11th Oct 20255411 PMAQI
12th Oct 20254412 AMAQI
12th Oct 2025431 AMAQI
12th Oct 2025472 AMAQI
12th Oct 2025553 AMAQI
12th Oct 2025494 AMAQI
12th Oct 2025405 AMAQI
12th Oct 2025326 AMAQI
16°C12/22°C
12th Oct 2025407 AMAQI
12th Oct 2025448 AMAQI
12th Oct 2025429 AMAQI
12th Oct 20255610 AMAQI
12th Oct 20255211 AMAQI
12th Oct 20255412 PMAQI
12th Oct 2025551 PMAQI
12th Oct 2025482 PMAQI
12th Oct 2025473 PMAQI
12th Oct 2025464 PMAQI
12th Oct 2025515 PMAQI
12th Oct 2025506 PMAQI
12th Oct 2025527 PMAQI
12th Oct 2025538 PMAQI
12th Oct 2025569 PMAQI
12th Oct 20256810 PMAQI
12th Oct 20257211 PMAQI
13th Oct 20256712 AMAQI
13th Oct 2025671 AMAQI
13th Oct 2025622 AMAQI
13th Oct 2025603 AMAQI
13th Oct 2025594 AMAQI
13th Oct 2025565 AMAQI
13th Oct 2025556 AMAQI
16°C11/24°C
13th Oct 2025587 AMAQI
13th Oct 2025638 AMAQI
13th Oct 2025609 AMAQI
13th Oct 20255410 AMAQI
13th Oct 20254511 AMAQI
13th Oct 20255012 PMAQI
13th Oct 2025571 PMAQI
13th Oct 2025502 PMAQI
13th Oct 2025383 PMAQI
13th Oct 2025404 PMAQI
13th Oct 2025505 PMAQI
13th Oct 2025416 PMAQI
13th Oct 2025377 PMAQI
13th Oct 2025498 PMAQI
13th Oct 2025449 PMAQI
13th Oct 20254610 PMAQI
13th Oct 20256311 PMAQI
14th Oct 20255212 AMAQI
14th Oct 2025551 AMAQI
14th Oct 2025562 AMAQI
14th Oct 2025483 AMAQI
14th Oct 2025324 AMAQI
14th Oct 2025395 AMAQI
14th Oct 2025376 AMAQI
14°C11/18°C
14th Oct 2025397 AMAQI
14th Oct 2025458 AMAQI
14th Oct 2025469 AMAQI
14th Oct 20253210 AMAQI
14th Oct 20254911 AMAQI
14th Oct 20255212 PMAQI
14th Oct 2025521 PMAQI
14th Oct 2025402 PMAQI
14th Oct 2025403 PMAQI
14th Oct 2025374 PMAQI
14th Oct 2025285 PMAQI
14th Oct 2025406 PMAQI
14th Oct 2025467 PMAQI
14th Oct 2025288 PMAQI
14th Oct 2025479 PMAQI
14th Oct 20255810 PMAQI
14th Oct 20254911 PMAQI
15th Oct 20254712 AMAQI
15th Oct 2025441 AMAQI
15th Oct 2025472 AMAQI
15th Oct 2025393 AMAQI
15th Oct 2025474 AMAQI
15th Oct 2025455 AMAQI
15th Oct 2025496 AMAQI
13°C10/18°C
15th Oct 2025487 AMAQI
15th Oct 2025458 AMAQI
15th Oct 2025519 AMAQI
15th Oct 20253910 AMAQI
15th Oct 20254811 AMAQI
15th Oct 20254612 PMAQI
15th Oct 2025531 PMAQI
15th Oct 2025462 PMAQI
15th Oct 2025433 PMAQI
15th Oct 2025464 PMAQI
15th Oct 2025515 PMAQI
15th Oct 2025386 PMAQI
15th Oct 2025487 PMAQI
15th Oct 2025548 PMAQI
15th Oct 2025539 PMAQI
15th Oct 20255410 PMAQI
15th Oct 20256411 PMAQI
16th Oct 20255812 AMAQI
16th Oct 2025591 AMAQI
16th Oct 2025572 AMAQI
16th Oct 2025583 AMAQI
16th Oct 2025604 AMAQI
16th Oct 2025595 AMAQI
16th Oct 2025516 AMAQI
14°C12/19°C
16th Oct 2025517 AMAQI
16th Oct 2025538 AMAQI
16th Oct 2025549 AMAQI
16th Oct 20255610 AMAQI
16th Oct 20256111 AMAQI
16th Oct 20255512 PMAQI
16th Oct 2025511 PMAQI
16th Oct 2025552 PMAQI
16th Oct 2025653 PMAQI
16th Oct 2025644 PMAQI
16th Oct 2025615 PMAQI
16th Oct 2025556 PMAQI
16th Oct 2025567 PMAQI
16th Oct 2025638 PMAQI
16th Oct 2025629 PMAQI
16th Oct 20256210 PMAQI
16th Oct 20255911 PMAQI
17th Oct 20255812 AMAQI
17th Oct 2025631 AMAQI
17th Oct 2025652 AMAQI
17th Oct 2025643 AMAQI
17th Oct 2025614 AMAQI
17th Oct 2025565 AMAQI
17th Oct 2025596 AMAQI
14°C10/21°C
17th Oct 2025597 AMAQI
17th Oct 2025558 AMAQI
17th Oct 2025609 AMAQI
17th Oct 20256010 AMAQI
17th Oct 20255711 AMAQI
17th Oct 20256412 PMAQI
17th Oct 2025641 PMAQI
17th Oct 2025632 PMAQI
17th Oct 2025863 PMAQI
17th Oct 2025714 PMAQI
17th Oct 2025605 PMAQI
17th Oct 2025636 PMAQI
17th Oct 2025547 PMAQI
17th Oct 2025578 PMAQI
17th Oct 2025739 PMAQI
17th Oct 20257810 PMAQI
17th Oct 20258111 PMAQI
18th Oct 20257112 AMAQI
18th Oct 2025701 AMAQI
18th Oct 2025682 AMAQI
18th Oct 2025633 AMAQI
18th Oct 2025644 AMAQI
18th Oct 2025625 AMAQI
18th Oct 2025606 AMAQI
16°C10/25°C
18th Oct 2025557 AMAQI
18th Oct 2025548 AMAQI
18th Oct 2025549 AMAQI
18th Oct 20256310 AMAQI
18th Oct 20256411 AMAQI
18th Oct 20256512 PMAQI
18th Oct 2025851 PMAQI
18th Oct 2025842 PMAQI
18th Oct 2025793 PMAQI
18th Oct 2025694 PMAQI
18th Oct 2025805 PMAQI
18th Oct 2025786 PMAQI
18th Oct 2025617 PMAQI
18th Oct 2025608 PMAQI
18th Oct 2025709 PMAQI
18th Oct 20257810 PMAQI
18th Oct 20258211 PMAQI
19th Oct 20258512 AMAQI
19th Oct 2025881 AMAQI
19th Oct 2025942 AMAQI
19th Oct 2025943 AMAQI
19th Oct 2025924 AMAQI
19th Oct 2025855 AMAQI
19th Oct 2025646 AMAQI
18°C12/28°C
19th Oct 2025667 AMAQI
7 AM19th Oct 2025628 AMAQI
19th Oct 2025559 AMAQI
12 PM
6 PM
12 AM
6 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 5 PM
49AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
7 AM - 10 AM
45AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 5 PM (Avg. 49), while the lowest AQI was between 7 AM to 10 AM (Avg. 45).
Night time
Avg. Highest Time
11 PM
53AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM - 8 PM
47AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 PM to 11 PM (Avg. 53), while the lowest AQI was between 5 AM to 8 PM (Avg. 47).
2025 Days Vs Air Quality
San Francisco, California, United States
2025
90%
262
10%
29
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Good
262 DaysModerate
29 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 292 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
San Francisco, 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
55AQI
55AQI
2nd January 2025
42AQI
42AQI
3rd January 2025
44AQI
44AQI
4th January 2025
36AQI
36AQI
5th January 2025
40AQI
40AQI
6th January 2025
38AQI
38AQI
7th January 2025
26AQI
26AQI
8th January 2025
29AQI
29AQI
9th January 2025
48AQI
48AQI
10th January 2025
42AQI
42AQI
11th January 2025
31AQI
31AQI
12th January 2025
26AQI
26AQI
13th January 2025
30AQI
30AQI
14th January 2025
33AQI
33AQI
15th January 2025
50AQI
50AQI
16th January 2025
59AQI
59AQI
17th January 2025
47AQI
47AQI
18th January 2025
48AQI
48AQI
19th January 2025
50AQI
50AQI
20th January 2025
40AQI
40AQI
21st January 2025
40AQI
40AQI
22nd January 2025
52AQI
52AQI
23rd January 2025
48AQI
48AQI
24th January 2025
61AQI
61AQI
25th January 2025
47AQI
47AQI
26th January 2025
36AQI
36AQI
27th January 2025
41AQI
41AQI
28th January 2025
40AQI
40AQI
29th January 2025
34AQI
34AQI
30th January 2025
34AQI
34AQI
31st January 2025
36AQI
36AQI
1st February 2025
27AQI
27AQI
2nd February 2025
24AQI
24AQI
3rd February 2025
22AQI
22AQI
4th February 2025
21AQI
21AQI
5th February 2025
25AQI
25AQI
6th February 2025
23AQI
23AQI
7th February 2025
24AQI
24AQI
8th February 2025
25AQI
25AQI
9th February 2025
28AQI
28AQI
10th February 2025
29AQI
29AQI
11th February 2025
30AQI
30AQI
12th February 2025
26AQI
26AQI
13th February 2025
27AQI
27AQI
14th February 2025
30AQI
30AQI
15th February 2025
29AQI
29AQI
16th February 2025
34AQI
34AQI
17th February 2025
23AQI
23AQI
18th February 2025
26AQI
26AQI
19th February 2025
28AQI
28AQI
20th February 2025
29AQI
29AQI
21st February 2025
37AQI
37AQI
22nd February 2025
37AQI
37AQI
23rd February 2025
28AQI
28AQI
24th February 2025
21AQI
21AQI
25th February 2025
27AQI
27AQI
26th February 2025
41AQI
41AQI
27th February 2025
37AQI
37AQI
28th February 2025
52AQI
52AQI
1st March 2025
28AQI
28AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
24AQI
24AQI
4th March 2025
22AQI
22AQI
5th March 2025
25AQI
25AQI
6th March 2025
27AQI
27AQI
7th March 2025
36AQI
36AQI
8th March 2025
37AQI
37AQI
9th March 2025
37AQI
37AQI
10th March 2025
30AQI
30AQI
11th March 2025
30AQI
30AQI
12th March 2025
25AQI
25AQI
13th March 2025
21AQI
21AQI
14th March 2025
24AQI
24AQI
15th March 2025
55AQI
55AQI
16th March 2025
38AQI
38AQI
17th March 2025
19AQI
19AQI
18th March 2025
21AQI
21AQI
19th March 2025
24AQI
24AQI
20th March 2025
19AQI
19AQI
21st March 2025
28AQI
28AQI
22nd March 2025
22AQI
22AQI
23rd March 2025
32AQI
32AQI
24th March 2025
24AQI
24AQI
25th March 2025
31AQI
31AQI
26th March 2025
20AQI
20AQI
27th March 2025
21AQI
21AQI
28th March 2025
28AQI
28AQI
29th March 2025
21AQI
21AQI
30th March 2025
23AQI
23AQI
31st March 2025
25AQI
25AQI
1st April 2025
23AQI
23AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
21AQI
21AQI
4th April 2025
24AQI
24AQI
5th April 2025
26AQI
26AQI
6th April 2025
18AQI
18AQI
7th April 2025
14AQI
14AQI
8th April 2025
17AQI
17AQI
9th April 2025
23AQI
23AQI
10th April 2025
20AQI
20AQI
11th April 2025
22AQI
22AQI
12th April 2025
35AQI
35AQI
13th April 2025
44AQI
44AQI
14th April 2025
32AQI
32AQI
15th April 2025
31AQI
31AQI
16th April 2025
30AQI
30AQI
17th April 2025
23AQI
23AQI
18th April 2025
27AQI
27AQI
19th April 2025
33AQI
33AQI
20th April 2025
28AQI
28AQI
21st April 2025
42AQI
42AQI
22nd April 2025
37AQI
37AQI
23rd April 2025
52AQI
52AQI
24th April 2025
38AQI
38AQI
25th April 2025
20AQI
20AQI
26th April 2025
16AQI
16AQI
27th April 2025
29AQI
29AQI
28th April 2025
33AQI
33AQI
29th April 2025
44AQI
44AQI
30th April 2025
48AQI
48AQI
1st May 2025
40AQI
40AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
26AQI
26AQI
4th May 2025
40AQI
40AQI
5th May 2025
33AQI
33AQI
6th May 2025
51AQI
51AQI
7th May 2025
46AQI
46AQI
8th May 2025
22AQI
22AQI
9th May 2025
41AQI
41AQI
10th May 2025
35AQI
35AQI
11th May 2025
27AQI
27AQI
12th May 2025
18AQI
18AQI
13th May 2025
17AQI
17AQI
14th May 2025
38AQI
38AQI
15th May 2025
44AQI
44AQI
16th May 2025
47AQI
47AQI
17th May 2025
43AQI
43AQI
18th May 2025
43AQI
43AQI
19th May 2025
45AQI
45AQI
20th May 2025
41AQI
41AQI
21st May 2025
48AQI
48AQI
22nd May 2025
38AQI
38AQI
23rd May 2025
31AQI
31AQI
24th May 2025
38AQI
38AQI
25th May 2025
23AQI
23AQI
26th May 2025
19AQI
19AQI
27th May 2025
35AQI
35AQI
28th May 2025
29AQI
29AQI
29th May 2025
23AQI
23AQI
30th May 2025
33AQI
33AQI
31st May 2025
51AQI
51AQI
1st June 2025
53AQI
53AQI
2nd June 2025
48AQI
48AQI
3rd June 2025
38AQI
38AQI
4th June 2025
52AQI
52AQI
5th June 2025
30AQI
30AQI
6th June 2025
28AQI
28AQI
7th June 2025
23AQI
23AQI
8th June 2025
18AQI
18AQI
9th June 2025
17AQI
17AQI
10th June 2025
22AQI
22AQI
11th June 2025
46AQI
46AQI
12th June 2025
51AQI
51AQI
13th June 2025
50AQI
50AQI
14th June 2025
50AQI
50AQI
15th June 2025
53AQI
53AQI
16th June 2025
45AQI
45AQI
17th June 2025
41AQI
41AQI
18th June 2025
41AQI
41AQI
19th June 2025
52AQI
52AQI
20th June 2025
48AQI
48AQI
21st June 2025
46AQI
46AQI
22nd June 2025
46AQI
46AQI
23rd June 2025
39AQI
39AQI
24th June 2025
25AQI
25AQI
25th June 2025
20AQI
20AQI
26th June 2025
28AQI
28AQI
27th June 2025
36AQI
36AQI
28th June 2025
33AQI
33AQI
29th June 2025
26AQI
26AQI
30th June 2025
21AQI
21AQI
1st July 2025
20AQI
20AQI
2nd July 2025
19AQI
19AQI
3rd July 2025
36AQI
36AQI
4th July 2025
32AQI
32AQI
5th July 2025
36AQI
36AQI
6th July 2025
32AQI
32AQI
7th July 2025
24AQI
24AQI
8th July 2025
19AQI
19AQI
9th July 2025
17AQI
17AQI
10th July 2025
20AQI
20AQI
11th July 2025
27AQI
27AQI
12th July 2025
27AQI
27AQI
13th July 2025
23AQI
23AQI
14th July 2025
18AQI
18AQI
15th July 2025
18AQI
18AQI
16th July 2025
20AQI
20AQI
17th July 2025
17AQI
17AQI
18th July 2025
17AQI
17AQI
19th July 2025
19AQI
19AQI
20th July 2025
22AQI
22AQI
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
15AQI
15AQI
28th July 2025
20AQI
20AQI
29th July 2025
26AQI
26AQI
30th July 2025
24AQI
24AQI
31st July 2025
22AQI
22AQI
1st August 2025
23AQI
23AQI
2nd August 2025
20AQI
20AQI
3rd August 2025
38AQI
38AQI
4th August 2025
40AQI
40AQI
5th August 2025
32AQI
32AQI
6th August 2025
38AQI
38AQI
7th August 2025
29AQI
29AQI
8th August 2025
39AQI
39AQI
9th August 2025
33AQI
33AQI
10th August 2025
24AQI
24AQI
11th August 2025
26AQI
26AQI
12th August 2025
27AQI
27AQI
13th August 2025
21AQI
21AQI
14th August 2025
19AQI
19AQI
15th August 2025
40AQI
40AQI
16th August 2025
19AQI
19AQI
17th August 2025
15AQI
15AQI
18th August 2025
18AQI
18AQI
19th August 2025
25AQI
25AQI
20th August 2025
30AQI
30AQI
21st August 2025
51AQI
51AQI
22nd August 2025
47AQI
47AQI
23rd August 2025
30AQI
30AQI
24th August 2025
23AQI
23AQI
25th August 2025
28AQI
28AQI
26th August 2025
33AQI
33AQI
27th August 2025
41AQI
41AQI
28th August 2025
33AQI
33AQI
29th August 2025
26AQI
26AQI
30th August 2025
33AQI
33AQI
31st August 2025
42AQI
42AQI
1st September 2025
32AQI
32AQI
2nd September 2025
44AQI
44AQI
3rd September 2025
29AQI
29AQI
4th September 2025
26AQI
26AQI
5th September 2025
23AQI
23AQI
6th September 2025
27AQI
27AQI
7th September 2025
24AQI
24AQI
8th September 2025
20AQI
20AQI
9th September 2025
17AQI
17AQI
10th September 2025
19AQI
19AQI
11th September 2025
34AQI
34AQI
12th September 2025
30AQI
30AQI
13th September 2025
30AQI
30AQI
14th September 2025
22AQI
22AQI
15th September 2025
23AQI
23AQI
16th September 2025
33AQI
33AQI
17th September 2025
26AQI
26AQI
18th September 2025
34AQI
34AQI
19th September 2025
37AQI
37AQI
20th September 2025
38AQI
38AQI
21st September 2025
32AQI
32AQI
22nd September 2025
36AQI
36AQI
23rd September 2025
43AQI
43AQI
24th September 2025
48AQI
48AQI
25th September 2025
40AQI
40AQI
26th September 2025
55AQI
55AQI
27th September 2025
58AQI
58AQI
28th September 2025
44AQI
44AQI
29th September 2025
26AQI
26AQI
30th September 2025
17AQI
17AQI
1st October 2025
35AQI
35AQI
2nd October 2025
46AQI
46AQI
3rd October 2025
46AQI
46AQI
4th October 2025
60AQI
60AQI
5th October 2025
61AQI
61AQI
6th October 2025
62AQI
62AQI
7th October 2025
61AQI
61AQI
8th October 2025
59AQI
59AQI
9th October 2025
55AQI
55AQI
10th October 2025
53AQI
53AQI
11th October 2025
52AQI
52AQI
12th October 2025
50AQI
50AQI
13th October 2025
54AQI
54AQI
14th October 2025
45AQI
45AQI
15th October 2025
47AQI
47AQI
16th October 2025
58AQI
58AQI
17th October 2025
64AQI
64AQI
18th October 2025
67AQI
67AQI
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
41AQI
29AQI
27AQI
29AQI
35AQI
38AQI
22AQI
30AQI
32AQI
54AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202533AQI
27
4
27
1
30
1
29
1
29
2
25
5
31
30
1
28
2
6
12
262
29
Highest AQI recorded in
October54AQI
Lowest AQI recorded in
July22AQI
202437AQI
25
1
26
31
30
29
2
25
3
30
1
16
6
2
7
26
3
26
5
27
3
20
11
311
35
2
7
Highest AQI recorded in
August80AQI
Lowest AQI recorded in
March25AQI
202330AQI
31
27
1
31
30
29
2
30
31
31
21
4
1
20
26
3
26
5
333
15
1
Highest AQI recorded in
September39AQI
Lowest AQI recorded in
August19AQI
202234AQI
21
9
19
3
31
26
4
28
3
30
23
2
25
4
30
1
28
2
22
9
285
35
Highest AQI recorded in
January41AQI
Lowest AQI recorded in
July22AQI
202136AQI
21
9
28
29
1
23
6
25
6
26
4
31
27
4
25
5
31
22
8
23
3
5
311
46
5
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
July26AQI
202042AQI
13
19
1
18
24
6
29
2
19
11
1
13
12
5
21
7
2
21
3
23
5
200
47
3
5
Highest AQI recorded in
September71AQI
Lowest AQI recorded in
March29AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
42AQILeast Polluted Year Recorded
2023(Avg.)
30AQISan Francisco's annual 2025 AQI (33) shows an average percentage change of -6.5% (improved AQI) compared to previous years: 2020 (42), 2021 (36), 2022 (34), 2023 (30), 2024 (37).
