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+
August Air Quality Analysis
San Francisco, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
14th Aug 2024
196AQILowest AQI recorded on
14th Aug 2023
12AQISame Day Analysis (23rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 31 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 23rd Aug - 24th Aug 2025
San Francisco, California, United States
AQI
Day
Night
.
6 AM23rd Aug 2025
8 PM
5 AM24th Aug 2025
Day time
Avg. Highest Time
6AM23rd Aug
43AQI
Avg. Lowest Time
10AM23rd Aug
19AQI
Night time
Avg. Highest Time
9PM23rd Aug
31AQI
Avg. Lowest Time
5AM24th Aug
21AQI
In the last 24 hours,
San Francisco's AQI reached its highest point of 43 at 6 AM during the Day, while the lowest point, 19, was recorded at 10 AM during the Day between 23rd Aug and 24th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
San Francisco, California, United States
JulAug
25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th
Day
Night
25th Jul 2025126 AMAQI
25th Jul 2025147 AMAQI
25th Jul 2025168 AMAQI
25th Jul 2025169 AMAQI
25th Jul 20251710 AMAQI
25th Jul 20251611 AMAQI
25th Jul 20251412 PMAQI
25th Jul 2025141 PMAQI
25th Jul 2025142 PMAQI
25th Jul 2025153 PMAQI
25th Jul 2025164 PMAQI
25th Jul 2025155 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025147 PMAQI
25th Jul 2025148 PMAQI
25th Jul 2025159 PMAQI
25th Jul 20251610 PMAQI
25th Jul 20251611 PMAQI
26th Jul 20251612 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025152 AMAQI
26th Jul 2025153 AMAQI
26th Jul 2025144 AMAQI
26th Jul 2025135 AMAQI
15°C14/16°C
26th Jul 2025136 AMAQI
26th Jul 2025127 AMAQI
26th Jul 2025138 AMAQI
26th Jul 2025139 AMAQI
26th Jul 20251410 AMAQI
26th Jul 20251411 AMAQI
26th Jul 20251612 PMAQI
26th Jul 2025141 PMAQI
26th Jul 2025142 PMAQI
26th Jul 2025153 PMAQI
26th Jul 2025144 PMAQI
26th Jul 2025145 PMAQI
26th Jul 2025166 PMAQI
26th Jul 2025167 PMAQI
26th Jul 2025158 PMAQI
26th Jul 2025159 PMAQI
26th Jul 20251410 PMAQI
26th Jul 20251511 PMAQI
27th Jul 20251412 AMAQI
27th Jul 2025151 AMAQI
27th Jul 2025152 AMAQI
27th Jul 2025153 AMAQI
27th Jul 2025144 AMAQI
27th Jul 2025145 AMAQI
15°C14/16°C
27th Jul 2025146 AMAQI
27th Jul 2025167 AMAQI
27th Jul 2025148 AMAQI
27th Jul 2025139 AMAQI
27th Jul 20251410 AMAQI
27th Jul 20251511 AMAQI
27th Jul 20251412 PMAQI
27th Jul 2025141 PMAQI
27th Jul 2025142 PMAQI
27th Jul 2025153 PMAQI
27th Jul 2025154 PMAQI
27th Jul 2025155 PMAQI
27th Jul 2025166 PMAQI
27th Jul 2025167 PMAQI
27th Jul 2025178 PMAQI
27th Jul 2025209 PMAQI
27th Jul 20251810 PMAQI
27th Jul 20251811 PMAQI
28th Jul 20252112 AMAQI
28th Jul 2025191 AMAQI
28th Jul 2025172 AMAQI
28th Jul 2025183 AMAQI
28th Jul 2025174 AMAQI
28th Jul 2025145 AMAQI
15°C14/16°C
28th Jul 2025166 AMAQI
28th Jul 2025177 AMAQI
28th Jul 2025178 AMAQI
28th Jul 2025189 AMAQI
28th Jul 20251810 AMAQI
28th Jul 20251811 AMAQI
28th Jul 20252212 PMAQI
28th Jul 2025241 PMAQI
28th Jul 2025222 PMAQI
28th Jul 2025203 PMAQI
28th Jul 2025204 PMAQI
28th Jul 2025225 PMAQI
28th Jul 2025226 PMAQI
28th Jul 2025217 PMAQI
28th Jul 2025218 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252410 PMAQI
28th Jul 20252211 PMAQI
29th Jul 20252112 AMAQI
29th Jul 2025201 AMAQI
29th Jul 2025242 AMAQI
29th Jul 2025253 AMAQI
29th Jul 2025304 AMAQI
29th Jul 2025325 AMAQI
15°C13/17°C
29th Jul 2025286 AMAQI
29th Jul 2025247 AMAQI
29th Jul 2025238 AMAQI
29th Jul 2025259 AMAQI
29th Jul 20252710 AMAQI
29th Jul 20252711 AMAQI
29th Jul 20252712 PMAQI
29th Jul 2025301 PMAQI
29th Jul 2025282 PMAQI
29th Jul 2025243 PMAQI
29th Jul 2025254 PMAQI
29th Jul 2025265 PMAQI
29th Jul 2025296 PMAQI
29th Jul 2025297 PMAQI
29th Jul 2025278 PMAQI
29th Jul 2025259 PMAQI
29th Jul 20252310 PMAQI
29th Jul 20252711 PMAQI
30th Jul 20252912 AMAQI
30th Jul 2025261 AMAQI
30th Jul 2025232 AMAQI
30th Jul 2025233 AMAQI
30th Jul 2025234 AMAQI
30th Jul 2025285 AMAQI
14°C13/16°C
30th Jul 2025246 AMAQI
30th Jul 2025257 AMAQI
30th Jul 2025218 AMAQI
30th Jul 2025229 AMAQI
30th Jul 20252210 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252112 PMAQI
30th Jul 2025211 PMAQI
30th Jul 2025242 PMAQI
30th Jul 2025243 PMAQI
30th Jul 2025244 PMAQI
30th Jul 2025245 PMAQI
30th Jul 2025246 PMAQI
30th Jul 2025247 PMAQI
30th Jul 2025248 PMAQI
30th Jul 2025259 PMAQI
30th Jul 20252810 PMAQI
30th Jul 20252811 PMAQI
31st Jul 20252712 AMAQI
31st Jul 2025251 AMAQI
31st Jul 2025242 AMAQI
31st Jul 2025233 AMAQI
31st Jul 2025184 AMAQI
31st Jul 2025165 AMAQI
14°C13/15°C
31st Jul 2025166 AMAQI
31st Jul 2025197 AMAQI
31st Jul 2025188 AMAQI
31st Jul 2025189 AMAQI
31st Jul 20251510 AMAQI
31st Jul 20251811 AMAQI
31st Jul 20251912 PMAQI
31st Jul 2025201 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025253 PMAQI
31st Jul 2025244 PMAQI
31st Jul 2025235 PMAQI
31st Jul 2025226 PMAQI
31st Jul 2025227 PMAQI
31st Jul 2025258 PMAQI
31st Jul 2025279 PMAQI
31st Jul 20252610 PMAQI
31st Jul 20252811 PMAQI
1st Aug 20253012 AMAQI
1st Aug 2025241 AMAQI
1st Aug 2025292 AMAQI
1st Aug 2025233 AMAQI
1st Aug 2025234 AMAQI
1st Aug 2025205 AMAQI
15°C13/17°C
1st Aug 2025186 AMAQI
1st Aug 2025197 AMAQI
1st Aug 2025188 AMAQI
1st Aug 2025189 AMAQI
1st Aug 20251710 AMAQI
1st Aug 20251811 AMAQI
1st Aug 20251912 PMAQI
1st Aug 2025191 PMAQI
1st Aug 2025202 PMAQI
1st Aug 2025233 PMAQI
1st Aug 2025234 PMAQI
1st Aug 2025265 PMAQI
1st Aug 2025276 PMAQI
1st Aug 2025207 PMAQI
1st Aug 2025248 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252410 PMAQI
1st Aug 20252711 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025281 AMAQI
2nd Aug 2025232 AMAQI
2nd Aug 2025233 AMAQI
2nd Aug 2025204 AMAQI
2nd Aug 2025205 AMAQI
14°C13/16°C
2nd Aug 2025206 AMAQI
2nd Aug 2025217 AMAQI
2nd Aug 2025188 AMAQI
2nd Aug 2025179 AMAQI
2nd Aug 20251610 AMAQI
2nd Aug 20251811 AMAQI
2nd Aug 20251712 PMAQI
2nd Aug 2025151 PMAQI
2nd Aug 2025142 PMAQI
2nd Aug 2025183 PMAQI
2nd Aug 2025194 PMAQI
2nd Aug 2025205 PMAQI
2nd Aug 2025206 PMAQI
2nd Aug 2025207 PMAQI
2nd Aug 2025188 PMAQI
2nd Aug 2025189 PMAQI
2nd Aug 20251710 PMAQI
2nd Aug 20252011 PMAQI
3rd Aug 20252512 AMAQI
3rd Aug 2025331 AMAQI
3rd Aug 2025342 AMAQI
3rd Aug 2025343 AMAQI
3rd Aug 2025284 AMAQI
3rd Aug 2025205 AMAQI
14°C13/17°C
3rd Aug 2025216 AMAQI
3rd Aug 2025227 AMAQI
3rd Aug 2025398 AMAQI
3rd Aug 2025379 AMAQI
3rd Aug 20253910 AMAQI
3rd Aug 20253811 AMAQI
3rd Aug 20254212 PMAQI
3rd Aug 2025461 PMAQI
3rd Aug 2025442 PMAQI
3rd Aug 2025483 PMAQI
3rd Aug 2025504 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025496 PMAQI
3rd Aug 2025387 PMAQI
3rd Aug 2025438 PMAQI
3rd Aug 2025469 PMAQI
3rd Aug 20255010 PMAQI
3rd Aug 20254811 PMAQI
4th Aug 20254612 AMAQI
4th Aug 2025411 AMAQI
4th Aug 2025392 AMAQI
4th Aug 2025383 AMAQI
4th Aug 2025404 AMAQI
4th Aug 2025415 AMAQI
14°C12/17°C
4th Aug 2025396 AMAQI
4th Aug 2025377 AMAQI
4th Aug 2025368 AMAQI
4th Aug 2025419 AMAQI
4th Aug 20254610 AMAQI
4th Aug 20254611 AMAQI
4th Aug 20254612 PMAQI
4th Aug 2025401 PMAQI
4th Aug 2025432 PMAQI
4th Aug 2025453 PMAQI
4th Aug 2025394 PMAQI
4th Aug 2025345 PMAQI
4th Aug 2025366 PMAQI
4th Aug 2025447 PMAQI
4th Aug 2025388 PMAQI
4th Aug 2025349 PMAQI
4th Aug 20253310 PMAQI
4th Aug 20253311 PMAQI
5th Aug 20253412 AMAQI
5th Aug 2025341 AMAQI
5th Aug 2025322 AMAQI
5th Aug 2025313 AMAQI
5th Aug 2025294 AMAQI
5th Aug 2025265 AMAQI
14°C12/16°C
5th Aug 2025256 AMAQI
5th Aug 2025247 AMAQI
5th Aug 2025258 AMAQI
5th Aug 2025259 AMAQI
5th Aug 20253110 AMAQI
5th Aug 20253411 AMAQI
5th Aug 20254012 PMAQI
5th Aug 2025361 PMAQI
5th Aug 2025342 PMAQI
5th Aug 2025323 PMAQI
5th Aug 2025364 PMAQI
5th Aug 2025385 PMAQI
5th Aug 2025396 PMAQI
5th Aug 2025347 PMAQI
5th Aug 2025328 PMAQI
5th Aug 2025329 PMAQI
5th Aug 20253110 PMAQI
5th Aug 20252711 PMAQI
6th Aug 20252712 AMAQI
6th Aug 2025261 AMAQI
6th Aug 2025322 AMAQI
6th Aug 2025343 AMAQI
6th Aug 2025334 AMAQI
6th Aug 2025335 AMAQI
13°C12/16°C
6th Aug 2025326 AMAQI
6th Aug 2025317 AMAQI
6th Aug 2025318 AMAQI
6th Aug 2025339 AMAQI
6th Aug 20253510 AMAQI
6th Aug 20253611 AMAQI
6th Aug 20254312 PMAQI
6th Aug 2025501 PMAQI
6th Aug 2025522 PMAQI
6th Aug 2025523 PMAQI
6th Aug 2025514 PMAQI
6th Aug 2025505 PMAQI
6th Aug 2025506 PMAQI
6th Aug 2025347 PMAQI
6th Aug 2025398 PMAQI
6th Aug 2025429 PMAQI
6th Aug 20253710 PMAQI
6th Aug 20253811 PMAQI
7th Aug 20253712 AMAQI
7th Aug 2025351 AMAQI
7th Aug 2025342 AMAQI
7th Aug 2025333 AMAQI
7th Aug 2025314 AMAQI
7th Aug 2025325 AMAQI
14°C12/17°C
7th Aug 2025306 AMAQI
7th Aug 2025297 AMAQI
7th Aug 2025288 AMAQI
7th Aug 2025289 AMAQI
7th Aug 20252710 AMAQI
7th Aug 20252411 AMAQI
7th Aug 20252512 PMAQI
7th Aug 2025271 PMAQI
7th Aug 2025222 PMAQI
7th Aug 2025233 PMAQI
7th Aug 2025244 PMAQI
7th Aug 2025255 PMAQI
7th Aug 2025266 PMAQI
7th Aug 2025297 PMAQI
7th Aug 2025278 PMAQI
7th Aug 2025239 PMAQI
7th Aug 20252510 PMAQI
7th Aug 20253011 PMAQI
8th Aug 20253512 AMAQI
8th Aug 2025361 AMAQI
8th Aug 2025382 AMAQI
8th Aug 2025393 AMAQI
8th Aug 2025444 AMAQI
8th Aug 2025435 AMAQI
14°C12/17°C
8th Aug 2025466 AMAQI
8th Aug 2025427 AMAQI
8th Aug 2025368 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20253410 AMAQI
8th Aug 20253611 AMAQI
8th Aug 20253912 PMAQI
8th Aug 2025421 PMAQI
8th Aug 2025382 PMAQI
8th Aug 2025403 PMAQI
8th Aug 2025414 PMAQI
8th Aug 2025405 PMAQI
8th Aug 2025406 PMAQI
8th Aug 2025397 PMAQI
8th Aug 2025408 PMAQI
8th Aug 2025409 PMAQI
8th Aug 20254110 PMAQI
8th Aug 20254111 PMAQI
9th Aug 20254212 AMAQI
9th Aug 2025461 AMAQI
9th Aug 2025412 AMAQI
9th Aug 2025383 AMAQI
9th Aug 2025414 AMAQI
9th Aug 2025445 AMAQI
14°C12/16°C
9th Aug 2025446 AMAQI
9th Aug 2025457 AMAQI
9th Aug 2025288 AMAQI
9th Aug 2025249 AMAQI
9th Aug 20252210 AMAQI
9th Aug 20252311 AMAQI
9th Aug 20252412 PMAQI
9th Aug 2025261 PMAQI
9th Aug 2025252 PMAQI
9th Aug 2025303 PMAQI
9th Aug 2025284 PMAQI
9th Aug 2025285 PMAQI
9th Aug 2025306 PMAQI
9th Aug 2025327 PMAQI
9th Aug 2025318 PMAQI
9th Aug 2025309 PMAQI
9th Aug 20253010 PMAQI
9th Aug 20253111 PMAQI
10th Aug 20253112 AMAQI
10th Aug 2025301 AMAQI
10th Aug 2025262 AMAQI
10th Aug 2025273 AMAQI
10th Aug 2025264 AMAQI
10th Aug 2025245 AMAQI
14°C12/16°C
10th Aug 2025246 AMAQI
10th Aug 2025307 AMAQI
10th Aug 2025208 AMAQI
10th Aug 2025209 AMAQI
10th Aug 20252110 AMAQI
10th Aug 20252211 AMAQI
10th Aug 20252212 PMAQI
10th Aug 2025231 PMAQI
10th Aug 2025232 PMAQI
10th Aug 2025223 PMAQI
10th Aug 2025234 PMAQI
10th Aug 2025235 PMAQI
10th Aug 2025246 PMAQI
10th Aug 2025237 PMAQI
10th Aug 2025228 PMAQI
10th Aug 2025259 PMAQI
10th Aug 20252410 PMAQI
10th Aug 20252111 PMAQI
11th Aug 20252212 AMAQI
11th Aug 2025211 AMAQI
11th Aug 2025212 AMAQI
11th Aug 2025233 AMAQI
11th Aug 2025244 AMAQI
11th Aug 2025225 AMAQI
14°C13/16°C
11th Aug 2025206 AMAQI
11th Aug 2025237 AMAQI
11th Aug 2025228 AMAQI
11th Aug 2025209 AMAQI
11th Aug 20252610 AMAQI
11th Aug 20253011 AMAQI
11th Aug 20253312 PMAQI
11th Aug 2025341 PMAQI
11th Aug 2025292 PMAQI
11th Aug 2025313 PMAQI
11th Aug 2025304 PMAQI
11th Aug 2025295 PMAQI
11th Aug 2025326 PMAQI
11th Aug 2025247 PMAQI
11th Aug 2025298 PMAQI
11th Aug 2025319 PMAQI
11th Aug 20253010 PMAQI
11th Aug 20252611 PMAQI
12th Aug 20252612 AMAQI
12th Aug 2025241 AMAQI
12th Aug 2025232 AMAQI
12th Aug 2025223 AMAQI
12th Aug 2025234 AMAQI
12th Aug 2025215 AMAQI
13°C12/14°C
12th Aug 2025246 AMAQI
12th Aug 2025267 AMAQI
12th Aug 2025248 AMAQI
12th Aug 2025249 AMAQI
12th Aug 20252410 AMAQI
12th Aug 20252411 AMAQI
12th Aug 20252812 PMAQI
12th Aug 2025311 PMAQI
12th Aug 2025332 PMAQI
12th Aug 2025353 PMAQI
12th Aug 2025364 PMAQI
12th Aug 2025325 PMAQI
12th Aug 2025326 PMAQI
12th Aug 2025287 PMAQI
12th Aug 2025318 PMAQI
12th Aug 2025339 PMAQI
12th Aug 20253110 PMAQI
12th Aug 20252411 PMAQI
13th Aug 20252212 AMAQI
13th Aug 2025221 AMAQI
13th Aug 2025212 AMAQI
13th Aug 2025213 AMAQI
13th Aug 2025214 AMAQI
13th Aug 2025205 AMAQI
15°C13/16°C
13th Aug 2025196 AMAQI
13th Aug 2025197 AMAQI
13th Aug 2025188 AMAQI
13th Aug 2025189 AMAQI
13th Aug 20251910 AMAQI
13th Aug 20251911 AMAQI
13th Aug 20251912 PMAQI
13th Aug 2025181 PMAQI
13th Aug 2025182 PMAQI
13th Aug 2025203 PMAQI
13th Aug 2025214 PMAQI
13th Aug 2025235 PMAQI
13th Aug 2025266 PMAQI
13th Aug 2025227 PMAQI
13th Aug 2025248 PMAQI
13th Aug 2025239 PMAQI
13th Aug 20252410 PMAQI
13th Aug 20252111 PMAQI
14th Aug 20251912 AMAQI
14th Aug 2025161 AMAQI
14th Aug 2025162 AMAQI
14th Aug 2025163 AMAQI
14th Aug 2025154 AMAQI
14th Aug 2025155 AMAQI
15°C13/16°C
14th Aug 2025136 AMAQI
14th Aug 2025127 AMAQI
14th Aug 2025138 AMAQI
14th Aug 2025139 AMAQI
14th Aug 20251510 AMAQI
14th Aug 20251311 AMAQI
14th Aug 20251412 PMAQI
14th Aug 2025161 PMAQI
14th Aug 2025182 PMAQI
14th Aug 2025213 PMAQI
14th Aug 2025224 PMAQI
14th Aug 2025265 PMAQI
14th Aug 2025266 PMAQI
14th Aug 2025177 PMAQI
14th Aug 2025218 PMAQI
14th Aug 2025299 PMAQI
14th Aug 20253210 PMAQI
14th Aug 20253611 PMAQI
15th Aug 20253712 AMAQI
15th Aug 2025371 AMAQI
15th Aug 2025362 AMAQI
15th Aug 2025383 AMAQI
15th Aug 2025364 AMAQI
15th Aug 2025375 AMAQI
15°C13/17°C
15th Aug 2025386 AMAQI
15th Aug 2025417 AMAQI
15th Aug 2025428 AMAQI
15th Aug 2025449 AMAQI
15th Aug 20254210 AMAQI
15th Aug 20254311 AMAQI
15th Aug 20254412 PMAQI
15th Aug 2025481 PMAQI
15th Aug 2025522 PMAQI
15th Aug 2025483 PMAQI
15th Aug 2025424 PMAQI
15th Aug 2025355 PMAQI
15th Aug 2025296 PMAQI
15th Aug 2025427 PMAQI
15th Aug 2025438 PMAQI
15th Aug 2025449 PMAQI
15th Aug 20254710 PMAQI
15th Aug 20253911 PMAQI
16th Aug 20252812 AMAQI
16th Aug 2025241 AMAQI
16th Aug 2025172 AMAQI
16th Aug 2025153 AMAQI
16th Aug 2025234 AMAQI
16th Aug 2025335 AMAQI
16°C13/18°C
16th Aug 2025256 AMAQI
16th Aug 2025147 AMAQI
16th Aug 2025118 AMAQI
16th Aug 2025109 AMAQI
16th Aug 20251210 AMAQI
16th Aug 20251011 AMAQI
16th Aug 20251012 PMAQI
16th Aug 2025111 PMAQI
16th Aug 2025112 PMAQI
16th Aug 2025123 PMAQI
16th Aug 2025154 PMAQI
16th Aug 2025195 PMAQI
16th Aug 2025216 PMAQI
16th Aug 2025157 PMAQI
16th Aug 2025218 PMAQI
16th Aug 2025249 PMAQI
16th Aug 20252010 PMAQI
16th Aug 20251511 PMAQI
17th Aug 20251412 AMAQI
17th Aug 2025141 AMAQI
17th Aug 2025142 AMAQI
17th Aug 2025143 AMAQI
17th Aug 2025144 AMAQI
17th Aug 2025135 AMAQI
16°C14/17°C
17th Aug 2025146 AMAQI
17th Aug 2025147 AMAQI
17th Aug 2025168 AMAQI
17th Aug 2025169 AMAQI
17th Aug 20251510 AMAQI
17th Aug 20251411 AMAQI
17th Aug 20251312 PMAQI
17th Aug 2025131 PMAQI
17th Aug 2025122 PMAQI
17th Aug 2025173 PMAQI
17th Aug 2025184 PMAQI
17th Aug 2025165 PMAQI
17th Aug 2025156 PMAQI
17th Aug 2025157 PMAQI
17th Aug 2025178 PMAQI
17th Aug 2025189 PMAQI
17th Aug 20251910 PMAQI
17th Aug 20251811 PMAQI
18th Aug 20251812 AMAQI
18th Aug 2025181 AMAQI
18th Aug 2025162 AMAQI
18th Aug 2025153 AMAQI
18th Aug 2025164 AMAQI
18th Aug 2025165 AMAQI
15°C14/16°C
18th Aug 2025146 AMAQI
18th Aug 2025157 AMAQI
18th Aug 2025168 AMAQI
18th Aug 2025199 AMAQI
18th Aug 20251810 AMAQI
18th Aug 20251811 AMAQI
18th Aug 20251612 PMAQI
18th Aug 2025181 PMAQI
18th Aug 2025192 PMAQI
18th Aug 2025223 PMAQI
18th Aug 2025264 PMAQI
18th Aug 2025245 PMAQI
18th Aug 2025206 PMAQI
18th Aug 2025187 PMAQI
18th Aug 2025188 PMAQI
18th Aug 2025179 PMAQI
18th Aug 20251710 PMAQI
18th Aug 20252011 PMAQI
19th Aug 20252312 AMAQI
19th Aug 2025221 AMAQI
19th Aug 2025232 AMAQI
19th Aug 2025243 AMAQI
19th Aug 2025254 AMAQI
19th Aug 2025265 AMAQI
14°C12/17°C
19th Aug 2025296 AMAQI
19th Aug 2025287 AMAQI
19th Aug 2025258 AMAQI
19th Aug 2025229 AMAQI
19th Aug 20252410 AMAQI
19th Aug 20252711 AMAQI
19th Aug 20253112 PMAQI
19th Aug 2025281 PMAQI
19th Aug 2025252 PMAQI
19th Aug 2025253 PMAQI
19th Aug 2025244 PMAQI
19th Aug 2025245 PMAQI
19th Aug 2025256 PMAQI
19th Aug 2025227 PMAQI
19th Aug 2025238 PMAQI
19th Aug 2025249 PMAQI
19th Aug 20252610 PMAQI
19th Aug 20252611 PMAQI
20th Aug 20252712 AMAQI
20th Aug 2025251 AMAQI
20th Aug 2025222 AMAQI
20th Aug 2025213 AMAQI
20th Aug 2025204 AMAQI
20th Aug 2025195 AMAQI
14°C12/16°C
20th Aug 2025206 AMAQI
20th Aug 2025237 AMAQI
20th Aug 2025278 AMAQI
20th Aug 2025309 AMAQI
20th Aug 20253210 AMAQI
20th Aug 20253211 AMAQI
20th Aug 20253412 PMAQI
20th Aug 2025381 PMAQI
20th Aug 2025432 PMAQI
20th Aug 2025443 PMAQI
20th Aug 2025414 PMAQI
20th Aug 2025445 PMAQI
20th Aug 2025386 PMAQI
20th Aug 2025287 PMAQI
20th Aug 2025318 PMAQI
20th Aug 2025349 PMAQI
20th Aug 20253710 PMAQI
20th Aug 20254011 PMAQI
21st Aug 20254412 AMAQI
21st Aug 2025441 AMAQI
21st Aug 2025462 AMAQI
21st Aug 2025463 AMAQI
21st Aug 2025454 AMAQI
21st Aug 2025435 AMAQI
15°C13/18°C
21st Aug 2025426 AMAQI
21st Aug 2025437 AMAQI
21st Aug 2025478 AMAQI
21st Aug 2025519 AMAQI
21st Aug 20255410 AMAQI
21st Aug 20255411 AMAQI
21st Aug 20255612 PMAQI
21st Aug 2025581 PMAQI
21st Aug 2025572 PMAQI
21st Aug 2025573 PMAQI
21st Aug 2025584 PMAQI
21st Aug 2025595 PMAQI
21st Aug 2025626 PMAQI
21st Aug 2025487 PMAQI
21st Aug 2025558 PMAQI
21st Aug 2025599 PMAQI
21st Aug 20255710 PMAQI
21st Aug 20255611 PMAQI
22nd Aug 20255612 AMAQI
22nd Aug 2025581 AMAQI
22nd Aug 2025562 AMAQI
22nd Aug 2025563 AMAQI
22nd Aug 2025564 AMAQI
22nd Aug 2025505 AMAQI
16°C13/19°C
22nd Aug 2025506 AMAQI
22nd Aug 2025447 AMAQI
22nd Aug 2025438 AMAQI
22nd Aug 2025429 AMAQI
22nd Aug 20254310 AMAQI
22nd Aug 20254111 AMAQI
22nd Aug 20254312 PMAQI
22nd Aug 2025411 PMAQI
22nd Aug 2025412 PMAQI
22nd Aug 2025463 PMAQI
22nd Aug 2025454 PMAQI
22nd Aug 2025445 PMAQI
22nd Aug 2025456 PMAQI
22nd Aug 2025487 PMAQI
22nd Aug 2025448 PMAQI
22nd Aug 2025399 PMAQI
22nd Aug 20253610 PMAQI
22nd Aug 20253411 PMAQI
23rd Aug 20253412 AMAQI
23rd Aug 2025321 AMAQI
23rd Aug 2025312 AMAQI
23rd Aug 2025283 AMAQI
23rd Aug 2025364 AMAQI
23rd Aug 2025435 AMAQI
15°C13/17°C
23rd Aug 2025436 AMAQI
23rd Aug 2025387 AMAQI
23rd Aug 2025218 AMAQI
23rd Aug 2025209 AMAQI
23rd Aug 20251910 AMAQI
23rd Aug 20252011 AMAQI
23rd Aug 20252412 PMAQI
23rd Aug 2025261 PMAQI
23rd Aug 2025262 PMAQI
23rd Aug 2025313 PMAQI
23rd Aug 2025334 PMAQI
23rd Aug 2025355 PMAQI
23rd Aug 2025316 PMAQI
23rd Aug 2025277 PMAQI
23rd Aug 2025298 PMAQI
23rd Aug 2025319 PMAQI
23rd Aug 20253110 PMAQI
23rd Aug 20252911 PMAQI
24th Aug 20252712 AMAQI
24th Aug 2025301 AMAQI
24th Aug 2025302 AMAQI
24th Aug 2025283 AMAQI
24th Aug 2025244 AMAQI
24th Aug 2025215 AMAQI
14°C12/16°C
24th Aug 2025216 AMAQI
6 AM24th Aug 2025207 AMAQI
24th Aug 2025168 AMAQI
24th Aug 2025189 AMAQI
24th Aug 20251710 AMAQI
24th Aug 20251911 AMAQI
1 PM
8 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 PM
30AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
8 AM - 9 AM
24AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 PM to 6 PM (Avg. 30), while the lowest AQI was between 8 AM to 9 AM (Avg. 24).
Night time
Avg. Highest Time
9 PM - 10 PM
29AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
3 AM
26AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 10 PM (Avg. 29), while the lowest AQI was between 3 AM to 3 AM (Avg. 26).
2025 Days Vs Air Quality
San Francisco, California, United States
2025
94%
220
6%
15
Total number of days with different AQI categories in last 236 days in 2025 (129 days remaining)
Good
220 DaysModerate
15 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 236 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
31AQI
31AQI
24th August 2025
25th August 2025
26th August 2025
27th August 2025
28th August 2025
29th August 2025
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
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
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202531AQI
27
4
27
1
30
1
29
1
29
2
25
5
31
22
1
220
15
Highest AQI recorded in
January41AQI
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 (31) shows an average percentage change of -10.8% (improved AQI) compared to previous years: 2020 (42), 2021 (36), 2022 (34), 2023 (30), 2024 (37).
