Air Quality in San Francisco, United States

Windy
17.6°C · 69.8% humidity
17.6°
Feels 17.6°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
93 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
14 7am
14
14
28 10am
24
21
19 1pm
18
17
23 4pm
22
22
22 7pm
21
21
21 10pm
21
21
21 1am
21
21
21 4am
21
14
Station readings
3
3
9
CAMS model adj -13
27
27
27
27
27
27
27
27
27
34
34
34
34
34
34
34
34
34
34
34
34
34
34
27
AD 728×90

Air Quality Index Trend

36h · 1 stn

San Francisco's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

69.8%
Humidity
40.5 km/h
Wind WSW
1009.5 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
28
6.57 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

36h · 1 station
PM2.56.57 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (93 stations within 25 km)
6.57
Median
7.19
Average
1.2
Low
12.2
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -0.1

What is the 7-day forecast for San Francisco?

07-21
17.6° 13.7°
07-22
17.8° 14.3°
07-23
17.5° 16.8°
0.06 mm
07-24
19.4° 13.8°
07-25
16.2° 14.6°
07-26
19.0° 13.5°
0.06 mm
07-27
18.5° 14.0°
Both models agree Avg diff: 1.9°C

Where are air quality stations near San Francisco?

47
Howard St. & 6th St. (BC)
1.1 km PM2.5: 11.3 µg/m³
38
Eddy St. & Jones St. (BC)
1.2 km PM2.5: 9.2 µg/m³
37
San Francisco-Arkansas Street, San Francisco, California
2.1 km PM2.5: 8.9 µg/m³
22
UCSF Mount Zion
2.1 km PM2.5: 5.2 µg/m³
154
Enviro Urban (outdoor-aq)
2.6 km 12.7°C 85.7% RH PM2.5: 62.0 µg/m³ PM10: 106.0 µg/m³
22
Broadway St. & Stockton St. (BC)
2.6 km PM2.5: 5.2 µg/m³
31
UCSF Mission Bay
2.9 km PM2.5: 7.5 µg/m³
24
UCSF Parnassus
3.8 km PM2.5: 5.8 µg/m³
30
ATB Jerrold Ave. San Francisco, Ca 94124
5.0 km PM2.5: 7.2 µg/m³
33
Oakdale Ave. & 3rd St. (BC)
5.2 km PM2.5: 7.9 µg/m³

What cities are near San Francisco?

29 Mission District 28 Noe Valley 30 Bayview-Hunters Point 30 Visitacion Valley 22 Parkside 28 Daly City 32 South San Francisco 37 Oakland 35 Alameda 28 San Bruno
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:16 UTC.