Air Quality in San Francisco, United States

Windy
15.4°C · 74.3% humidity
15.4°
Feels 15.4°
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
93 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
1 12pm
8
8
17 3pm
14
13
31 6pm
30
30
29 9pm
29
29
28 12am
28
28
28 3am
8
8
1 6am
1
1
1 9am
1
1
Station readings
3
CAMS model adj -26
27
34
34
34
34
34
54
54
54
54
54
54
54
54
54
54
34
34
27
27
27
27
27
27
AD 728×90

Air Quality Index Trend

38h · 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.

74.3%
Humidity
99.4 km/h
Wind WNW
1018.1 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
17
4.1 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

38h · 1 station
PM2.54.1 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (93 stations within 25 km)
4.1
Median
3.97
Average
0.77
Low
7.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +3.2

What is the 7-day forecast for San Francisco?

05-28
15.4° 11.7°
05-29
15.4° 12.3°
05-30
14.0° 12.3°
05-31
16.6° 13.7°
0.25 mm
06-01
16.5° 12.6°
0.06 mm
06-02
15.0° 11.8°
0.06 mm
06-03
15.5° 11.1°
0.06 mm
Both models agree Avg diff: 1.4°C

Where are air quality stations near San Francisco?

16
Howard St. & 6th St. (BC)
1.1 km PM2.5: 3.8 µg/m³
20
Eddy St. & Jones St. (BC)
1.2 km PM2.5: 4.7 µg/m³
51
San Francisco-Arkansas Street, San Francisco, California
2.1 km PM2.5: 12.1 µg/m³
15
UCSF Mount Zion
2.1 km PM2.5: 3.5 µg/m³
22
Broadway St. & Stockton St. (BC)
2.6 km PM2.5: 5.3 µg/m³
15
UCSF Mission Bay
2.9 km PM2.5: 3.5 µg/m³
15
UCSF Parnassus
3.8 km PM2.5: 3.6 µg/m³
15
ATB Jerrold Ave. San Francisco, Ca 94124
5.0 km PM2.5: 3.7 µg/m³
17
Oakdale Ave. & 3rd St. (BC)
5.2 km PM2.5: 4.0 µg/m³
16
ATB Hawkins Lane. San Francisco, Ca 94124
5.6 km PM2.5: 3.8 µg/m³

What cities are near San Francisco?

16 Mission District 16 Noe Valley 15 Bayview-Hunters Point 16 Visitacion Valley 13 Parkside 15 Daly City 17 South San Francisco 17 Oakland 17 Alameda 15 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 2026-05-28T22:55 UTC.