Air Quality in San Francisco, United States

Windy
15.7°C · 76.4% humidity
15.7°
Feels 15.7°
4
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
8 2pm
15
15
4 5pm
7
29
31 8pm
32
33
34 11pm
34
14
14 2am
15
15
8 5am
15
15
15 8am
15
15
15 11am
15
15
Station readings
8
19
CAMS model adj -19
27
34
34
34
34
54
54
54
54
54
54
34
34
34
34
27
34
34
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

44h · 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.

76.4%
Humidity
47.4 km/h
Wind SW
1011.8 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
4
1.0 µg/m³
PM10▲
65
84.3 µg/m³
050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

44h · 1 station
PM2.51.0 µg/m³ ✓ WHO
Good
PM1084.3 µg/m³
Moderate
UV INDEX12.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
1.0
Median
1.0
Average
1.0
Low
1.0
High
PM2.5 µg/m³ · Model: 30.95 · Bias: +30.0

What is the 7-day forecast for San Francisco?

08-03
17.2° 14.4°
0.13 mm
08-04
15.9° 14.3°
0.06 mm
08-05
17.5° 13.7°
08-06
16.7° 14.6°
08-07
17.2° 14.5°
08-08
16.5° 14.4°
0.06 mm
08-09
20.1° 15.0°
Both models agree Avg diff: 1.1°C

Where are air quality stations near San Francisco?

17
San Francisco-Arkansas Street, San Francisco, California
2.1 km PM2.5: 4.1 µg/m³
20
UCSF Mount Zion
2.1 km PM2.5: 4.9 µg/m³
26
UCSF Mission Bay
2.9 km PM2.5: 6.3 µg/m³
22
UCSF Parnassus
3.8 km PM2.5: 5.3 µg/m³
26
UCSF Hunter’s Point
6.6 km PM2.5: 6.2 µg/m³
19
Emperor Norden
7.0 km 19.0°C 67.0% RH PM2.5: 4.6 µg/m³ PM10: 5.2 µg/m³
31
Prescott ES
11.4 km PM2.5: 7.4 µg/m³
23
Gardiner Park
12.4 km PM2.5: 5.4 µg/m³
35
Martin Luther King, Jr. ES
12.5 km PM2.5: 8.3 µg/m³
37
West Oakland MS
12.6 km PM2.5: 8.9 µg/m³

What cities are near San Francisco?

4 Mission District 4 Noe Valley 4 Bayview-Hunters Point 4 Visitacion Valley 4 Parkside 4 Daly City 4 South San Francisco 4 Oakland 4 Alameda 4 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 2026-08-08T00:00 UTC.