Air Quality in San Francisco, United States

Cloudy
22.2°C · 70.8% humidity
22.2°
Feels 22.2°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
92 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
11 6am
11
11
25 9am
21
18
16 12pm
15
14
13 3pm
5
5
12 6pm
11
11
11 9pm
11
11
11 12am
11
11
11 3am
11
4
Station readings
10
15
12
CAMS model adj -23
34
34
34
34
34
34
34
34
34
34
27
27
34
34
34
34
34
34
34
34
34
34
34
27
AD 728×90

Air Quality Index Trend

42h · 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.

70.8%
Humidity
4.1 km/h
Wind NNE
1016.4 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.07 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

42h · 1 station
PM2.56.07 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (92 stations within 25 km)
6.07
Median
5.98
Average
0.7
Low
8.96
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +1.3

What is the 7-day forecast for San Francisco?

09-05
22.2° 14.4°
09-06
20.8° 15.9°
0.06 mm
09-07
19.9° 14.3°
09-08
20.9° 15.2°
09-09
19.5° 15.6°
0.06 mm
09-10
18.0° 15.3°
09-11
17.5° 15.5°
0.13 mm
Both models agree Avg diff: 1.6°C

Where are air quality stations near San Francisco?

28
San Francisco-Arkansas Street, San Francisco, California
2.1 km PM2.5: 6.7 µg/m³
23
UCSF Mount Zion
2.1 km PM2.5: 5.4 µg/m³
25
UCSF Mission Bay
2.9 km PM2.5: 6.1 µg/m³
21
UCSF Parnassus
3.8 km PM2.5: 5.1 µg/m³
29
ATB Jerrold Ave. San Francisco, Ca 94124
5.0 km PM2.5: 6.9 µg/m³
30
ATB Hawkins Lane. San Francisco, Ca 94124
5.6 km PM2.5: 7.2 µg/m³
28
ATB Westbrook Ct. San Francisco, Ca 94124
5.9 km PM2.5: 6.7 µg/m³
34
UCSF Hunter’s Point
6.6 km PM2.5: 8.1 µg/m³
12
Emperor Norden
7.0 km 19.0°C 69.0% RH PM2.5: 3.0 µg/m³ PM10: 3.4 µg/m³
31
Prescott ES
11.4 km PM2.5: 7.4 µg/m³

What cities are near San Francisco?

26 Mission District 25 Noe Valley 30 Bayview-Hunters Point 28 Visitacion Valley 22 Parkside 25 Daly City 28 South San Francisco 25 Oakland 26 Alameda 25 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 2026-09-05T16:42 UTC.