What is the air quality in San Francisco today?

The current Air Quality Index (AQI) in San Francisco is 18 (Good). PM2.5 concentration is 4.27 µg/m³.

What is the temperature in San Francisco right now?

The current temperature in San Francisco is 16.7°C (feels like 16.7°C). Humidity is 66.1% and wind speed is 26.2 km/h.

Is it safe to go outside in San Francisco?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in San Francisco, United States

Partly Cloudy

16.7°C · 66.1% humidity

16.7°

Feels 16.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

93 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 4h ago

AQI 0

PM2.5 0.0 µg/m³ · 4h ago

Air Quality Index Trend

32h · 1 stn

View full history →

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.

66.1%

Humidity

26.2 km/h

Wind WSW

1019.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.27 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

32h · 1 station

PM2.54.27 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (93 stations within 25 km)

4.27

Median

4.41

Average

2.76

Low

7.2

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +1.5

What is the 7-day forecast for San Francisco?

10-20

20.3° 14.6°

10-21

19.8° 14.9°

0.62 mm

10-22

20.1° 14.0°

10-23

19.2° 15.1°

10-24

18.4° 14.5°

10-25

19.2° 14.5°

3.25 mm

10-26

20.1° 14.6°

Both models agree Avg diff: 2.4°C

Where are air quality stations near San Francisco?

San Francisco-Arkansas Street, San Francisco, California

2.1 km PM2.5: 4.8 µg/m³

UCSF Mount Zion

2.1 km PM2.5: 4.1 µg/m³

Enviro Urban (outdoor-aq)

2.6 km 13.6°C 75.3% RH PM2.5: 4.0 µg/m³ PM10: 6.0 µg/m³

UCSF Mission Bay

2.9 km PM2.5: 4.5 µg/m³

UCSF Parnassus

3.8 km PM2.5: 4.6 µg/m³

ATB Jerrold Ave. San Francisco, Ca 94124

5.0 km PM2.5: 4.6 µg/m³

ATB Hawkins Lane. San Francisco, Ca 94124

5.6 km PM2.5: 4.7 µg/m³

ATB Westbrook Ct. San Francisco, Ca 94124

5.9 km PM2.5: 5.3 µg/m³

UCSF Hunter’s Point

6.6 km PM2.5: 3.6 µg/m³

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Emperor Norden

7.0 km 24.0°C 44.0% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near San Francisco?

18 Mission District 18 Noe Valley 20 Bayview-Hunters Point 19 Visitacion Valley 19 Parkside 19 Daly City 22 South San Francisco 18 Oakland 19 Alameda 19 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 2026-10-20T20:06 UTC.