What is the air quality in San Francisco today?

The current Air Quality Index (AQI) in San Francisco is 28 (Good). PM2.5 concentration is 6.73 µg/m³.

What is the temperature in San Francisco right now?

The current temperature in San Francisco is 27.1°C (feels like 31.9°C). Humidity is 74.9% and wind speed is 18.3 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, El Salvador

Drizzle

27.1°C · 74.9% humidity

27.1°

Feels 31.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

25h · 1 stn

View full history →

San Francisco's air quality is influenced by vehicle emissions, industrial activity, and seasonal agricultural burning. Pollution patterns vary with dry and wet seasons.

74.9%

Humidity

18.3 km/h

Wind SW

1009.0 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.73 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for San Francisco?

Temperature & Precipitation

PM2.5 Trend

25h · 1 station

PM2.56.73 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

6.73

Median

6.73

Average

6.73

Low

6.73

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -0.7

What is the 7-day forecast for San Francisco?

10-21

27.1° 20.4°

18.94 mm

10-22

29.4° 19.7°

16.69 mm

10-23

29.5° 20.1°

9.94 mm

10-24

29.1° 19.7°

8.69 mm

10-25

28.8° 19.8°

10.56 mm

10-26

26.6° 20.0°

22.62 mm

10-27

30.0° 18.2°

4.94 mm

Both models agree Avg diff: 3.0°C

Where are air quality stations near San Francisco?

el-salvador-san-miguel-pan-american-highway

24.4 km PM2.5: 6.7 µg/m³ PM10: 7.0 µg/m³

What cities are near San Francisco?

28 San Miguel 62 San Rafael Oriente 69 Santiago de María 20 La Unión 69 Usulután 12 Sensuntepeque 69 Puerto El Triunfo 13 San Vicente 21 San Lorenzo 15 La Paz

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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 2026-10-21T15:19 UTC.