What is the air quality in South San Francisco today?

The current Air Quality Index (AQI) in South San Francisco is 21 (Good). PM2.5 concentration is 5.03 µg/m³.

What is the temperature in South San Francisco right now?

The current temperature in South 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 South San Francisco?

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

Air Quality in South 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.

77 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 →

South 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▲

5.03 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for South San Francisco?

Temperature & Precipitation

PM2.5 Trend

32h · 1 station

PM2.55.03 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (77 stations within 25 km)

5.03

Median

4.62

Average

2.99

Low

11.0

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +0.8

What is the 7-day forecast for South 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: 2.2°C

Where are air quality stations near South San Francisco?

California and Cypress Ave

0.4 km PM2.5: 4.3 µg/m³

Rise South City Office

0.4 km PM2.5: 5.5 µg/m³

Cypress and Pine Playlot

0.5 km PM2.5: 6.0 µg/m³

California and Hawthorn Pl

0.5 km PM2.5: 4.8 µg/m³

Grand and Magnolia St

1.0 km PM2.5: 4.2 µg/m³

Gardiner Park

1.2 km PM2.5: 4.0 µg/m³

Orange Memorial Park

1.6 km PM2.5: 4.3 µg/m³

Pacific Ave Residence

1.8 km PM2.5: 4.6 µg/m³

7th & Walnut Park

2.4 km PM2.5: 4.4 µg/m³

Forest Lane Park

2.5 km PM2.5: 4.6 µg/m³

What cities are near South San Francisco?

18 San Bruno 18 Millbrae 19 Visitacion Valley 19 Daly City 18 Pacifica 19 Bayview-Hunters Point 19 Burlingame 20 Noe Valley 21 Mission District 19 Parkside

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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 2026-10-20T20:58 UTC.