Air Quality in South San Francisco, United States

Cloudy
22.2°C · 70.8% humidity
22.2°
Feels 22.2°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
75 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
10 9am
10
10
28 12pm
23
19
17 3pm
8
6
12 6pm
12
11
11 9pm
11
10
10 12am
10
10
10 3am
10
3
10 6am
3
3
Station readings
9
9
CAMS model adj -24
34
34
34
34
34
34
34
27
27
34
34
34
34
34
34
34
34
34
34
34
27
34
27
27
AD 728×90

Air Quality Index Trend

41h · 1 stn

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.

70.8%
Humidity
4.1 km/h
Wind NNE
1016.4 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
28
6.68 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for South San Francisco?

Temperature & Precipitation

PM2.5 Trend

41h · 1 station
PM2.56.68 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX12.9
Extreme
AD 300×250
Station readings (75 stations within 25 km)
6.68
Median
6.0
Average
2.18
Low
13.31
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +0.4

What is the 7-day forecast for South 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: 2.1°C

Where are air quality stations near South San Francisco?

23
California and Cypress Ave
0.4 km PM2.5: 5.5 µg/m³
32
Rise South City Office
0.4 km PM2.5: 7.6 µg/m³
35
Cypress and Pine Playlot
0.5 km PM2.5: 8.3 µg/m³
28
California and Hawthorn Pl
0.5 km PM2.5: 6.8 µg/m³
22
Grand and Magnolia St
1.0 km PM2.5: 5.3 µg/m³
22
Gardiner Park
1.2 km PM2.5: 5.2 µg/m³
24
Orange Memorial Park
1.6 km PM2.5: 5.7 µg/m³
26
Pacific Ave Residence
1.8 km PM2.5: 6.2 µg/m³
22
Brentwood Park
2.9 km PM2.5: 5.2 µg/m³
23
Buri Buri Park
2.9 km PM2.5: 5.4 µg/m³

What cities are near South San Francisco?

24 San Bruno 24 Millbrae 26 Visitacion Valley 25 Daly City 23 Pacifica 28 Bayview-Hunters Point 25 Burlingame 24 Noe Valley 24 Mission District 20 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 2026-09-05T19:01 UTC.