Air Quality in South San Francisco, United States

Windy
17.8°C · 68.3% humidity
17.8°
Feels 17.8°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
76 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
12 12pm
12
12
28 3pm
30
27
25 6pm
23
22
21 9pm
21
20
20 12am
20
19
19 3am
19
19
12 6am
12
12
12 9am
12
12
Station readings
14
15
12
11
CAMS model adj -15
27
27
27
27
34
34
34
34
34
34
34
34
34
34
34
34
34
34
27
27
27
27
27
27
AD 728×90

Air Quality Index Trend

42h · 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.

68.3%
Humidity
69.2 km/h
Wind WSW
1007.6 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
28
6.84 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for South San Francisco?

Temperature & Precipitation

PM2.5 Trend

42h · 1 station
PM2.56.84 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (76 stations within 25 km)
6.84
Median
6.47
Average
2.98
Low
9.46
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -0.3

What is the 7-day forecast for South San Francisco?

07-21
17.6° 13.7°
07-22
17.8° 14.3°
07-23
17.5° 16.8°
0.06 mm
07-24
19.4° 13.8°
07-25
16.2° 14.6°
07-26
19.0° 13.5°
0.06 mm
07-27
18.5° 14.0°
Both models agree Avg diff: 2.4°C

Where are air quality stations near South San Francisco?

24
California and Cypress Ave
0.4 km PM2.5: 5.8 µg/m³
35
Rise South City Office
0.4 km PM2.5: 8.3 µg/m³
27
Cypress and Pine Playlot
0.5 km PM2.5: 6.5 µg/m³
22
California and Hawthorn Pl
0.5 km PM2.5: 5.3 µg/m³
25
Grand and Magnolia St
1.0 km PM2.5: 5.9 µg/m³
22
Gardiner Park
1.2 km PM2.5: 5.3 µg/m³
28
Orange Memorial Park
1.6 km PM2.5: 6.6 µg/m³
28
Pacific Ave Residence
1.8 km PM2.5: 6.6 µg/m³
23
Brentwood Park
2.9 km PM2.5: 5.4 µg/m³
26
Buri Buri Park
2.9 km PM2.5: 6.2 µg/m³

What cities are near South San Francisco?

25 San Bruno 25 Millbrae 28 Visitacion Valley 26 Daly City 24 Pacifica 28 Bayview-Hunters Point 25 Burlingame 27 Noe Valley 27 Mission District 23 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 2026-07-21T22:47 UTC.