Air Quality in Foster City, United States

Drizzle
16.3°C · 60.3% humidity
16.3°
Feels 16.3°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
46 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
17 7pm
16
13
13 10pm
13
13
13 1am
13
13
13 4am
13
13
25 7am
25
25
25 10am
25
38
13 1pm
25
25
25 4pm
25
25
Station readings
17
16
CAMS model adj -12
25
25
25
25
25
25
25
25
25
25
25
25
37
37
37
37
37
50
25
37
37
37
37
37
AD 728×90

PM2.5 Trend (24h)

25h · 105 stations
60.3%
Humidity
48.0 km/h
Wind WSW
1010.0 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Foster City?

Temperature & Precipitation

PM2.53.79 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (46 stations within 25 km)
3.79
Median
4.08
Average
2.11
Low
24.24
High
PM2.5 µg/m³ · Model: 7.4 · Bias: +3.6

What is the 7-day forecast for Foster City?

04-09
18.7° 13.2°
0.62 mm
04-10
16.3° 11.5°
1.0 mm
04-11
16.0° 10.3°
04-12
12.4° 9.2°
3.38 mm
04-13
12.8° 7.4°
0.06 mm
04-14
15.2° 7.6°
04-15
17.4° 9.5°
Both models agree Avg diff: 2.1°C

Where are air quality stations near Foster City?

18
Redwood City, San Mateo, California
10.3 km
17
Redwood City, San Mateo, California
10.3 km
17
Emerald Hills
11.6 km PM2.5: 4.0 µg/m³
83
Belle Air School
13.9 km PM2.5: 27.2 µg/m³
12
Parkside Intermediate School
14.5 km PM2.5: 3.0 µg/m³
13
San Bruno School District Office
14.6 km PM2.5: 3.1 µg/m³
17
Berkeley-Palo Alto
16.0 km PM2.5: 4.1 µg/m³
12
California and Cypress Ave
16.3 km PM2.5: 2.9 µg/m³
16
Cypress and Pine Playlot
16.4 km PM2.5: 3.8 µg/m³
11
Gardiner Park
16.4 km PM2.5: 2.6 µg/m³

What cities are near Foster City?

12 Belmont 12 San Mateo 12 San Carlos 14 Redwood City 12 Burlingame 13 Millbrae 25 Menlo Park 14 San Bruno 25 East Palo Alto 15 South San Francisco

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T22:17 UTC.