Air Quality in Foster City, United States

Windy
15.8°C · 53.2% humidity
15.8°
Feels 15.8°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
47 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
11 4pm
11
11
20 7pm
17
16
14 10pm
13
13
12 1am
12
12
11 4am
11
11
0 7am
0
0
0 10am
11
11
11 1pm
0
0
Station readings
10
23
16
13
CAMS model adj -43
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
34
34
34
34
54
54
54
34
34
AD 728×90

Air Quality Index Trend

43h · 1 stn

Foster City's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

53.2%
Humidity
80.7 km/h
Wind W
1017.3 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
20
4.72 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Foster City?

Temperature & Precipitation

PM2.5 Trend

43h · 1 station
PM2.54.72 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (47 stations within 25 km)
4.72
Median
4.81
Average
3.32
Low
9.06
High
PM2.5 µg/m³ · Model: 9.65 · Bias: +4.9

What is the 7-day forecast for Foster City?

06-09
16.4° 9.5°
06-10
22.5° 10.8°
06-11
25.1° 14.4°
06-12
22.5° 11.2°
06-13
19.2° 10.5°
06-14
21.9° 11.0°
06-15
20.3° 10.7°
Both models agree Avg diff: 4.1°C

Where are air quality stations near Foster City?

26
Redwood City, San Mateo, California
10.3 km PM2.5: 6.2 µg/m³
37
Redwood City, San Mateo, California
10.3 km PM2.5: 8.9 µg/m³
15
Emerald Hills
11.6 km PM2.5: 3.6 µg/m³
18
Belle Air School
13.9 km PM2.5: 4.4 µg/m³
28
Parkside Intermediate School (redeployment)
14.5 km PM2.5: 6.6 µg/m³
20
Parkside Intermediate School
14.5 km PM2.5: 4.8 µg/m³
14
Berkeley-Palo Alto
16.0 km PM2.5: 3.3 µg/m³
20
California and Cypress Ave
16.3 km PM2.5: 4.9 µg/m³
28
Cypress and Pine Playlot
16.4 km PM2.5: 6.8 µg/m³
20
Gardiner Park
16.4 km PM2.5: 4.7 µg/m³

What cities are near Foster City?

18 Belmont 20 San Mateo 17 San Carlos 15 Redwood City 21 Burlingame 21 Millbrae 15 Menlo Park 20 San Bruno 14 East Palo Alto 25 South San Francisco
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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 2026-06-09T02:19 UTC.