What is the air quality in Foster City today?

The current Air Quality Index (AQI) in Foster City is 17 (Good). PM2.5 concentration is 4.11 µg/m³.

What is the temperature in Foster City right now?

The current temperature in Foster City is 16.1°C (feels like 16.1°C). Humidity is 67.8% and wind speed is 22.1 km/h.

Is it safe to go outside in Foster City?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0 (Moderate).

Air Quality in Foster City, United States

Partly Cloudy

16.1°C · 67.8% humidity

16.1°

Feels 16.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

45 stations

Nearby Monitoring Stations

AQI Forecast Calibrated

17 5pm

14 8pm

14 11pm

14 2am

14 5am

26 8am

26 11am

26 2pm

Station readings

CAMS model adj -11

PM2.5 Trend (24h)

25h · 106 stations

67.8%

Humidity

22.1 km/h

Wind NW

1011.5 hPa

Pressure

4.4

UV Moderate

GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Foster City?

Temperature & Precipitation

PM2.54.11 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX4.4

Moderate

Station readings (45 stations within 25 km)

4.11

Median

4.02

Average

1.88

Low

13.97

High

PM2.5 µg/m³ · Model: 7.4 · Bias: +3.3

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?

Redwood City, San Mateo, California

10.3 km

Emerald Hills

11.6 km PM2.5: 4.3 µg/m³

Belle Air School

13.9 km PM2.5: 21.3 µg/m³

Parkside Intermediate School

14.5 km PM2.5: 3.0 µg/m³

San Bruno School District Office

14.6 km PM2.5: 3.1 µg/m³

Berkeley-Palo Alto

16.0 km PM2.5: 5.1 µg/m³

California and Cypress Ave

16.3 km PM2.5: 2.9 µg/m³

Cypress and Pine Playlot

16.4 km PM2.5: 3.8 µg/m³

Gardiner Park

16.4 km PM2.5: 2.5 µg/m³

Rise South City Office

16.5 km PM2.5: 4.1 µg/m³

What cities are near Foster City?

12 Belmont 12 San Mateo 11 San Carlos 14 Redwood City 12 Burlingame 12 Millbrae 25 Menlo Park 15 San Bruno 25 East Palo Alto 16 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 2026-04-09T20:29 UTC.