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San Mateo, CA

Updated 9/25/2026, 7:13:58 PM PDT
📤 Share San Mateo Conditions
WEATHER
66°F. Mostly clear. Wind 15 mph W. 7-Day Forecast →
Low 57°High 76°
Current
AIR
AQI 27 (Good).
GoodHazardous
AQI 27
PUBLIC ALERTS
No active federal alerts reported.
ROADS
US-101 • CA-92
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Sources: NWS • AirNow • NOAA Aviation Weather • Open-Meteo • Caltrans