San Mateo, CA Weather & Growing Conditions
Today
84°F
Sunny
Sunny. High near 84, with temperatures falling to around 80 in the afternoon. West southwest wind 3 to 12 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 3 to 12 mph WSW | 0% |
| Tonight | 57°F | Mostly Clear | 3 to 10 mph SW | 1% |
| Wednesday | 83°F | Sunny | 3 to 10 mph WSW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 1 to 10 mph WSW | 0% |
| Thursday | 82°F | Sunny | 1 to 10 mph WSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 2 to 10 mph WNW | 0% |
| Friday | 85°F | Sunny | 2 to 10 mph WNW | 0% |
| Friday Night | 60°F | Mostly Clear | 2 to 10 mph W | 0% |
| Saturday | 85°F | Sunny | 2 to 12 mph W | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 to 12 mph W | 0% |
| Sunday | 80°F | Sunny | 5 to 13 mph WSW | 0% |
| Sunday Night | 58°F | Mostly Clear | 6 to 13 mph WSW | 0% |
| Monday | 77°F | Sunny | 6 to 13 mph WSW | 0% |
| Monday Night | 58°F | Mostly Clear | 6 to 13 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Mateo, CA
Last spring frost
Dec 29
First fall frost
Dec 26
Growing season
365 days
Hardiness zone
10a
Explore more for San Mateo, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Francisco Intl Ap, Ca (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.