San Bruno, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Bruno, a city in San Mateo County, California.
Today
76°F
Haze then Sunny
Haze between 7am and 8am. Sunny. High near 76, with temperatures falling to around 72 in the afternoon. West southwest wind 3 to 13 mph, with gusts as high as 20 mph.
7-day forecast for San Bruno
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Haze then Sunny | 3 to 13 mph WSW | 1% |
| Tonight | 57°F | Mostly Clear | 5 to 12 mph WSW | 1% |
| Wednesday | 75°F | Sunny | 5 to 12 mph WSW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Thursday | 75°F | Mostly Sunny | 2 to 12 mph WSW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 2 to 12 mph W | 0% |
| Friday | 76°F | Sunny | 2 to 12 mph W | 0% |
| Friday Night | 59°F | Partly Cloudy | 3 to 12 mph WSW | 0% |
| Saturday | 72°F | Mostly Sunny | 3 to 12 mph WSW | 0% |
| Saturday Night | 60°F | Partly Cloudy | 8 to 12 mph WSW | 0% |
| Sunday | 70°F | Sunny | 8 to 14 mph WSW | 0% |
| Sunday Night | 58°F | Partly Cloudy | 9 to 14 mph WSW | 0% |
| Monday | 67°F | Mostly Sunny | 9 to 14 mph WSW | 0% |
| Monday Night | 58°F | Partly Cloudy | 8 to 14 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Bruno (37.626, -122.431). Updated through the day.
Growing snapshot for San Bruno
Last spring frost
Jan 11
First fall frost
Jan 10
Growing season
365 days
Hardiness zone
10a
More local growing data for San Bruno: nearby ZIP 94066 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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San Mateo
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Climate data from the nearest NOAA station, Pacifica 4 Sse, Ca (3.2 mi from San Bruno). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.