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.
This Afternoon
70°F
Sunny
Sunny. High near 70, with temperatures falling to around 66 in the afternoon. West wind 14 to 17 mph, with gusts as high as 24 mph.
7-day forecast for San Bruno
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Sunny | 14 to 17 mph W | 0% |
| Tonight | 58°F | Partly Cloudy | 6 to 16 mph W | 1% |
| Saturday | 72°F | Mostly Sunny | 3 to 15 mph W | 1% |
| Saturday Night | 58°F | Mostly Cloudy | 8 to 15 mph W | 2% |
| Sunday | 66°F | Partly Sunny | 8 to 14 mph W | 3% |
| Sunday Night | 58°F | Mostly Cloudy | 5 to 14 mph W | 3% |
| Monday | 68°F | Mostly Sunny | 5 to 12 mph WSW | 1% |
| Monday Night | 58°F | Partly Cloudy | 5 to 12 mph WSW | 1% |
| Tuesday | 69°F | Mostly Sunny | 5 to 12 mph WSW | 1% |
| Tuesday Night | 58°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Wednesday | 76°F | Sunny | 2 to 10 mph WSW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 1 to 10 mph WSW | 0% |
| Thursday | 77°F | Sunny | 1 to 10 mph WSW | 0% |
| Thursday Night | 60°F | Partly Cloudy | 5 to 10 mph W | 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
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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 Sep 19, 2026.