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
65°F
Light Rain Likely
Rain likely. Mostly cloudy. High near 65, with temperatures falling to around 60 in the afternoon. South southwest wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for San Bruno
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Light Rain Likely | 10 mph SSW | 65% |
| Tonight | 51°F | Chance Light Rain then Mostly Cloudy | 9 mph E | 38% |
| Wednesday | 66°F | Sunny | 6 to 17 mph NNE | 4% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 to 17 mph NW | 0% |
| Thursday | 68°F | Sunny | 2 to 12 mph NNW | 0% |
| Thursday Night | 53°F | Mostly Clear | 3 to 12 mph NW | 0% |
| Friday | 71°F | Sunny | 2 to 8 mph N | 0% |
| Friday Night | 55°F | Mostly Clear | 2 to 8 mph N | 0% |
| Saturday | 71°F | Sunny | 2 to 7 mph NNE | 0% |
| Saturday Night | 57°F | Mostly Clear | 5 to 8 mph NW | 0% |
| Sunday | 69°F | Mostly Sunny | 5 to 9 mph NNW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 3 to 9 mph NW | 0% |
| Monday | 67°F | Partly Sunny | 3 to 12 mph NW | 2% |
| Monday Night | 56°F | Mostly Cloudy | 3 to 12 mph NW | 2% |
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 Nov 4, 2026.