Belmont, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belmont, a city in San Mateo County, California.
Overnight
57°F
Mostly Clear
Mostly clear, with a low around 57. West southwest wind around 3 mph.
7-day forecast for Belmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Clear | 3 mph WSW | 0% |
| Tuesday | 85°F | Haze then Sunny | 2 to 12 mph W | 0% |
| Tuesday Night | 57°F | Mostly Clear | 2 to 10 mph SW | 0% |
| Wednesday | 84°F | Sunny | 2 to 10 mph WSW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 10 mph WSW | 0% |
| Thursday | 83°F | Sunny | 1 to 12 mph W | 0% |
| Thursday Night | 59°F | Mostly Clear | 1 to 12 mph WNW | 0% |
| Friday | 86°F | Sunny | 1 to 12 mph WNW | 0% |
| Friday Night | 60°F | Mostly Clear | 1 to 12 mph W | 0% |
| Saturday | 86°F | Sunny | 1 to 12 mph W | 0% |
| Saturday Night | 61°F | Mostly Clear | 2 to 12 mph WSW | 0% |
| Sunday | 81°F | Sunny | 2 to 13 mph W | 0% |
| Sunday Night | 59°F | Mostly Clear | 6 to 13 mph WSW | 0% |
| Monday | 78°F | Sunny | 6 to 14 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Belmont (37.514, -122.294). Updated through the day.
Growing snapshot for Belmont
Last spring frost
Jan 17
First fall frost
Dec 12
Growing season
333 days
Hardiness zone
10a
More local growing data for Belmont: nearby ZIP 94002 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Redwood City, Ca (4.1 mi from Belmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.