San Mateo, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Mateo, a city in San Mateo County, California.
Tonight
52°F
Chance Light Rain then Mostly Cloudy
A chance of rain before 10pm. Mostly cloudy, with a low around 52. East wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for San Mateo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Chance Light Rain then Mostly Cloudy | 6 mph E | 40% |
| Wednesday | 67°F | Sunny | 5 to 13 mph N | 2% |
| Wednesday Night | 53°F | Mostly Cloudy | 2 to 13 mph NW | 0% |
| Thursday | 70°F | Patchy Fog then Sunny | 2 to 8 mph NNW | 0% |
| Thursday Night | 52°F | Mostly Clear then Patchy Fog | 2 to 8 mph NW | 0% |
| Friday | 72°F | Patchy Fog then Sunny | 2 to 6 mph N | 0% |
| Friday Night | 53°F | Clear | 1 to 6 mph NNW | 0% |
| Saturday | 77°F | Sunny | 1 to 5 mph NNE | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 to 6 mph NW | 0% |
| Sunday | 75°F | Mostly Sunny | 2 to 6 mph NNW | 0% |
| Sunday Night | 55°F | Partly Cloudy | 1 to 6 mph WNW | 0% |
| Monday | 73°F | Partly Sunny | 1 to 7 mph WNW | 1% |
| Monday Night | 54°F | Mostly Cloudy | 1 to 7 mph NW | 2% |
| Tuesday | 73°F | Mostly Sunny | 1 to 6 mph N | 7% |
Forecast source: National Weather Service (api.weather.gov) for San Mateo (37.560, -122.311). Updated through the day.
Growing snapshot for San Mateo
Last spring frost
Dec 29
First fall frost
Dec 26
Growing season
365 days
Hardiness zone
10a
More local growing data for San Mateo: nearby ZIP 94401 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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Baywood Park
Belmont
Brisbane
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Burlingame
Colma
Daly City
El Granada
Emerald Lake Hills
Foster City
Half Moon Bay
Highlands
Hillsborough
La Honda
Ladera
Loma Mar
Millbrae
Montara
Moss Beach
North Fair Oaks
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South San Francisco
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Woodside
Climate data from the nearest NOAA station, San Francisco Intl Ap, Ca (3.9 mi from San Mateo). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.