San Rafael, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Rafael, a city in Marin County, California.
Today
86°F
Sunny
Sunny. High near 86, with temperatures falling to around 84 in the afternoon. South southwest wind 2 to 8 mph.
7-day forecast for San Rafael
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 2 to 8 mph SSW | 1% |
| Tonight | 56°F | Mostly Clear | 1 to 6 mph SW | 1% |
| Wednesday | 83°F | Mostly Sunny | 1 to 7 mph SSW | 1% |
| Wednesday Night | 56°F | Partly Cloudy | 0 to 7 mph SSW | 0% |
| Thursday | 83°F | Sunny | 0 to 7 mph SW | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 6 mph SSW | 0% |
| Friday | 89°F | Sunny | 0 to 7 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 0 to 6 mph SW | 0% |
| Saturday | 86°F | Sunny | 0 to 7 mph SW | 0% |
| Saturday Night | 59°F | Mostly Clear | 2 to 7 mph SW | 0% |
| Sunday | 85°F | Sunny | 2 to 8 mph SW | 0% |
| Sunday Night | 58°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Monday | 79°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 57°F | Mostly Clear | 2 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Rafael (37.981, -122.507). Updated through the day.
Growing snapshot for San Rafael
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
10a
More local growing data for San Rafael: nearby ZIP 94901 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (2.3 mi from San Rafael). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.