San Rafael, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Rafael, a city in Marin County, California.
This Afternoon
63°F
Light Rain
Rain. Mostly cloudy. High near 63, with temperatures falling to around 59 in the afternoon. South wind 2 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for San Rafael
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Light Rain | 2 to 7 mph S | 92% |
| Tonight | 49°F | Chance Light Rain then Mostly Cloudy | 5 mph E | 53% |
| Wednesday | 68°F | Patchy Fog then Sunny | 2 to 6 mph N | 2% |
| Wednesday Night | 49°F | Partly Cloudy | 1 to 6 mph NW | 0% |
| Thursday | 72°F | Sunny | 2 mph NW | 0% |
| Thursday Night | 49°F | Mostly Clear | 1 mph NW | 0% |
| Friday | 73°F | Sunny | 1 mph N | 0% |
| Friday Night | 50°F | Mostly Clear | 0 mph | 0% |
| Saturday | 75°F | Sunny | 0 to 5 mph NNE | 0% |
| Saturday Night | 51°F | Mostly Clear | 0 mph | 0% |
| Sunday | 74°F | Mostly Sunny | 2 mph N | 0% |
| Sunday Night | 52°F | Partly Cloudy | 0 mph | 0% |
| Monday | 72°F | Partly Sunny | 2 mph WNW | 1% |
| Monday Night | 51°F | Partly Cloudy | 1 mph NW | 2% |
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 Nov 4, 2026.