San Anselmo, CA Weather & Growing Conditions
Today
94°F
Sunny
Sunny. High near 94, with temperatures falling to around 89 in the afternoon. South southwest wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 2 to 7 mph SSW | 1% |
| Tonight | 54°F | Mostly Clear then Patchy Fog | 2 to 7 mph WSW | 1% |
| Wednesday | 85°F | Patchy Fog then Sunny | 2 to 7 mph SW | 2% |
| Wednesday Night | 54°F | Mostly Clear then Patchy Fog | 1 to 7 mph WSW | 0% |
| Thursday | 83°F | Sunny | 1 to 7 mph WSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Friday | 89°F | Sunny | 0 to 7 mph SW | 0% |
| Friday Night | 56°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Saturday | 87°F | Sunny | 1 to 7 mph SW | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Sunday | 85°F | Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 55°F | Mostly Clear | 5 to 9 mph WSW | 0% |
| Monday | 77°F | Sunny | 5 to 8 mph SW | 0% |
| Monday Night | 54°F | Mostly Clear | 3 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Anselmo, CA
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
Explore more for San Anselmo, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (2.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.