San Anselmo, CA Weather & Growing Conditions
Today
83°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny. High near 83, with temperatures falling to around 77 in the afternoon. Southwest wind 0 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Sunny | 0 to 8 mph SW | 0% |
| Tonight | 53°F | Partly Cloudy then Patchy Fog | 2 to 8 mph W | 0% |
| Sunday | 74°F | Patchy Fog then Mostly Cloudy | 1 to 7 mph WSW | 1% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 1 to 7 mph WSW | 1% |
| Monday | 74°F | Patchy Fog then Mostly Sunny | 1 to 8 mph WSW | 0% |
| Monday Night | 54°F | Partly Cloudy | 1 to 8 mph SW | 1% |
| Tuesday | 77°F | Patchy Fog then Mostly Sunny | 1 to 6 mph SW | 0% |
| Tuesday Night | 53°F | Mostly Clear | 0 to 6 mph W | 0% |
| Wednesday | 88°F | Patchy Fog then Sunny | 0 to 5 mph ENE | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 88°F | Sunny | 0 to 6 mph W | 0% |
| Thursday Night | 57°F | Mostly Clear | 2 to 6 mph W | 0% |
| Friday | 81°F | Mostly Sunny | 2 to 7 mph WSW | 1% |
| Friday Night | 55°F | Partly Cloudy | 2 to 7 mph WSW | 1% |
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 Sep 19, 2026.