San Anselmo, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for San Anselmo, a town in Marin County, California.

Overnight

54°F

Mostly Clear

Mostly clear, with a low around 54. West wind around 2 mph.

7-day forecast for San Anselmo

When	Temp	Forecast	Wind	Precip
Overnight	54°F	Mostly Clear	2 mph W	0%
Saturday	81°F	Sunny	0 to 7 mph WSW	0%
Saturday Night	54°F	Partly Cloudy	2 to 7 mph W	0%
Sunday	72°F	Mostly Cloudy	1 to 5 mph WSW	1%
Sunday Night	54°F	Mostly Cloudy	5 mph W	1%
Monday	72°F	Mostly Sunny	2 to 6 mph WSW	1%
Monday Night	55°F	Partly Cloudy	2 to 6 mph SW	1%
Tuesday	75°F	Mostly Sunny	1 to 6 mph SW	0%
Tuesday Night	55°F	Mostly Clear	0 to 6 mph W	0%
Wednesday	88°F	Sunny	0 to 5 mph WNW	0%
Wednesday Night	59°F	Mostly Clear	0 to 5 mph NW	0%
Thursday	89°F	Sunny	0 to 5 mph W	0%
Thursday Night	58°F	Mostly Clear	1 to 5 mph W	0%
Friday	81°F	Mostly Sunny	1 to 7 mph WSW	1%

Forecast source: National Weather Service (api.weather.gov) for San Anselmo (37.982, -122.570). Updated through the day.

Growing snapshot for San Anselmo

Last spring frost

Jan 11

First fall frost

Dec 21

Growing season

349 days

Hardiness zone

More local growing data for San Anselmo: nearby ZIP 94960 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Alto Belvedere Black Point-Green Point Bolinas Corte Madera Dillon Beach Fairfax Inverness Kentfield Lagunitas-Forest Knolls Larkspur Lucas Valley-Marinwood Marin City Mill Valley Muir Beach Nicasio Novato Petaluma Center Point Reyes Station Ross San Francisco San Geronimo San Rafael Santa Venetia Sausalito Sleepy Hollow Stinson Beach Strawberry Tamalpais-Homestead Valley Tiburon

All California locations ›

Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (2.2 mi from San Anselmo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.