Frost Dates for San Anselmo, CA

Based on data from Kentfield weather station, 2 miles away

Elevation: 46 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. January 16
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 18

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost February 5
First Fall Frost December 8

Hard Freeze (28°F)

Last Spring Hard Freeze December 30
First Fall Hard Freeze December 24
37.97°N, 122.56°W © OpenStreetMap

Growing Season

337 Days January 16 to December 18

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 9b

Avg. annual minimum: 25 to 30°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csb Warm-Summer Mediterranean

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January57°49°42°
February61°52°43°
March65°55°44°
April69°58°46°
May74°62°50°
June80°66°52°
July83°68°53°
August83°68°54°
September82°67°53°
October76°63°50°
November64°55°45°
December56°49°42°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January13.9
February12.4
March10.6
April6.7
May4.5
June0.0
July0.0
August0.0
September0.0
October4.4
November9.7
December14.0

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 38m · Shortest: 9h 22m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:30 AM5:09 PM9h 39m
February7:07 AM5:42 PM10h 35m
March7:29 AM7:11 PM11h 42m
April6:41 AM7:40 PM12h 59m
May6:05 AM8:08 PM14h 03m
June5:52 AM8:29 PM14h 37m
July6:04 AM8:27 PM14h 23m
August6:30 AM7:58 PM13h 28m
September6:58 AM7:12 PM12h 14m
October7:26 AM6:25 PM10h 59m
November6:58 AM4:52 PM9h 54m
December7:25 AM4:47 PM9h 23m

Nearby Stations

San Rafael Civic Ctr, CA January 11 - December 21 Richmond, CAJanuary 4 - January 2 San Francisco Dwtn, CA San Francisco Oceanside, CA December 30 - December 25 Berkeley, CAJanuary 3 - January 1 Oakland Museum, CA

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