Last frost date in Larkspur, California

January 16

Average last frost in spring. In an early year (1 in 10) it's over by December 21; in a late year (1 in 10) it comes after February 25.

December 18

Average first frost in fall. 1 year in 10 it comes by November 30.

A 32°F night happens here about 9 years in 10; in those years these are the usual dates.

Source: NOAA U.S. Climate Normals 1991–2020, station Kentfield (USC00044500), 1.4 miles from Larkspur, elevation 145 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Larkspur, California
Early yearAverageLate year
Last frost in springDec 21Jan 16Feb 25
First frost in fallNov 30Dec 18Jan 19

An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.

Frost-free days in an average year: 334

Planting calendar for Larkspur

Fall planting

USDA dates for places whose average first freeze is about December 20 (Larkspur: December 18).

USDA lists horseradish as generally spring-planted here.

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.

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