Last frost date in Folsom, California

January 12

Average last frost in spring. In an early year (1 in 10) it's over by December 18; in a late year (1 in 10) it comes after February 8.

December 16

Average first frost in fall. 1 year in 10 it comes by November 28.

A 32°F night happens here about 8 years in 10; in those years these are the usual dates.

Source: NOAA U.S. Climate Normals 1991–2020, station Sacramento 5 Ese (USW00023271), 16.7 miles from Folsom, elevation 38 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Folsom, California
Early yearAverageLate year
Last frost in springDec 18Jan 12Feb 8
First frost in fallNov 28Dec 16Jan 14

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: 341

Planting calendar for Folsom

Fall planting

USDA dates for places whose average first freeze is about December 20 (Folsom: December 16).

USDA lists horseradish as generally spring-planted here.

Spring planting

Folsom's average last frost falls outside the dates USDA's planting table covers, so we don't give spring planting dates 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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