Last frost date in Gilbert, Arizona

February 1

Average last frost in spring. In an early year (1 in 10) it's over by January 2; in a late year (1 in 10) it comes after February 27.

December 11

Average first frost in fall. 1 year in 10 it comes by November 23.

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

Source: NOAA U.S. Climate Normals 1991–2020, station Chandler Heights (USC00021514), 8 miles from Gilbert, elevation 1,425 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Gilbert, Arizona
Early yearAverageLate year
Last frost in springJan 2Feb 1Feb 27
First frost in fallNov 23Dec 11Jan 1

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: 315

Planting calendar for Gilbert

Fall planting

USDA dates for places whose average first freeze is about December 10 (Gilbert: December 11).

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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