Last frost date in Nogales, Arizona

March 20

Average last frost in spring. In an early year (1 in 10) it's over by February 24; in a late year (1 in 10) it comes after April 13.

November 17

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

Source: NOAA U.S. Climate Normals 1991–2020, station Nogales International AP (USW00003196), 6.6 miles from Nogales, elevation 3,932 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Nogales, Arizona
Early yearAverageLate year
Last frost in springFeb 24Mar 20Apr 13
First frost in fallOct 30Nov 17Dec 3

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: 239

Planting calendar for Nogales

Fall planting

USDA dates for places whose average first freeze is about November 20 (Nogales: November 17).

USDA lists horseradish as generally spring-planted here.

Spring planting

USDA dates for places whose average last freeze is about March 20 (Nogales: March 20).

USDA lists chinese cabbage as generally fall-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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