Plant By Frost

Arizona

Frost dates for Picacho 8 Se, AZ

At this NOAA station the last spring frost (32°F) usually comes by February 6 and the first fall frost around December 9, giving a growing season of about 308 days.

February 6average last spring frost
December 9average first fall frost
JanAprJulOctDec

Frost odds

1 year in 10 the last spring frost is later thanMarch 5
Half of years the last spring frost is later thanFebruary 6
9 years in 10 the last spring frost is later thanJanuary 6
1 year in 10 the first fall frost is earlier thanNovember 22
Half of years the first fall frost is earlier thanDecember 9
9 years in 10 the first fall frost is earlier thanDecember 26

A hard freeze (28°F) usually ends by January 14 and returns around December 19.

A light frost (36°F, which can still nip tender plants) usually ends by February 28 and returns around November 29.

Station USC00026513, elevation 604 m. Based on 22 years of 1991 to 2020 records. A garden higher up, in a hollow or far from this station can freeze later in spring.

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Sources

  1. U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
  2. Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
  3. 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026