Plant By Frost

Arizona

Frost dates for Prescott Love Fld, AZ

At this NOAA station the last spring frost (32°F) usually comes by April 20 and the first fall frost around October 27, giving a growing season of about 188 days.

April 20average last spring frost
October 27average first fall frost
JanAprJulOctDec

Frost odds

1 year in 10 the last spring frost is later thanMay 7
Half of years the last spring frost is later thanApril 20
9 years in 10 the last spring frost is later thanApril 4
1 year in 10 the first fall frost is earlier thanOctober 13
Half of years the first fall frost is earlier thanOctober 27
9 years in 10 the first fall frost is earlier thanNovember 10

A hard freeze (28°F) usually ends by April 1 and returns around November 8.

A light frost (36°F, which can still nip tender plants) usually ends by May 4 and returns around October 16.

Station USW00023184, elevation 1537 m. Based on 24 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