Plant By Frost

Arizona

Frost dates for Willow Beach, AZ

At this NOAA station the last spring frost (32°F) usually comes by January 7 and the first fall frost around December 29, giving a growing season of about 358 days.

January 7average last spring frost
December 29average first fall frost
JanAprJulOctDec

Frost odds

1 year in 10 the last spring frost is later thanFebruary 1
Half of years the last spring frost is later thanJanuary 7
9 years in 10 the last spring frost is later thanDecember 20
1 year in 10 the first fall frost is earlier thanDecember 10
Half of years the first fall frost is earlier thanDecember 29
9 years in 10 the first fall frost is earlier thanJanuary 18

A hard freeze (28°F) usually ends by January 2 and returns around January 1.

A light frost (36°F, which can still nip tender plants) usually ends by January 29 and returns around December 15.

Station USC00029376, elevation 226 m. Based on 12 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