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Frost dates and growing zones in Arizona

6 town pages so far. Zones from the 2023 USDA Plant Hardiness Zone Map, frost dates from NOAA 1991-2020 normals at the nearest weather station.

Towns covered so far in Arizona fall in USDA zones 6a, 7b, 8b, 9b. Median dates mean frost comes later (spring) or earlier (fall) in half of years.

Towns

Town	Zone	Median last frost	Median first frost
Tucson	9b	Feb 5	Dec 9
Mesa	9b	Feb 1	Dec 10
Gilbert	9b	Feb 1	Dec 10
Flagstaff	6a	Jun 4	Sep 28
Prescott	7b	Apr 30	Oct 20
Kingman	8b	Apr 2	Nov 11