Avondale, AZ 85343 Frost Dates
Frost dates for Avondale, AZ, ZIP 85343
Typically, the last spring freeze lands around 01/14, roughly 139 days out. The first fall frost typically arrives around 12/22, about 343 frost-free days later.
The USDA Plant Hardiness Zone Map puts Avondale in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 9b around Avondale has about 17 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
01/14 is the middle of 30 years of NOAA records, not a promise. Plant by 02/12 and you're betting against frost in roughly 9 years out of 10. 12/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Avondale compares
Avondale's growing season runs about 343 days, ranking 2,513 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 127 of 506.
Learn more
local microclimates explains what one yard in Avondale can differ from the 85343 normal, and zone vs. frost date explains why Zone 9b and Avondale's frost date answer different questions.