Avondale, AZ 85079 Frost Dates
Frost dates for Avondale, AZ, ZIP 85079
Around 01/14 is the usual last spring frost, about 139 days away. 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.
The actual range around Avondale's last frost
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
About 343 days separate Avondale's last and first frost, putting it 2,493 of 40,283 ZIP codes nationally. Within AZ, it ranks 107 of 506.
Learn more
zone vs. frost date explains why Zone 9b and Avondale's frost date answer different questions, and the frost range explains how to read the range around Avondale's dates instead of trusting one.