Avondale, AZ 85299 Frost Dates
Frost dates for Avondale, AZ, ZIP 85299
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.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Avondale, not a forecast for this year.
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 2,508 of 40,283 ZIP codes nationally. Within AZ, it ranks 122 of 506.
Learn more
the frost range explains how to read the range around Avondale's dates instead of trusting one, and local microclimates explains what one yard in Avondale can differ from the 85299 normal.