Glendale, AZ 85033 Frost Dates
Frost dates for Glendale, AZ, ZIP 85033
The last spring frost here typically falls around 01/20, about 145 days from today. The first fall frost typically arrives around 12/15, about 331 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 Glendale, not a forecast for this year.
What to do before the first frost
Zone 9b around Glendale has about 16 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 Glendale's last frost
01/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/18 and you're betting against frost in roughly 9 years out of 10. 12/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Glendale compares
About 331 days separate Glendale's last and first frost, putting it 2,914 of 40,283 ZIP codes nationally. Within AZ, it ranks 161 of 506.
Learn more
local microclimates explains what one yard in Glendale can differ from the 85033 normal, and zone vs. frost date explains why Zone 9b and Glendale's frost date answer different questions.