Glendale, AZ 85017 Frost Dates
When can you plant in Glendale, AZ?
The last spring frost here typically falls around 01/05, about 130 days from today. The first fall frost typically arrives around 01/03, about 365 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
About 18 weeks of growing season left in Glendale before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
01/05 is the middle of 30 years of NOAA records, not a promise. Plant by 01/22 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 Glendale compares
About 365 days separate Glendale's last and first frost, putting it 321 of 40,283 ZIP codes nationally. Within AZ, it ranks 8 of 506.
Learn more
zone vs. frost date covers why Zone 9b and Glendale's frost date answer different questions. the frost range covers how to read the range around Glendale's dates instead of trusting one.