Glendale, AZ 85035 Frost Dates
When can you plant in Glendale, AZ?
The last spring frost here typically falls around 01/21, about 146 days from today. The first fall frost typically arrives around 12/16, about 331 frost-free days later.
The USDA Plant Hardiness Zone Map puts Glendale 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
About 16 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
01/21 is the middle of 30 years of NOAA records, not a promise. Plant by 02/20 and you're betting against frost in roughly 9 years out of 10. 12/24 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 2,915 of 40,283 ZIP codes nationally. Within AZ, it ranks 162 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.