Phoenix, AZ 85014 Frost Dates
When can you plant in Phoenix, AZ?
Typically, the last spring freeze lands around 01/05, roughly 130 days out. The first fall frost typically arrives around 01/03, about 365 frost-free days later.
Phoenix sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 18 weeks of growing season left in Phoenix before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Phoenix's last frost
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 Phoenix compares
About 365 days separate Phoenix's last and first frost, putting it 11 of 40,283 ZIP codes nationally. Within AZ, it ranks 6 of 506.
Learn more
zone vs. frost date covers why Zone 10a and Phoenix's frost date answer different questions. the frost range covers how to read the range around Phoenix's dates instead of trusting one.