Peoria, AZ 85383 Frost Dates
When can you plant in Peoria, AZ?
Typically, the last spring freeze lands around 01/20, roughly 145 days out. The first fall frost typically arrives around 12/15, about 331 frost-free days later.
Peoria sits in USDA Zone 9b (25 to 30°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 16 weeks of growing season left in Peoria before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/20 isn't a guarantee
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 Peoria compares
About 331 days separate Peoria's last and first frost, putting it 2,923 of 40,283 ZIP codes nationally. Within AZ, it ranks 170 of 506.
Learn more
zone vs. frost date covers why Zone 9b and Peoria's frost date answer different questions. the frost range covers how to read the range around Peoria's dates instead of trusting one.