Tempe, AZ 85210 Frost Dates
When can you plant in Tempe, AZ?
Around 02/13 is the usual last spring frost, about 169 days away. The first fall frost typically arrives around 12/05, about 298 frost-free days later.
The USDA Plant Hardiness Zone Map puts Tempe in Zone 10a (30 to 35°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 14 weeks of growing season left in Tempe before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Tempe's last frost
02/13 is the middle of 30 years of NOAA records, not a promise. Plant by 01/12 and you're betting against frost in roughly 9 years out of 10. 03/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tempe compares
At roughly 298 frost-free days, Tempe places 4,192 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 263 of 506.
Learn more
zone vs. frost date covers why Zone 10a and Tempe's frost date answer different questions. the frost range covers how to read the range around Tempe's dates instead of trusting one.