Prescott, AZ 86302 Frost Dates
When can you plant in Prescott, AZ?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/20, about 172 frost-free days later.
Prescott sits in USDA Zone 7b (5 to 10°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 8 weeks of growing season left in Prescott before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Prescott's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Prescott compares
About 172 days separate Prescott's last and first frost, putting it 28,156 of 40,283 ZIP codes nationally. Within AZ, it ranks 438 of 506.
Learn more
local microclimates covers what one yard in Prescott can differ from the 86302 normal. zone vs. frost date covers why Zone 7b and Prescott's frost date answer different questions.