Prescott, AZ 86304 Frost Dates
Frost dates for Prescott, AZ, ZIP 86304
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/20, about 172 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Prescott, not a forecast for this year.
What to do before the first frost
Zone 7b around Prescott has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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 28,158 of 40,283 ZIP codes nationally. Within AZ, it ranks 440 of 506.
Learn more
the frost range explains how to read the range around Prescott's dates instead of trusting one, and local microclimates explains what one yard in Prescott can differ from the 86304 normal.