Prescott Valley, AZ 86315 Frost Dates
Frost dates for Prescott Valley, AZ, ZIP 86315
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/27, about 188 frost-free days later.
Zone 8a (10 to 15°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 Valley, not a forecast for this year.
What to do before the first frost
Zone 8a around Prescott Valley has about 9 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 Valley's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Prescott Valley compares
Prescott Valley's growing season runs about 188 days, ranking 21,833 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 421 of 506.
Learn more
zone vs. frost date explains why Zone 8a and Prescott Valley's frost date answer different questions, and the frost range explains how to read the range around Prescott Valley's dates instead of trusting one.