Kingman, AZ 86437 Frost Dates
Frost dates for Kingman, AZ, ZIP 86437
Typically, the last spring freeze lands around 05/17, roughly 262 days out. The first fall frost typically arrives around 10/10, about 146 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 Kingman, not a forecast for this year.
What to do before the first frost
Zone 8a around Kingman has about 6 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.
Why 05/17 isn't a guarantee
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 06/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kingman compares
Kingman's growing season runs about 146 days, ranking 36,014 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 474 of 506.
Learn more
local microclimates explains what one yard in Kingman can differ from the 86437 normal, and zone vs. frost date explains why Zone 8a and Kingman's frost date answer different questions.