McCammon, ID 83250 Frost Dates
Frost dates for McCammon, ID, ZIP 83250
Typically, the last spring freeze lands around 05/23, roughly 268 days out. The first fall frost typically arrives around 09/24, about 121 frost-free days later.
The USDA Plant Hardiness Zone Map puts McCammon in Zone 5b (-15 to -10°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
Zone 5b around McCammon has about 4 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.
How much risk comes with planting early here
05/23 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 06/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How McCammon compares
McCammon's growing season runs about 121 days, ranking 39,027 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 208 of 320.
Learn more
zone vs. frost date explains why Zone 5b and McCammon's frost date answer different questions, and the frost range explains how to read the range around McCammon's dates instead of trusting one.