Crouch, ID 83637 Frost Dates
Frost dates for Crouch, ID, ZIP 83637
Typically, the last spring freeze lands around 06/06, roughly 282 days out. The first fall frost typically arrives around 09/04, about 87 frost-free days later.
Zone 6a (-10 to -5°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 Crouch, not a forecast for this year.
What to do before the first frost
Zone 6a around Crouch has about 1 week 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 06/06 isn't a guarantee
06/06 is the middle of 30 years of NOAA records, not a promise. Plant by 05/18 and you're betting against frost in roughly 9 years out of 10. 07/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Crouch compares
At roughly 87 frost-free days, Crouch places 39,972 of 40,283 ZIP codes in this dataset. Within ID, it ranks 269 of 320.
Learn more
the frost range explains how to read the range around Crouch's dates instead of trusting one, and local microclimates explains what one yard in Crouch can differ from the 83637 normal.