Fernan Lake Village, ID 83816 Frost Dates
Frost dates for Fernan Lake Village, ID, ZIP 83816
Typically, the last spring freeze lands around 04/22, roughly 237 days out. The first fall frost typically arrives around 10/18, about 179 frost-free days later.
Zone 7a (0 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 Fernan Lake Village, not a forecast for this year.
What to do before the first frost
Zone 7a around Fernan Lake Village has about 7 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 04/22 isn't a guarantee
04/22 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. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fernan Lake Village compares
Fernan Lake Village's growing season runs about 179 days, ranking 25,510 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 46 of 320.
Learn more
the frost range explains how to read the range around Fernan Lake Village's dates instead of trusting one, and local microclimates explains what one yard in Fernan Lake Village can differ from the 83816 normal.