Council, ID 83643 Frost Dates
Frost dates for Council, ID, ZIP 83643
The last spring frost here typically falls around 05/10, about 255 days from today. The first fall frost typically arrives around 10/02, about 145 frost-free days later.
The USDA Plant Hardiness Zone Map puts Council in Zone 6a (-10 to -5°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 6a around Council has about 5 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 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 06/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Council compares
At roughly 145 frost-free days, Council places 36,236 of 40,283 ZIP codes in this dataset. Within ID, it ranks 138 of 320.
Learn more
the frost range explains how to read the range around Council's dates instead of trusting one, and local microclimates explains what one yard in Council can differ from the 83643 normal.