Menan, ID 83434 Frost Dates
Frost dates for Menan, ID, ZIP 83434
The last spring frost here typically falls around 05/09, about 254 days from today. The first fall frost typically arrives around 10/05, about 148 frost-free days later.
Zone 5a (-20 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 Menan, not a forecast for this year.
What to do before the first frost
Zone 5a around Menan 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 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Menan compares
At roughly 148 frost-free days, Menan places 35,767 of 40,283 ZIP codes in this dataset. Within ID, it ranks 125 of 320.
Learn more
local microclimates explains what one yard in Menan can differ from the 83434 normal, and zone vs. frost date explains why Zone 5a and Menan's frost date answer different questions.