Onaway, ID 83834 Frost Dates
Frost dates for Onaway, ID, ZIP 83834
Typically, the last spring freeze lands around 05/15, roughly 260 days out. The first fall frost typically arrives around 09/21, about 126 frost-free days later.
Zone 6b (-5 to 0°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 Onaway, not a forecast for this year.
What to do before the first frost
Zone 6b around Onaway has about 3 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
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 06/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Onaway compares
At roughly 126 frost-free days, Onaway places 38,721 of 40,283 ZIP codes in this dataset. Within ID, it ranks 193 of 320.
Learn more
local microclimates explains what one yard in Onaway can differ from the 83834 normal, and zone vs. frost date explains why Zone 6b and Onaway's frost date answer different questions.