Tetonia, ID 83424 Frost Dates
Frost dates for Tetonia, ID, ZIP 83424
The last spring frost here typically falls around 06/15, about 291 days from today. The first fall frost typically arrives around 09/07, about 85 frost-free days later.
Tetonia sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5a around Tetonia 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.
The actual range around Tetonia's last frost
06/15 is the middle of 30 years of NOAA records, not a promise. Plant by 05/24 and you're betting against frost in roughly 9 years out of 10. 06/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tetonia compares
At roughly 85 frost-free days, Tetonia places 39,994 of 40,283 ZIP codes in this dataset. Within ID, it ranks 281 of 320.
Learn more
local microclimates explains what one yard in Tetonia can differ from the 83424 normal, and zone vs. frost date explains why Zone 5a and Tetonia's frost date answer different questions.