Wallace, ID 83867 Frost Dates
Frost dates for Wallace, ID, ZIP 83867
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/02, about 149 frost-free days later.
Wallace sits in USDA Zone 6b (-5 to 0°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 6b around Wallace 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.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Wallace compares
About 149 days separate Wallace's last and first frost, putting it 35,546 of 40,283 ZIP codes nationally. Within ID, it ranks 120 of 320.
Learn more
the frost range explains how to read the range around Wallace's dates instead of trusting one, and local microclimates explains what one yard in Wallace can differ from the 83867 normal.