Salmon, ID 83466 Frost Dates
Frost dates for Salmon, ID, ZIP 83466
Typically, the last spring freeze lands around 06/01, roughly 277 days out. The first fall frost typically arrives around 09/17, about 107 frost-free days later.
The USDA Plant Hardiness Zone Map puts Salmon 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 Salmon 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
06/01 is the middle of 30 years of NOAA records, not a promise. Plant by 05/14 and you're betting against frost in roughly 9 years out of 10. 06/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Salmon compares
At roughly 107 frost-free days, Salmon places 39,561 of 40,283 ZIP codes in this dataset. Within ID, it ranks 247 of 320.
Learn more
zone vs. frost date explains why Zone 6a and Salmon's frost date answer different questions, and the frost range explains how to read the range around Salmon's dates instead of trusting one.