Smelterville, ID 83839 Frost Dates
When can you plant in Smelterville, ID?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 09/26, about 131 frost-free days later.
The USDA Plant Hardiness Zone Map puts Smelterville in Zone 6b (-5 to 0°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
About 4 weeks of growing season left in Smelterville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Smelterville's last frost
05/14 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. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Smelterville compares
About 131 days separate Smelterville's last and first frost, putting it 38,314 of 40,283 ZIP codes nationally. Within ID, it ranks 178 of 320.
Learn more
the frost range covers how to read the range around Smelterville's dates instead of trusting one. local microclimates covers what one yard in Smelterville can differ from the 83839 normal.