Shoshoni, WY 82649 Frost Dates
Frost dates for Shoshoni, WY, ZIP 82649
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 10/03, about 145 frost-free days later.
Shoshoni sits in USDA Zone 4b (-25 to -20°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 4b around Shoshoni 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.
The actual range around Shoshoni's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Shoshoni compares
At roughly 145 frost-free days, Shoshoni places 36,265 of 40,283 ZIP codes in this dataset. Within WY, it ranks 12 of 192.
Learn more
the frost range explains how to read the range around Shoshoni's dates instead of trusting one, and local microclimates explains what one yard in Shoshoni can differ from the 82649 normal.