Torrington, WY 82240 Frost Dates
Frost dates for Torrington, WY, ZIP 82240
Around 05/14 is the usual last spring frost, about 259 days away. The first fall frost typically arrives around 09/24, about 130 frost-free days later.
The USDA Plant Hardiness Zone Map puts Torrington in Zone 5a (-20 to -15°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 5a around Torrington has about 4 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
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Torrington compares
About 130 days separate Torrington's last and first frost, putting it 38,368 of 40,283 ZIP codes nationally. Within WY, it ranks 63 of 192.
Learn more
local microclimates explains what one yard in Torrington can differ from the 82240 normal, and zone vs. frost date explains why Zone 5a and Torrington's frost date answer different questions.