Ten Sleep, WY 82442 Frost Dates
82442, near Ten Sleep, WY: the frost window
Around 05/22 is the usual last spring frost, about 267 days away. Fall's first freeze usually shows up around 09/18, roughly 117 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ten Sleep in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Ten Sleep's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Ten Sleep's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Ten Sleep against the rest of the dataset
About 117 days separate Ten Sleep's last and first frost, putting it 39,257 of 40,283 ZIP codes nationally. Within WY, it ranks 114 of 192.
Learn more
Two guides worth reading on 82442: the frost range, on how to read the range around Ten Sleep's dates instead of trusting one, and local microclimates, on what one yard in Ten Sleep can differ from the 82442 normal.