Clearmont, WY 82831 Frost Dates
82831, near Clearmont, WY: the frost window
The last spring frost here typically falls around 05/14, about 259 days from today. Fall's first freeze usually shows up around 09/30, roughly 137 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Clearmont in Zone 4b (-25 to -20°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
Clearmont's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/14 isn't a guarantee
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Clearmont against the rest of the dataset
About 137 days separate Clearmont's last and first frost, putting it 37,593 of 40,283 ZIP codes nationally. Within WY, it ranks 40 of 192.
Learn more
Two guides worth reading on 82831: local microclimates, on what one yard in Clearmont can differ from the 82831 normal, and zone vs. frost date, on why Zone 4b and Clearmont's frost date answer different questions.