Clearmont, WY 82837 Frost Dates
Clearmont, WY: when does the frost end?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. 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
With roughly 5 weeks until Clearmont's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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 37,595 of 40,283 ZIP codes nationally. Within WY, it ranks 42 of 192.
Learn more
Before leaning on 82837's figures: zone vs. frost date explains why Zone 4b and Clearmont's frost date answer different questions, while the frost range explains how to read the range around Clearmont's dates instead of trusting one.