Lost Springs, WY 82224 Frost Dates
Lost Springs, WY: when does the frost end?
The last spring frost here typically falls around 05/25, about 270 days from today. Fall's first freeze usually shows up around 09/15, roughly 112 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lost Springs, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Lost Springs's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/25 isn't a guarantee
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/11 and only about 1 year in 10 sees frost after that.
Lost Springs against the rest of the dataset
About 112 days separate Lost Springs's last and first frost, putting it 39,449 of 40,283 ZIP codes nationally. Within WY, it ranks 128 of 192.
Learn more
Before leaning on 82224's figures: zone vs. frost date explains why Zone 5a and Lost Springs's frost date answer different questions, while the frost range explains how to read the range around Lost Springs's dates instead of trusting one.