Lander, WY 82520 Frost Dates
Lander, WY: when does the frost end?
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 10/02, roughly 140 days after the last spring frost.
Lander sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Lander's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lander's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Lander against the rest of the dataset
About 140 days separate Lander's last and first frost, putting it 37,043 of 40,283 ZIP codes nationally. Within WY, it ranks 30 of 192.
Learn more
Before leaning on 82520's figures: zone vs. frost date explains why Zone 5a and Lander's frost date answer different questions, while the frost range explains how to read the range around Lander's dates instead of trusting one.