Lusk, WY 82225 Frost Dates
When can you plant in Lusk, WY?
The last spring frost here typically falls around 05/16, about 261 days from today. The first fall frost typically arrives around 09/24, about 130 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lusk in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Lusk before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/16 isn't a guarantee
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/04 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lusk compares
At roughly 130 frost-free days, Lusk places 38,391 of 40,283 ZIP codes in this dataset. Within WY, it ranks 65 of 192.
Learn more
zone vs. frost date covers why Zone 5a and Lusk's frost date answer different questions. the frost range covers how to read the range around Lusk's dates instead of trusting one.