Gillette, WY 82716 Frost Dates
When can you plant in Gillette, WY?
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/25, about 125 frost-free days later.
Gillette 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.
What to do before the first frost
About 4 weeks of growing season left in Gillette before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Gillette's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gillette compares
At roughly 125 frost-free days, Gillette places 38,746 of 40,283 ZIP codes in this dataset. Within WY, it ranks 77 of 192.
Learn more
the frost range covers how to read the range around Gillette's dates instead of trusting one. local microclimates covers what one yard in Gillette can differ from the 82716 normal.