Hulett, WY 82731 Frost Dates
82731, near Hulett, WY: the frost window
Around 05/23 is the usual last spring frost, about 268 days away. Fall's first freeze usually shows up around 09/18, roughly 118 days after the last spring frost.
Hulett sits in USDA Zone 4b (-25 to -20°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
Hulett's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Hulett's last frost
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Hulett against the rest of the dataset
At roughly 118 frost-free days, Hulett places 39,234 of 40,283 ZIP codes in this dataset. Within WY, it ranks 111 of 192.
Learn more
Two guides worth reading on 82731: the frost range, on how to read the range around Hulett's dates instead of trusting one, and local microclimates, on what one yard in Hulett can differ from the 82731 normal.