Hulett, WY 82711 Frost Dates
Hulett, WY: when does the frost end?
Typically, the last spring freeze lands around 05/23, roughly 268 days out. Fall's first freeze usually shows up around 09/24, roughly 121 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hulett in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 4 weeks until Hulett's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/23 isn't a guarantee
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Hulett against the rest of the dataset
About 121 days separate Hulett's last and first frost, putting it 39,044 of 40,283 ZIP codes nationally. Within WY, it ranks 96 of 192.
Learn more
Before leaning on 82711's figures: zone vs. frost date explains why Zone 5a and Hulett's frost date answer different questions, while the frost range explains how to read the range around Hulett's dates instead of trusting one.