Bairoil, WY 82322 Frost Dates
82322, near Bairoil, WY: the frost window
The last spring frost here typically falls around 06/01, about 277 days from today. Fall's first freeze usually shows up around 09/13, roughly 104 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Bairoil, not a forecast for this year.
Stretching the season past the first frost
Bairoil's growing season runs out in roughly 2 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 Bairoil's last frost
06/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/16 and only about 1 year in 10 sees frost after that.
Bairoil against the rest of the dataset
At roughly 104 frost-free days, Bairoil places 39,620 of 40,283 ZIP codes in this dataset. Within WY, it ranks 138 of 192.
Learn more
Two guides worth reading on 82322: local microclimates, on what one yard in Bairoil can differ from the 82322 normal, and zone vs. frost date, on why Zone 5b and Bairoil's frost date answer different questions.