Green River, WY 82935 Frost Dates
82935, near Green River, WY: the frost window
The last spring frost here typically falls around 05/24, about 269 days from today. Fall's first freeze usually shows up around 09/22, roughly 120 days after the last spring frost.
Zone 5a (-20 to -15°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 Green River, not a forecast for this year.
Stretching the season past the first frost
Green River's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/10 and only about 1 year in 10 sees frost after that.
Green River against the rest of the dataset
About 120 days separate Green River's last and first frost, putting it 39,072 of 40,283 ZIP codes nationally. Within WY, it ranks 102 of 192.
Learn more
Two guides worth reading on 82935: the frost range, on how to read the range around Green River's dates instead of trusting one, and local microclimates, on what one yard in Green River can differ from the 82935 normal.