Green River, UT 84525 Frost Dates
84525, near Green River, UT: the frost window
Typically, the last spring freeze lands around 04/26, roughly 241 days out. Fall's first freeze usually shows up around 10/18, roughly 173 days after the last spring frost.
Green River sits in USDA Zone 6b (-5 to 0°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
Green River's growing season runs out in roughly 7 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
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Green River against the rest of the dataset
At roughly 173 frost-free days, Green River places 28,006 of 40,283 ZIP codes in this dataset. Within UT, it ranks 129 of 344.
Learn more
Two guides worth reading on 84525: local microclimates, on what one yard in Green River can differ from the 84525 normal, and zone vs. frost date, on why Zone 6b and Green River's frost date answer different questions.