Rush Valley, UT 84071 Frost Dates
84071, near Rush Valley, UT: the frost window
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/16, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Rush Valley in Zone 6b (-5 to 0°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
Rush Valley'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.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Rush Valley against the rest of the dataset
Rush Valley's growing season runs about 165 days, ranking 30,702 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 144 of 344.
Learn more
Two guides worth reading on 84071: local microclimates, on what one yard in Rush Valley can differ from the 84071 normal, and zone vs. frost date, on why Zone 6b and Rush Valley's frost date answer different questions.