Corinne, UT 84307 Frost Dates
84307, near Corinne, UT: the frost window
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/05, roughly 150 days after the last spring frost.
Corinne 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
Corinne's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Corinne against the rest of the dataset
Corinne's growing season runs about 150 days, ranking 35,347 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 200 of 344.
Learn more
Two guides worth reading on 84307: local microclimates, on what one yard in Corinne can differ from the 84307 normal, and zone vs. frost date, on why Zone 6b and Corinne's frost date answer different questions.