Mapleton, UT 84664 Frost Dates
84664, near Mapleton, UT: the frost window
The last spring frost here typically falls around 04/25, about 240 days from today. Fall's first freeze usually shows up around 10/18, roughly 174 days after the last spring frost.
Mapleton sits in USDA Zone 7a (0 to 5°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
Mapleton'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 04/25 isn't a guarantee
04/25 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 05/13 and only about 1 year in 10 sees frost after that.
Mapleton against the rest of the dataset
About 174 days separate Mapleton's last and first frost, putting it 27,395 of 40,283 ZIP codes nationally. Within UT, it ranks 125 of 344.
Learn more
Two guides worth reading on 84664: local microclimates, on what one yard in Mapleton can differ from the 84664 normal, and zone vs. frost date, on why Zone 7a and Mapleton's frost date answer different questions.