Nephi, UT 84648 Frost Dates
84648, near Nephi, UT: the frost window
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/10, roughly 156 days after the last spring frost.
Nephi sits in USDA Zone 6a (-10 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
Nephi's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/24 and only about 1 year in 10 sees frost after that.
Nephi against the rest of the dataset
About 156 days separate Nephi's last and first frost, putting it 33,565 of 40,283 ZIP codes nationally. Within UT, it ranks 181 of 344.
Learn more
Two guides worth reading on 84648: the frost range, on how to read the range around Nephi's dates instead of trusting one, and local microclimates, on what one yard in Nephi can differ from the 84648 normal.