Henefer, UT 84018 Frost Dates
84018, near Henefer, UT: the frost window
Around 05/30 is the usual last spring frost, about 275 days away. Fall's first freeze usually shows up around 09/18, roughly 112 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Henefer in Zone 6a (-10 to -5°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
Henefer's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Henefer's last frost
05/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/16 and only about 1 year in 10 sees frost after that.
Henefer against the rest of the dataset
About 112 days separate Henefer's last and first frost, putting it 39,430 of 40,283 ZIP codes nationally. Within UT, it ranks 317 of 344.
Learn more
Two guides worth reading on 84018: local microclimates, on what one yard in Henefer can differ from the 84018 normal, and zone vs. frost date, on why Zone 6a and Henefer's frost date answer different questions.