Lynndyl, UT 84640 Frost Dates
84640, near Lynndyl, UT: the frost window
The last spring frost here typically falls around 05/15, about 260 days from today. Fall's first freeze usually shows up around 10/01, roughly 137 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lynndyl, not a forecast for this year.
Stretching the season past the first frost
Lynndyl'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.
How much risk comes with planting early here
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Lynndyl against the rest of the dataset
At roughly 137 frost-free days, Lynndyl places 37,596 of 40,283 ZIP codes in this dataset. Within UT, it ranks 232 of 344.
Learn more
Two guides worth reading on 84640: local microclimates, on what one yard in Lynndyl can differ from the 84640 normal, and zone vs. frost date, on why Zone 6a and Lynndyl's frost date answer different questions.