Regent, ND 58650 Frost Dates
58650, near Regent, ND: the frost window
Typically, the last spring freeze lands around 05/16, roughly 261 days out. Fall's first freeze usually shows up around 09/25, roughly 129 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Regent in Zone 4a (-30 to -25°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
Regent's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/16 isn't a guarantee
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Regent against the rest of the dataset
At roughly 129 frost-free days, Regent places 38,513 of 40,283 ZIP codes in this dataset. Within ND, it ranks 316 of 405.
Learn more
Two guides worth reading on 58650: local microclimates, on what one yard in Regent can differ from the 58650 normal, and zone vs. frost date, on why Zone 4a and Regent's frost date answer different questions.