Montpelier, ND 58472 Frost Dates
58472, near Montpelier, ND: the frost window
Typically, the last spring freeze lands around 05/08, roughly 253 days out. Fall's first freeze usually shows up around 09/29, roughly 143 days after the last spring frost.
Montpelier sits in USDA Zone 4b (-25 to -20°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
Montpelier'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
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Montpelier against the rest of the dataset
About 143 days separate Montpelier's last and first frost, putting it 36,674 of 40,283 ZIP codes nationally. Within ND, it ranks 100 of 405.
Learn more
Two guides worth reading on 58472: zone vs. frost date, on why Zone 4b and Montpelier's frost date answer different questions, and the frost range, on how to read the range around Montpelier's dates instead of trusting one.