Belfield, ND 58627 Frost Dates
58627, near Belfield, ND: the frost window
Around 05/12 is the usual last spring frost, about 257 days away. Fall's first freeze usually shows up around 09/28, roughly 138 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Belfield 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
Belfield'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.
The actual range around Belfield's last frost
05/12 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 05/27 and only about 1 year in 10 sees frost after that.
Belfield against the rest of the dataset
Belfield's growing season runs about 138 days, ranking 37,421 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 186 of 405.
Learn more
Two guides worth reading on 58627: the frost range, on how to read the range around Belfield's dates instead of trusting one, and local microclimates, on what one yard in Belfield can differ from the 58627 normal.