Lignite, ND 58752 Frost Dates
58752, near Lignite, ND: the frost window
Around 05/18 is the usual last spring frost, about 263 days away. Fall's first freeze usually shows up around 09/17, roughly 119 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lignite 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
Lignite'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.
How much risk comes with planting early here
05/18 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 06/01 and only about 1 year in 10 sees frost after that.
Lignite against the rest of the dataset
About 119 days separate Lignite's last and first frost, putting it 39,189 of 40,283 ZIP codes nationally. Within ND, it ranks 399 of 405.
Learn more
Two guides worth reading on 58752: zone vs. frost date, on why Zone 4a and Lignite's frost date answer different questions, and the frost range, on how to read the range around Lignite's dates instead of trusting one.