Lankin, ND 58250 Frost Dates
58250, near Lankin, ND: the frost window
Around 05/11 is the usual last spring frost, about 256 days away. Fall's first freeze usually shows up around 09/28, roughly 138 days after the last spring frost.
Zone 4a (-30 to -25°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 Lankin, not a forecast for this year.
Stretching the season past the first frost
Lankin'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 Lankin's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Lankin against the rest of the dataset
Lankin's growing season runs about 138 days, ranking 37,476 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 201 of 405.
Learn more
Two guides worth reading on 58250: local microclimates, on what one yard in Lankin can differ from the 58250 normal, and zone vs. frost date, on why Zone 4a and Lankin's frost date answer different questions.