Long Prairie, MN 56347 Frost Dates
56347, near Long Prairie, MN: the frost window
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 09/27, roughly 134 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Long Prairie 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
Long Prairie'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 Long Prairie's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Long Prairie against the rest of the dataset
About 134 days separate Long Prairie's last and first frost, putting it 37,956 of 40,283 ZIP codes nationally. Within MN, it ranks 810 of 943.
Learn more
Two guides worth reading on 56347: the frost range, on how to read the range around Long Prairie's dates instead of trusting one, and local microclimates, on what one yard in Long Prairie can differ from the 56347 normal.