Littlefork, MN 56654 Frost Dates
Littlefork, MN: when does the frost end?
Around 05/23 is the usual last spring frost, about 268 days away. Fall's first freeze usually shows up around 09/21, roughly 118 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Littlefork in Zone 3a (-40 to -35°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
With roughly 3 weeks until Littlefork's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/23 isn't a guarantee
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Littlefork against the rest of the dataset
Littlefork's growing season runs about 118 days, ranking 39,223 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 888 of 943.
Learn more
Before leaning on 56654's figures: zone vs. frost date explains why Zone 3a and Littlefork's frost date answer different questions, while the frost range explains how to read the range around Littlefork's dates instead of trusting one.