Kelliher, MN 56685 Frost Dates
Kelliher, MN: when does the frost end?
Around 05/22 is the usual last spring frost, about 267 days away. Fall's first freeze usually shows up around 09/17, roughly 117 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Kelliher in Zone 3b (-35 to -30°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 Kelliher's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/22 isn't a guarantee
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 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.
Kelliher against the rest of the dataset
At roughly 117 frost-free days, Kelliher places 39,260 of 40,283 ZIP codes in this dataset. Within MN, it ranks 894 of 943.
Learn more
Before leaning on 56685's figures: zone vs. frost date explains why Zone 3b and Kelliher's frost date answer different questions, while the frost range explains how to read the range around Kelliher's dates instead of trusting one.