Kelliher, MN 56650 Frost Dates
56650, near Kelliher, MN: the frost window
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 09/17, roughly 117 days after the last spring frost.
Zone 3b (-35 to -30°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 Kelliher, not a forecast for this year.
Stretching the season past the first frost
Kelliher'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.
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
About 117 days separate Kelliher's last and first frost, putting it 39,259 of 40,283 ZIP codes nationally. Within MN, it ranks 893 of 943.
Learn more
Two guides worth reading on 56650: zone vs. frost date, on why Zone 3b and Kelliher's frost date answer different questions, and the frost range, on how to read the range around Kelliher's dates instead of trusting one.