Cook, MN 55703 Frost Dates
Cook, MN: when does the frost end?
Around 06/01 is the usual last spring frost, about 277 days away. Fall's first freeze usually shows up around 09/15, roughly 104 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 Cook, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Cook's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cook's last frost
06/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/18 and only about 1 year in 10 sees frost after that.
Cook against the rest of the dataset
At roughly 104 frost-free days, Cook places 39,613 of 40,283 ZIP codes in this dataset. Within MN, it ranks 921 of 943.
Learn more
Before leaning on 55703's figures: the frost range explains how to read the range around Cook's dates instead of trusting one, while local microclimates explains what one yard in Cook can differ from the 55703 normal.