Cook, MN 55723 Frost Dates
55723, near Cook, MN: the frost window
The last spring frost here typically falls around 05/12, about 257 days from today. Fall's first freeze usually shows up around 10/01, roughly 138 days after the last spring frost.
Cook sits in USDA Zone 3b (-35 to -30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Cook's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/12 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 05/29 and only about 1 year in 10 sees frost after that.
Cook against the rest of the dataset
At roughly 138 frost-free days, Cook places 37,445 of 40,283 ZIP codes in this dataset. Within MN, it ranks 772 of 943.
Learn more
Two guides worth reading on 55723: the frost range, on how to read the range around Cook's dates instead of trusting one, and local microclimates, on what one yard in Cook can differ from the 55723 normal.