Darwin, MN 55324 Frost Dates
55324, near Darwin, MN: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/10, roughly 162 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Darwin in Zone 4b (-25 to -20°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
Darwin's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Darwin's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Darwin against the rest of the dataset
At roughly 162 frost-free days, Darwin places 31,856 of 40,283 ZIP codes in this dataset. Within MN, it ranks 186 of 943.
Learn more
Two guides worth reading on 55324: zone vs. frost date, on why Zone 4b and Darwin's frost date answer different questions, and the frost range, on how to read the range around Darwin's dates instead of trusting one.