Sleepy Eye, MN 56085 Frost Dates
56085, near Sleepy Eye, MN: the frost window
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/07, roughly 161 days after the last spring frost.
Zone 5a (-20 to -15°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 Sleepy Eye, not a forecast for this year.
Stretching the season past the first frost
Sleepy Eye'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 Sleepy Eye's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 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.
Sleepy Eye against the rest of the dataset
About 161 days separate Sleepy Eye's last and first frost, putting it 32,047 of 40,283 ZIP codes nationally. Within MN, it ranks 200 of 943.
Learn more
Two guides worth reading on 56085: zone vs. frost date, on why Zone 5a and Sleepy Eye's frost date answer different questions, and the frost range, on how to read the range around Sleepy Eye's dates instead of trusting one.