Mishicot, WI 54240 Frost Dates
54240, near Mishicot, WI: the frost window
Around 05/06 is the usual last spring frost, about 251 days away. Fall's first freeze usually shows up around 10/12, roughly 158 days after the last spring frost.
Zone 5b (-15 to -10°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 Mishicot, not a forecast for this year.
Stretching the season past the first frost
Mishicot'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 Mishicot's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Mishicot against the rest of the dataset
About 158 days separate Mishicot's last and first frost, putting it 33,036 of 40,283 ZIP codes nationally. Within WI, it ranks 375 of 860.
Learn more
Two guides worth reading on 54240: zone vs. frost date, on why Zone 5b and Mishicot's frost date answer different questions, and the frost range, on how to read the range around Mishicot's dates instead of trusting one.