Winter, WI 54896 Frost Dates
54896, near Winter, WI: the frost window
Around 05/07 is the usual last spring frost, about 252 days away. Fall's first freeze usually shows up around 10/03, roughly 147 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Winter in Zone 4a (-30 to -25°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
Winter'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.
Why 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Winter against the rest of the dataset
About 147 days separate Winter's last and first frost, putting it 35,973 of 40,283 ZIP codes nationally. Within WI, it ranks 630 of 860.
Learn more
Two guides worth reading on 54896: zone vs. frost date, on why Zone 4a and Winter's frost date answer different questions, and the frost range, on how to read the range around Winter's dates instead of trusting one.