Thorp, WI 54771 Frost Dates
54771, near Thorp, WI: the frost window
Around 05/13 is the usual last spring frost, about 258 days away. Fall's first freeze usually shows up around 09/26, roughly 136 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Thorp 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
Thorp's growing season runs out in roughly 4 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 Thorp's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 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.
Thorp against the rest of the dataset
Thorp's growing season runs about 136 days, ranking 37,705 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 755 of 860.
Learn more
Two guides worth reading on 54771: local microclimates, on what one yard in Thorp can differ from the 54771 normal, and zone vs. frost date, on why Zone 4b and Thorp's frost date answer different questions.