Sharon, WI 53585 Frost Dates
53585, near Sharon, WI: the frost window
Typically, the last spring freeze lands around 04/28, roughly 243 days out. Fall's first freeze usually shows up around 10/14, roughly 168 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sharon in Zone 5b (-15 to -10°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
Sharon's growing season runs out in roughly 7 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 Sharon's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Sharon against the rest of the dataset
At roughly 168 frost-free days, Sharon places 29,730 of 40,283 ZIP codes in this dataset. Within WI, it ranks 146 of 860.
Learn more
Two guides worth reading on 53585: local microclimates, on what one yard in Sharon can differ from the 53585 normal, and zone vs. frost date, on why Zone 5b and Sharon's frost date answer different questions.