Horicon, WI 53032 Frost Dates
53032, near Horicon, WI: the frost window
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/10, roughly 158 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Horicon in Zone 5a (-20 to -15°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
Horicon'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.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Horicon against the rest of the dataset
Horicon's growing season runs about 158 days, ranking 32,976 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 363 of 860.
Learn more
Two guides worth reading on 53032: the frost range, on how to read the range around Horicon's dates instead of trusting one, and local microclimates, on what one yard in Horicon can differ from the 53032 normal.