Caledonia, WI 53108 Frost Dates
53108, near Caledonia, WI: the frost window
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/26, roughly 184 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 Caledonia, not a forecast for this year.
Stretching the season past the first frost
Caledonia's growing season runs out in roughly 8 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
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Caledonia against the rest of the dataset
At roughly 184 frost-free days, Caledonia places 23,435 of 40,283 ZIP codes in this dataset. Within WI, it ranks 14 of 860.
Learn more
Two guides worth reading on 53108: local microclimates, on what one yard in Caledonia can differ from the 53108 normal, and zone vs. frost date, on why Zone 5b and Caledonia's frost date answer different questions.