Milton, WI 53563 Frost Dates
Milton, WI: when does the frost end?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. Fall's first freeze usually shows up around 10/13, roughly 166 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 Milton, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Milton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Milton against the rest of the dataset
At roughly 166 frost-free days, Milton places 30,359 of 40,283 ZIP codes in this dataset. Within WI, it ranks 173 of 860.
Learn more
Before leaning on 53563's figures: local microclimates explains what one yard in Milton can differ from the 53563 normal, while zone vs. frost date explains why Zone 5b and Milton's frost date answer different questions.