Sturgeon Bay, WI 54235 Frost Dates
Sturgeon Bay, WI: when does the frost end?
Around 05/08 is the usual last spring frost, about 253 days away. Fall's first freeze usually shows up around 10/13, roughly 157 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sturgeon Bay 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
With roughly 7 weeks until Sturgeon Bay'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
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Sturgeon Bay against the rest of the dataset
At roughly 157 frost-free days, Sturgeon Bay places 33,281 of 40,283 ZIP codes in this dataset. Within WI, it ranks 386 of 860.
Learn more
Before leaning on 54235's figures: zone vs. frost date explains why Zone 5b and Sturgeon Bay's frost date answer different questions, while the frost range explains how to read the range around Sturgeon Bay's dates instead of trusting one.