Baraboo, WI 53913 Frost Dates
Baraboo, WI: when does the frost end?
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/05, roughly 152 days after the last spring frost.
Zone 5a (-20 to -15°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 Baraboo, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Baraboo'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
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 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.
Baraboo against the rest of the dataset
Baraboo's growing season runs about 152 days, ranking 34,710 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 516 of 860.
Learn more
Before leaning on 53913's figures: zone vs. frost date explains why Zone 5a and Baraboo's frost date answer different questions, while the frost range explains how to read the range around Baraboo's dates instead of trusting one.