Cobb, WI 53526 Frost Dates
Cobb, WI: when does the frost end?
Typically, the last spring freeze lands around 05/03, roughly 248 days out. Fall's first freeze usually shows up around 10/07, roughly 157 days after the last spring frost.
Cobb sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 6 weeks until Cobb's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 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.
Cobb against the rest of the dataset
About 157 days separate Cobb's last and first frost, putting it 33,424 of 40,283 ZIP codes nationally. Within WI, it ranks 405 of 860.
Learn more
Before leaning on 53526's figures: the frost range explains how to read the range around Cobb's dates instead of trusting one, while local microclimates explains what one yard in Cobb can differ from the 53526 normal.