Nashotah, WI 53058 Frost Dates
Nashotah, WI: when does the frost end?
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/12, roughly 164 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Nashotah 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 6 weeks until Nashotah's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 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.
Nashotah against the rest of the dataset
Nashotah's growing season runs about 164 days, ranking 31,032 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 215 of 860.
Learn more
Before leaning on 53058's figures: the frost range explains how to read the range around Nashotah's dates instead of trusting one, while local microclimates explains what one yard in Nashotah can differ from the 53058 normal.