Rudolph, WI 54475 Frost Dates
Rudolph, WI: when does the frost end?
Around 05/09 is the usual last spring frost, about 254 days away. Fall's first freeze usually shows up around 09/30, roughly 142 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Rudolph in Zone 4b (-25 to -20°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 5 weeks until Rudolph's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rudolph's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/24 and only about 1 year in 10 sees frost after that.
Rudolph against the rest of the dataset
About 142 days separate Rudolph's last and first frost, putting it 36,794 of 40,283 ZIP codes nationally. Within WI, it ranks 701 of 860.
Learn more
Before leaning on 54475's figures: the frost range explains how to read the range around Rudolph's dates instead of trusting one, while local microclimates explains what one yard in Rudolph can differ from the 54475 normal.