Tigerton, WI 54486 Frost Dates
Tigerton, WI: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/05, roughly 150 days after the last spring frost.
Tigerton 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 5 weeks until Tigerton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Tigerton's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 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.
Tigerton against the rest of the dataset
About 150 days separate Tigerton's last and first frost, putting it 35,359 of 40,283 ZIP codes nationally. Within WI, it ranks 578 of 860.
Learn more
Before leaning on 54486's figures: zone vs. frost date explains why Zone 5a and Tigerton's frost date answer different questions, while the frost range explains how to read the range around Tigerton's dates instead of trusting one.