Gilman, WI 54433 Frost Dates
Gilman, WI: when does the frost end?
Typically, the last spring freeze lands around 05/20, roughly 265 days out. Fall's first freeze usually shows up around 09/23, roughly 125 days after the last spring frost.
Gilman sits in USDA Zone 4a (-30 to -25°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 4 weeks until Gilman'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
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Gilman against the rest of the dataset
About 125 days separate Gilman's last and first frost, putting it 38,803 of 40,283 ZIP codes nationally. Within WI, it ranks 820 of 860.
Learn more
Before leaning on 54433's figures: zone vs. frost date explains why Zone 4a and Gilman's frost date answer different questions, while the frost range explains how to read the range around Gilman's dates instead of trusting one.