Mount Calvary, WI 53049 Frost Dates
Mount Calvary, WI: when does the frost end?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/12, roughly 162 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mount Calvary 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 Mount Calvary's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Mount Calvary's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 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.
Mount Calvary against the rest of the dataset
Mount Calvary's growing season runs about 162 days, ranking 31,841 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 285 of 860.
Learn more
Before leaning on 53049's figures: zone vs. frost date explains why Zone 5b and Mount Calvary's frost date answer different questions, while the frost range explains how to read the range around Mount Calvary's dates instead of trusting one.