Montfort, WI 53569 Frost Dates
53569, near Montfort, WI: the frost window
The last spring frost here typically falls around 05/03, about 248 days from today. Fall's first freeze usually shows up around 10/07, roughly 157 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Montfort, not a forecast for this year.
Stretching the season past the first frost
Montfort's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Montfort's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 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.
Montfort against the rest of the dataset
About 157 days separate Montfort's last and first frost, putting it 33,404 of 40,283 ZIP codes nationally. Within WI, it ranks 399 of 860.
Learn more
Two guides worth reading on 53569: zone vs. frost date, on why Zone 5a and Montfort's frost date answer different questions, and the frost range, on how to read the range around Montfort's dates instead of trusting one.