Montreal, WI 54534 Frost Dates
Montreal, WI: when does the frost end?
Typically, the last spring freeze lands around 05/24, roughly 269 days out. Fall's first freeze usually shows up around 09/28, roughly 128 days after the last spring frost.
Montreal 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 Montreal's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/24 isn't a guarantee
05/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Montreal against the rest of the dataset
Montreal's growing season runs about 128 days, ranking 38,560 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 802 of 860.
Learn more
Before leaning on 54534's figures: zone vs. frost date explains why Zone 4a and Montreal's frost date answer different questions, while the frost range explains how to read the range around Montreal's dates instead of trusting one.