Montreal, WI 54536 Frost Dates
54536, near Montreal, WI: the frost window
Around 05/24 is the usual last spring frost, about 269 days away. Fall's first freeze usually shows up around 09/28, roughly 128 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Montreal in Zone 4a (-30 to -25°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
Montreal's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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
At roughly 128 frost-free days, Montreal places 38,561 of 40,283 ZIP codes in this dataset. Within WI, it ranks 803 of 860.
Learn more
Two guides worth reading on 54536: the frost range, on how to read the range around Montreal's dates instead of trusting one, and local microclimates, on what one yard in Montreal can differ from the 54536 normal.