Montreal, WI 54550 Frost Dates
54550, 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.
How much risk comes with planting early here
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 38,562 of 40,283 ZIP codes in this dataset. Within WI, it ranks 804 of 860.
Learn more
Two guides worth reading on 54550: local microclimates, on what one yard in Montreal can differ from the 54550 normal, and zone vs. frost date, on why Zone 4a and Montreal's frost date answer different questions.