Plum City, WI 54761 Frost Dates
54761, near Plum City, WI: the frost window
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/10, roughly 162 days after the last spring frost.
Plum City sits in USDA Zone 4b (-25 to -20°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
Plum City'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.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Plum City against the rest of the dataset
At roughly 162 frost-free days, Plum City places 31,834 of 40,283 ZIP codes in this dataset. Within WI, it ranks 284 of 860.
Learn more
Two guides worth reading on 54761: the frost range, on how to read the range around Plum City's dates instead of trusting one, and local microclimates, on what one yard in Plum City can differ from the 54761 normal.