Belgium, WI 53004 Frost Dates
53004, near Belgium, WI: the frost window
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/12, roughly 159 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Belgium in Zone 5b (-15 to -10°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
Belgium'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 Belgium's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Belgium against the rest of the dataset
At roughly 159 frost-free days, Belgium places 32,664 of 40,283 ZIP codes in this dataset. Within WI, it ranks 351 of 860.
Learn more
Two guides worth reading on 53004: the frost range, on how to read the range around Belgium's dates instead of trusting one, and local microclimates, on what one yard in Belgium can differ from the 53004 normal.