Hammond, WI 54015 Frost Dates
54015, near Hammond, WI: the frost window
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/02, roughly 148 days after the last spring frost.
Hammond 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
Hammond's growing season runs out in roughly 5 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
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Hammond against the rest of the dataset
About 148 days separate Hammond's last and first frost, putting it 35,729 of 40,283 ZIP codes nationally. Within WI, it ranks 610 of 860.
Learn more
Two guides worth reading on 54015: the frost range, on how to read the range around Hammond's dates instead of trusting one, and local microclimates, on what one yard in Hammond can differ from the 54015 normal.