Fremont, WI 54940 Frost Dates
54940, near Fremont, WI: the frost window
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/06, roughly 153 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Fremont in Zone 5a (-20 to -15°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
Fremont'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 05/04 isn't a guarantee
05/04 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 05/19 and only about 1 year in 10 sees frost after that.
Fremont against the rest of the dataset
Fremont's growing season runs about 153 days, ranking 34,586 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 510 of 860.
Learn more
Two guides worth reading on 54940: zone vs. frost date, on why Zone 5a and Fremont's frost date answer different questions, and the frost range, on how to read the range around Fremont's dates instead of trusting one.