Necedah, WI 54646 Frost Dates
54646, near Necedah, WI: the frost window
The last spring frost here typically falls around 05/17, about 262 days from today. Fall's first freeze usually shows up around 09/25, roughly 131 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Necedah in Zone 4b (-25 to -20°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
Necedah'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
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Necedah against the rest of the dataset
Necedah's growing season runs about 131 days, ranking 38,310 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 797 of 860.
Learn more
Two guides worth reading on 54646: the frost range, on how to read the range around Necedah's dates instead of trusting one, and local microclimates, on what one yard in Necedah can differ from the 54646 normal.