Greenville, WI 54942 Frost Dates
Greenville, WI: when does the frost end?
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/06, roughly 154 days after the last spring frost.
Greenville sits in USDA Zone 5b (-15 to -10°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
With roughly 6 weeks until Greenville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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 05/20 and only about 1 year in 10 sees frost after that.
Greenville against the rest of the dataset
About 154 days separate Greenville's last and first frost, putting it 34,235 of 40,283 ZIP codes nationally. Within WI, it ranks 467 of 860.
Learn more
Before leaning on 54942's figures: the frost range explains how to read the range around Greenville's dates instead of trusting one, while local microclimates explains what one yard in Greenville can differ from the 54942 normal.