Cornell, WI 54748 Frost Dates
Cornell, WI: when does the frost end?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/08, roughly 158 days after the last spring frost.
Cornell 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
With roughly 6 weeks until Cornell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cornell's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Cornell against the rest of the dataset
At roughly 158 frost-free days, Cornell places 33,033 of 40,283 ZIP codes in this dataset. Within WI, it ranks 373 of 860.
Learn more
Before leaning on 54748's figures: local microclimates explains what one yard in Cornell can differ from the 54748 normal, while zone vs. frost date explains why Zone 4b and Cornell's frost date answer different questions.