Cornell, WI 54774 Frost Dates
Frost dates for Cornell, WI, ZIP 54774
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/08, about 158 frost-free days later.
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.
What to do before the first frost
Zone 4b around Cornell has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cornell compares
About 158 days separate Cornell's last and first frost, putting it 33,034 of 40,283 ZIP codes nationally. Within WI, it ranks 374 of 860.
Learn more
local microclimates explains what one yard in Cornell can differ from the 54774 normal, and zone vs. frost date explains why Zone 4b and Cornell's frost date answer different questions.