Butternut, WI 54527 Frost Dates
When can you plant in Butternut, WI?
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/24, about 126 frost-free days later.
Butternut sits in USDA Zone 4a (-30 to -25°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
About 4 weeks of growing season left in Butternut before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 06/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Butternut compares
At roughly 126 frost-free days, Butternut places 38,719 of 40,283 ZIP codes in this dataset. Within WI, it ranks 814 of 860.
Learn more
zone vs. frost date covers why Zone 4a and Butternut's frost date answer different questions. the frost range covers how to read the range around Butternut's dates instead of trusting one.