Somerset, WI 54025 Frost Dates
Frost dates for Somerset, WI, ZIP 54025
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/19, about 178 frost-free days later.
Somerset 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 Somerset has about 7 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
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Somerset compares
Somerset's growing season runs about 178 days, ranking 25,717 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 49 of 860.
Learn more
the frost range explains how to read the range around Somerset's dates instead of trusting one, and local microclimates explains what one yard in Somerset can differ from the 54025 normal.