Unity, WI 54488 Frost Dates
When can you plant in Unity, WI?
Around 05/13 is the usual last spring frost, about 258 days away. The first fall frost typically arrives around 09/26, about 136 frost-free days later.
The USDA Plant Hardiness Zone Map puts Unity in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Unity 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
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Unity compares
At roughly 136 frost-free days, Unity places 37,777 of 40,283 ZIP codes in this dataset. Within WI, it ranks 763 of 860.
Learn more
the frost range covers how to read the range around Unity's dates instead of trusting one. local microclimates covers what one yard in Unity can differ from the 54488 normal.