Hortonville, WI 54944 Frost Dates
When can you plant in Hortonville, WI?
Around 05/04 is the usual last spring frost, about 249 days away. The first fall frost typically arrives around 10/06, about 153 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hortonville in Zone 5a (-20 to -15°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 6 weeks of growing season left in Hortonville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Hortonville's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hortonville compares
At roughly 153 frost-free days, Hortonville places 34,537 of 40,283 ZIP codes in this dataset. Within WI, it ranks 504 of 860.
Learn more
the frost range covers how to read the range around Hortonville's dates instead of trusting one. local microclimates covers what one yard in Hortonville can differ from the 54944 normal.