Mount Horeb, WI 53572 Frost Dates
Frost dates for Mount Horeb, WI, ZIP 53572
The last spring frost here typically falls around 05/07, about 252 days from today. The first fall frost typically arrives around 10/01, about 148 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mount Horeb 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
Zone 5a around Mount Horeb has about 5 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
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Horeb compares
At roughly 148 frost-free days, Mount Horeb places 35,699 of 40,283 ZIP codes in this dataset. Within WI, it ranks 605 of 860.
Learn more
zone vs. frost date explains why Zone 5a and Mount Horeb's frost date answer different questions, and the frost range explains how to read the range around Mount Horeb's dates instead of trusting one.