Wisconsin Dells, WI 53965 Frost Dates
Frost dates for Wisconsin Dells, WI, ZIP 53965
Typically, the last spring freeze lands around 05/08, roughly 253 days out. The first fall frost typically arrives around 10/03, about 146 frost-free days later.
The USDA Plant Hardiness Zone Map puts Wisconsin Dells 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 Wisconsin Dells 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.
The actual range around Wisconsin Dells's last frost
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 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 Wisconsin Dells compares
Wisconsin Dells's growing season runs about 146 days, ranking 36,051 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 636 of 860.
Learn more
zone vs. frost date explains why Zone 5a and Wisconsin Dells's frost date answer different questions, and the frost range explains how to read the range around Wisconsin Dells's dates instead of trusting one.