Oconto Falls, WI 54101 Frost Dates
Frost dates for Oconto Falls, WI, ZIP 54101
Typically, the last spring freeze lands around 05/09, roughly 254 days out. The first fall frost typically arrives around 10/06, about 150 frost-free days later.
The USDA Plant Hardiness Zone Map puts Oconto Falls 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 Oconto Falls has about 6 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.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oconto Falls compares
About 150 days separate Oconto Falls's last and first frost, putting it 35,296 of 40,283 ZIP codes nationally. Within WI, it ranks 565 of 860.
Learn more
zone vs. frost date explains why Zone 5a and Oconto Falls's frost date answer different questions, and the frost range explains how to read the range around Oconto Falls's dates instead of trusting one.