New Lisbon, WI 53950 Frost Dates
Frost dates for New Lisbon, WI, ZIP 53950
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/07, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts New Lisbon 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
Zone 4b around New Lisbon 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 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Lisbon compares
About 158 days separate New Lisbon's last and first frost, putting it 32,990 of 40,283 ZIP codes nationally. Within WI, it ranks 369 of 860.
Learn more
zone vs. frost date explains why Zone 4b and New Lisbon's frost date answer different questions, and the frost range explains how to read the range around New Lisbon's dates instead of trusting one.