New Auburn, WI 54757 Frost Dates
Frost dates for New Auburn, WI, ZIP 54757
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/03, about 151 frost-free days later.
New Auburn sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4b around New Auburn 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.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 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 New Auburn compares
At roughly 151 frost-free days, New Auburn places 35,125 of 40,283 ZIP codes in this dataset. Within WI, it ranks 551 of 860.
Learn more
local microclimates explains what one yard in New Auburn can differ from the 54757 normal, and zone vs. frost date explains why Zone 4b and New Auburn's frost date answer different questions.