North Fond du Lac, WI 54979 Frost Dates
Frost dates for North Fond du Lac, WI, ZIP 54979
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/12, about 162 frost-free days later.
North Fond du Lac sits in USDA Zone 5b (-15 to -10°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 5b around North Fond du Lac 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.
The actual range around North Fond du Lac's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How North Fond du Lac compares
About 162 days separate North Fond du Lac's last and first frost, putting it 31,710 of 40,283 ZIP codes nationally. Within WI, it ranks 264 of 860.
Learn more
the frost range explains how to read the range around North Fond du Lac's dates instead of trusting one, and local microclimates explains what one yard in North Fond du Lac can differ from the 54979 normal.