Oakfield, WI 54936 Frost Dates
Frost dates for Oakfield, WI, ZIP 54936
Around 05/01 is the usual last spring frost, about 246 days away. The first fall frost typically arrives around 10/10, about 160 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Oakfield, not a forecast for this year.
What to do before the first frost
Zone 5b around Oakfield 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 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 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 Oakfield compares
At roughly 160 frost-free days, Oakfield places 32,432 of 40,283 ZIP codes in this dataset. Within WI, it ranks 349 of 860.
Learn more
the frost range explains how to read the range around Oakfield's dates instead of trusting one, and local microclimates explains what one yard in Oakfield can differ from the 54936 normal.