Oakfield, WI 53065 Frost Dates
Frost dates for Oakfield, WI, ZIP 53065
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 5a (-20 to -15°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 5a 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.
The actual range around Oakfield's last frost
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
Oakfield's growing season runs about 160 days, ranking 32,431 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 348 of 860.
Learn more
zone vs. frost date explains why Zone 5a and Oakfield's frost date answer different questions, and the frost range explains how to read the range around Oakfield's dates instead of trusting one.