Milladore, WI 54415 Frost Dates
Frost dates for Milladore, WI, ZIP 54415
Around 05/05 is the usual last spring frost, about 250 days away. The first fall frost typically arrives around 10/05, about 150 frost-free days later.
Zone 4b (-25 to -20°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 Milladore, not a forecast for this year.
What to do before the first frost
Zone 4b around Milladore 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.
The actual range around Milladore's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Milladore compares
At roughly 150 frost-free days, Milladore places 35,415 of 40,283 ZIP codes in this dataset. Within WI, it ranks 589 of 860.
Learn more
zone vs. frost date explains why Zone 4b and Milladore's frost date answer different questions, and the frost range explains how to read the range around Milladore's dates instead of trusting one.