Loyal, WI 54446 Frost Dates
Frost dates for Loyal, WI, ZIP 54446
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 09/26, about 136 frost-free days later.
Loyal 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 Loyal has about 4 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.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Loyal compares
About 136 days separate Loyal's last and first frost, putting it 37,716 of 40,283 ZIP codes nationally. Within WI, it ranks 759 of 860.
Learn more
zone vs. frost date explains why Zone 4b and Loyal's frost date answer different questions, and the frost range explains how to read the range around Loyal's dates instead of trusting one.