Eau Claire, MI 49126 Frost Dates
Frost dates for Eau Claire, MI, ZIP 49126
Around 05/05 is the usual last spring frost, about 250 days away. The first fall frost typically arrives around 10/15, about 161 frost-free days later.
Eau Claire sits in USDA Zone 6a (-10 to -5°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 6a around Eau Claire has about 7 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 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Eau Claire compares
About 161 days separate Eau Claire's last and first frost, putting it 32,130 of 40,283 ZIP codes nationally. Within MI, it ranks 597 of 1,153.
Learn more
zone vs. frost date explains why Zone 6a and Eau Claire's frost date answer different questions, and the frost range explains how to read the range around Eau Claire's dates instead of trusting one.