Millersburg, MI 49759 Frost Dates
Frost dates for Millersburg, MI, ZIP 49759
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 10/02, about 135 frost-free days later.
The USDA Plant Hardiness Zone Map puts Millersburg in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Millersburg 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 Millersburg's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 06/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Millersburg compares
Millersburg's growing season runs about 135 days, ranking 37,925 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 984 of 1,153.
Learn more
zone vs. frost date explains why Zone 5b and Millersburg's frost date answer different questions, and the frost range explains how to read the range around Millersburg's dates instead of trusting one.