Millersburg, IN 46543 Frost Dates
46543, near Millersburg, IN: the frost window
The last spring frost here typically falls around 04/28, about 243 days from today. Fall's first freeze usually shows up around 10/19, roughly 171 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Millersburg in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Millersburg's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Millersburg against the rest of the dataset
Millersburg's growing season runs about 171 days, ranking 28,733 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 771 of 927.
Learn more
Two guides worth reading on 46543: zone vs. frost date, on why Zone 6a and Millersburg's frost date answer different questions, and the frost range, on how to read the range around Millersburg's dates instead of trusting one.