Morristown, IN 46161 Frost Dates
46161, near Morristown, IN: the frost window
Around 04/14 is the usual last spring frost, about 229 days away. Fall's first freeze usually shows up around 10/23, roughly 191 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Morristown 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
Morristown's growing season runs out in roughly 8 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
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Morristown against the rest of the dataset
About 191 days separate Morristown's last and first frost, putting it 20,824 of 40,283 ZIP codes nationally. Within IN, it ranks 241 of 927.
Learn more
Two guides worth reading on 46161: zone vs. frost date, on why Zone 6a and Morristown's frost date answer different questions, and the frost range, on how to read the range around Morristown's dates instead of trusting one.