Summitville, IN 46070 Frost Dates
46070, near Summitville, IN: the frost window
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/23, roughly 186 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Summitville, not a forecast for this year.
Stretching the season past the first frost
Summitville'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
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Summitville against the rest of the dataset
About 186 days separate Summitville's last and first frost, putting it 22,885 of 40,283 ZIP codes nationally. Within IN, it ranks 338 of 927.
Learn more
Two guides worth reading on 46070: local microclimates, on what one yard in Summitville can differ from the 46070 normal, and zone vs. frost date, on why Zone 6a and Summitville's frost date answer different questions.