Milltown, IN 47115 Frost Dates
47115, near Milltown, IN: the frost window
Typically, the last spring freeze lands around 04/21, roughly 236 days out. Fall's first freeze usually shows up around 10/18, roughly 178 days after the last spring frost.
Milltown sits in USDA Zone 6b (-5 to 0°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.
Stretching the season past the first frost
Milltown'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.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Milltown against the rest of the dataset
About 178 days separate Milltown's last and first frost, putting it 25,841 of 40,283 ZIP codes nationally. Within IN, it ranks 603 of 927.
Learn more
Two guides worth reading on 47115: local microclimates, on what one yard in Milltown can differ from the 47115 normal, and zone vs. frost date, on why Zone 6b and Milltown's frost date answer different questions.