Sandborn, IN 47578 Frost Dates
47578, near Sandborn, IN: the frost window
Typically, the last spring freeze lands around 04/09, roughly 224 days out. Fall's first freeze usually shows up around 10/25, roughly 197 days after the last spring frost.
Sandborn 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
Sandborn'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.
Why 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Sandborn against the rest of the dataset
At roughly 197 frost-free days, Sandborn places 18,811 of 40,283 ZIP codes in this dataset. Within IN, it ranks 154 of 927.
Learn more
Two guides worth reading on 47578: local microclimates, on what one yard in Sandborn can differ from the 47578 normal, and zone vs. frost date, on why Zone 6b and Sandborn's frost date answer different questions.