Sullivan, IN 47852 Frost Dates
47852, near Sullivan, IN: the frost window
Around 04/12 is the usual last spring frost, about 227 days away. Fall's first freeze usually shows up around 10/22, roughly 193 days after the last spring frost.
Sullivan 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
Sullivan'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
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Sullivan against the rest of the dataset
About 193 days separate Sullivan's last and first frost, putting it 19,891 of 40,283 ZIP codes nationally. Within IN, it ranks 209 of 927.
Learn more
Two guides worth reading on 47852: local microclimates, on what one yard in Sullivan can differ from the 47852 normal, and zone vs. frost date, on why Zone 6b and Sullivan's frost date answer different questions.