Bloomington, IN 47407 Frost Dates
47407, near Bloomington, IN: the frost window
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/26, roughly 192 days after the last spring frost.
Zone 6b (-5 to 0°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 Bloomington, not a forecast for this year.
Stretching the season past the first frost
Bloomington'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
04/15 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 05/03 and only about 1 year in 10 sees frost after that.
Bloomington against the rest of the dataset
At roughly 192 frost-free days, Bloomington places 20,137 of 40,283 ZIP codes in this dataset. Within IN, it ranks 216 of 927.
Learn more
Two guides worth reading on 47407: local microclimates, on what one yard in Bloomington can differ from the 47407 normal, and zone vs. frost date, on why Zone 6b and Bloomington's frost date answer different questions.