Bloomington, IN 47458 Frost Dates
47458, near Bloomington, IN: the frost window
The last spring frost here typically falls around 04/15, about 230 days from today. Fall's first freeze usually shows up around 10/26, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bloomington in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
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.
The actual range around Bloomington's last frost
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
About 192 days separate Bloomington's last and first frost, putting it 20,140 of 40,283 ZIP codes nationally. Within IN, it ranks 219 of 927.
Learn more
Two guides worth reading on 47458: local microclimates, on what one yard in Bloomington can differ from the 47458 normal, and zone vs. frost date, on why Zone 6b and Bloomington's frost date answer different questions.