Bloomington, IN 47401 Frost Dates
Bloomington, IN: when does the frost end?
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.
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
With roughly 8 weeks until Bloomington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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
Bloomington's growing season runs about 192 days, ranking 20,132 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 211 of 927.
Learn more
Before leaning on 47401's figures: zone vs. frost date explains why Zone 6b and Bloomington's frost date answer different questions, while the frost range explains how to read the range around Bloomington's dates instead of trusting one.