Bloomington, IN 47408 Frost Dates
Frost dates for Bloomington, IN, ZIP 47408
Around 04/15 is the usual last spring frost, about 230 days away. The first fall frost typically arrives around 10/26, about 192 frost-free days later.
Bloomington 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.
What to do before the first frost
Zone 6b around Bloomington has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bloomington compares
At roughly 192 frost-free days, Bloomington places 20,138 of 40,283 ZIP codes in this dataset. Within IN, it ranks 217 of 927.
Learn more
the frost range explains how to read the range around Bloomington's dates instead of trusting one, and local microclimates explains what one yard in Bloomington can differ from the 47408 normal.