Bloomington, IN 47426 Frost Dates
Frost dates for Bloomington, IN, ZIP 47426
The last spring frost here typically falls around 04/15, about 230 days from today. The first fall frost typically arrives around 10/26, about 192 frost-free days later.
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.
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.
Why 04/15 isn't a guarantee
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
About 192 days separate Bloomington's last and first frost, putting it 20,139 of 40,283 ZIP codes nationally. Within IN, it ranks 218 of 927.
Learn more
zone vs. frost date explains why Zone 6b and Bloomington's frost date answer different questions, and the frost range explains how to read the range around Bloomington's dates instead of trusting one.