Brownsburg, IN 46112 Frost Dates
Frost dates for Brownsburg, IN, ZIP 46112
Around 04/12 is the usual last spring frost, about 227 days away. The first fall frost typically arrives around 10/29, about 198 frost-free days later.
The USDA Plant Hardiness Zone Map puts Brownsburg in Zone 6a (-10 to -5°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 6a around Brownsburg has about 9 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.
The actual range around Brownsburg's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brownsburg compares
About 198 days separate Brownsburg's last and first frost, putting it 18,283 of 40,283 ZIP codes nationally. Within IN, it ranks 114 of 927.
Learn more
local microclimates explains what one yard in Brownsburg can differ from the 46112 normal, and zone vs. frost date explains why Zone 6a and Brownsburg's frost date answer different questions.