Woodburn, IN 46797 Frost Dates
Frost dates for Woodburn, IN, ZIP 46797
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/19, about 174 frost-free days later.
The USDA Plant Hardiness Zone Map puts Woodburn 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 Woodburn has about 7 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
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Woodburn compares
At roughly 174 frost-free days, Woodburn places 27,522 of 40,283 ZIP codes in this dataset. Within IN, it ranks 665 of 927.
Learn more
local microclimates explains what one yard in Woodburn can differ from the 46797 normal, and zone vs. frost date explains why Zone 6a and Woodburn's frost date answer different questions.