Jonesboro, IN 46938 Frost Dates
Frost dates for Jonesboro, IN, ZIP 46938
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/20, about 175 frost-free days later.
Jonesboro sits in USDA Zone 6a (-10 to -5°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 6a around Jonesboro 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 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jonesboro compares
About 175 days separate Jonesboro's last and first frost, putting it 27,033 of 40,283 ZIP codes nationally. Within IN, it ranks 637 of 927.
Learn more
local microclimates explains what one yard in Jonesboro can differ from the 46938 normal, and zone vs. frost date explains why Zone 6a and Jonesboro's frost date answer different questions.