Mentone, IN 46539 Frost Dates
Frost dates for Mentone, IN, ZIP 46539
The last spring frost here typically falls around 04/23, about 238 days from today. The first fall frost typically arrives around 10/21, about 180 frost-free days later.
Mentone 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 Mentone 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 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mentone compares
About 180 days separate Mentone's last and first frost, putting it 24,969 of 40,283 ZIP codes nationally. Within IN, it ranks 502 of 927.
Learn more
the frost range explains how to read the range around Mentone's dates instead of trusting one, and local microclimates explains what one yard in Mentone can differ from the 46539 normal.