Martinsville, IN 46151 Frost Dates
Frost dates for Martinsville, IN, ZIP 46151
Typically, the last spring freeze lands around 04/24, roughly 239 days out. The first fall frost typically arrives around 10/15, about 173 frost-free days later.
Martinsville 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 Martinsville 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.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 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 Martinsville compares
At roughly 173 frost-free days, Martinsville places 27,815 of 40,283 ZIP codes in this dataset. Within IN, it ranks 708 of 927.
Learn more
local microclimates explains what one yard in Martinsville can differ from the 46151 normal, and zone vs. frost date explains why Zone 6a and Martinsville's frost date answer different questions.