Rockville, IN 47872 Frost Dates
Frost dates for Rockville, IN, ZIP 47872
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/12, about 164 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Rockville, not a forecast for this year.
What to do before the first frost
Zone 6a around Rockville has about 6 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 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rockville compares
About 164 days separate Rockville's last and first frost, putting it 30,963 of 40,283 ZIP codes nationally. Within IN, it ranks 873 of 927.
Learn more
the frost range explains how to read the range around Rockville's dates instead of trusting one, and local microclimates explains what one yard in Rockville can differ from the 47872 normal.