Royal Center, IN 46985 Frost Dates
Frost dates for Royal Center, IN, ZIP 46985
Typically, the last spring freeze lands around 04/26, roughly 241 days out. The first fall frost typically arrives around 10/17, about 173 frost-free days later.
Royal Center 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 Royal Center 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
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 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 Royal Center compares
About 173 days separate Royal Center's last and first frost, putting it 28,018 of 40,283 ZIP codes nationally. Within IN, it ranks 733 of 927.
Learn more
zone vs. frost date explains why Zone 6a and Royal Center's frost date answer different questions, and the frost range explains how to read the range around Royal Center's dates instead of trusting one.