Frost line depth in Howard County, IN
How deep the ground freezes in Howard County, IN
31 in. Dig to 32 in, just below the frost. Nearest NOAA station: Kokomo 3 Wsw, 3.7 mi.
Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.