Frost line depth in Clinton County, NY
How deep the ground freezes in Clinton County, NY
45 in. Dig to 46 in, just below the frost. Nearest NOAA station: Dannemora, 2.4 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.