Frost line depth in Payne County, OK
How deep the ground freezes in Payne County, OK
13 in. Dig to 14 in, just below the frost. Nearest NOAA station: Perkins 2nnw Mesonet, 6.9 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.