According to the NOAA, December 2013 was only the 21st warmest out of 119. That means 98 Decembers (out of 119) were warmer.
The 5 warmest Decembers were 1939, 1957, 1933, 1941 and 1946.
OMG. 2.04°F Below Normal. We are all going to freeze to death if this keeps happening.