One of the big lies of 2012 is that March and July were the hottest ever in the US. According to GHCN HCN daily temperatures, those records were actually set more than 100 years ago, in 1910 and 1901.
The decade with the most record monthly maximum temperatures, was the 1930s. Ten months set their all time record below 350 ppm CO2.
Jan 2006 3.9C Feb 1954 5.7C Mar 1910 10.7C Apr 1915 13.6C May 1934 18.8C Jun 1933 22.8C Jul 1901 25.8C Aug 1936 24.5C Sep 1931 21.0C Oct 1963 12.9C Nov 1999 9.2C Dec 1939 3.7C
The 1930s also had the most daily record maximum temperatures.