There are 862 US HCN stations which have been continuously active since at least 1930. The average summer maximum temperature has dropped almost 1.5ºF since 1930 at those stations. The summer of 2012 barely cracked the top ten. The summer of 2013 had the 13th coolest afternoons since 1930.
As CO2 has increased, summer afternoon temperatures have decreased
Government employees who claim that summers are getting hotter due to CO2 are lying. Prior to data tampering at NOAA, the data shows the exact opposite.