'Obama’s assertions about abnormally high temperatures and the extent of Arctic sea ice melt are either meaningless or simply wrong. Last July, new average U.S. temperature records were set by one-fifth of a degree F. This is meaningless since the measurement uncertainty in most of the record is one-half degree Fahrenheit. Similarly, last July’s record temperature was not based on the highs of the day. A record was set merely because the nights were slightly less cool in July 2012 than those experienced in the 1930s. So, when the high and lows of the day were averaged, a record average was established. Nevertheless, the highs of the day in the 1930s still exceeded anything experienced in July 2012.'