Year-to-date Temperature Anomalies

"The first six months of 2012 were the warmest on record for the contiguous United States as a whole, and for many locations across the United States. The following table shows, for about 150 long-term stations, how Jan-Jun 2012 stacks up against normal, and where it ranks among that station's history. The unusualness score is based upon the number of standard deviations difference between the 2012 value and the station's average, based on the station's history..."