NOAA reports 2006 warmest year on record for US.

The 2006 average annual temperature for the contiguous U.S. was the warmest on record and nearly identical to the record set in 1998, according to scientists at the NOAA National Climatic Data Center in Asheville, N.C. Seven months in 2006 were much warmer than average, including December, which ended as the fourth warmest December since records began in 1895. (Click NOAA image for larger view of U.S. state temperature rankings for 2006.