It's official: 2012 was the hottest year ever in the U.S.

Last year was pretty messed up as far as weather was concerned in the United States, and now we have the numbers to show why. According to the National Climatic Data Center in Asheville, N.C., the average temperature in 2012 was 55.3 degrees Fahrenheit (12.94 degrees Celcius) — an entire degree higher than the… » 1/09/13 12:42pm 1/09/13 12:42pm