National Climate Report - Annual 2012
Year-to-Date Temperature Evolution
This time series shows the 2012 year-to-date temperature evoluation through December, which was the warmest year on record for the lower 48. The year-to-date evolution of the contiguous U.S. temperatures for each year back to 1895 are also shown, with the five warmest and five coolest years highlighted. The January-December 2012 contiguous U.S. average temperature was 55.3°F, 3.3°F above average, and 1.0°F warmer than the previous record warm year in 1998. The data for 2012 are preliminary.