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Annual Mean Temperature Anomalies 1901-2005

Map of the United States, depicting annual mean temperature anomalies from 1901 to 2005. The map shows which areas of the country that have warmed or cooled during this period. Warming occurred throughout most of the U.S. during this period, with all but three of the eleven climate regions showing an increase of more than 1°F since 1901. The greatest temperature increase occurred in Alaska (3.3°F per century). The Southeast experienced a very slight cooling trend over the entire period (-0.04°F per century), but shows warming since 1979.
Red shades indicate warming over the period and blue shades indicate cooling over the period.
Data courtesy NOAA's National Climatic Data Center.

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