NOAA: April Temperatures Slightly Cooler Than Average for U.S.

May 8, 2009

The April 2009 temperature for the contiguous United States was below the long-term average, based on records going back to 1895, according to an analysis by NOAA’s National Climatic Data Center in Asheville, NC. 

The average April temperature of 51.2 degrees F was 0.8 degree F below the 20th Century average.  Precipitation across the contiguous United States in April averaged 2.62 inches, which is 0.19 inch above the 1901-2000 average.

U.S. Temperature Highlights

March 2009 Statewide Temperature ranks.

High resolution (Credit: NOAA)

U.S. Precipitation Highlights

March 2009 Statewide Precipitation ranks.

High resolution (Credit: NOAA)

About 21 percent of the contiguous United States had moderately-to-extremely wet conditions at the end of April, according to the Palmer Index (a well-known index that measures both drought intensity and wet spell intensity). 

Other Highlights

NCDC’s preliminary reports, which assess the current state of the climate, are released soon after the end of each month. These analyses are based on preliminary data, which are subject to revision. Additional quality control is applied to the data when late reports are received several weeks after the end of the month and as increased scientific methods improve NCDC’s processing algorithms.

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