NOAA: September Temperature Above-Average for the U.S.

October 8, 2009

The September 2009 average temperature for the contiguous United States was above the long-term average, according to NOAA’s monthly State of the Climate report issued today. Based on records going back to 1895, the monthly National Climatic Data Center analysis is part of the suite of climate services NOAA provides.

The average September temperature of 66.4 degrees F was 1.0 degree F above the 20th Century average.  Precipitation across the contiguous United States in September averaged 2.48 inches, exactly the 1901-2000 average.

August 2009 statewide temperature ranks.

High resolution (Credit: NOAA)

U.S. Temperature Highlights

August 2009 statewide precipitation ranks.

High resolution (Credit: NOAA)

U.S. Precipitation Highlights

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.

Scientists, researchers, and leaders in government and industry use NCDC’s monthly reports to help track trends and other changes in the world's climate. The data have a wide range of practical uses, from helping farmers know what to plant, to guiding resource managers with critical decisions about water, energy and other vital assets.

NOAA understands and predicts changes in the Earth's environment, from the depths of the ocean to the surface of the sun, and conserves and manages our coastal and marine resources.