National Overview - August 2004


NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

Maps and Graphics:

August Most Recent 3 Months Most Recent 6 Months
Annual summary for 2003 Most Recent 12 Months US Percent Area Very Wet/Dry/Warm/Cold

It should be emphasized that all of the temperature and precipitation ranks and values are based on preliminary data. The ranks will change when the final data are processed, but will not be replaced on these pages. Graphics based on final data are available on this page: http://www.ncdc.noaa.gov/temp-and-precip/maps.php

For graphics covering periods other than those mentioned above or for tables of national, regional, and statewide data from 1895-present, for August, last 3 months or other periods, please go to the Climate At A Glance page
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National Overview:

August:

  • August temperatures were cooler than average for the contiguous nation, with only the western regions having significantly warmer than average temperatures. Both Alaska and Hawaii were also warmer than average. For information on temperature records during the month, please go to NCDC's Extremes page.

  • The precipitation signal was mixed with wetter than average conditions across much of the Northeast and Northwest and less than average precipitation in the Southwest and parts of the High Plains. For more information on drought during August, please visit the U.S. Drought page.

Summer (June-August):

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Monthly and Seasonal Highlights:

National:

  • August 2004 ranked as the 7th coldest August in the 1895 to present record. The preliminary nationally averaged temperature was 71.0°F (21.7°C), which was 1.8°F (1.0°C) below the long-term mean.
  • August 2004 had above average precipitation, nationally, ranking 22nd wettest.
For tables of national, regional, and statewide data from 1895-present, for August, last 3 months or other periods, please go to the Climate At A Glance page.
  • June-August temperature was below average and ranked as the 16th coolest such period in the 1895 to present record. The preliminary nationally averaged temperature for June-August was 71.1°F (21.7°C) which was 1.0°F (0.6°C) below the long-term mean.
  • June-August had much above average precipitation, ranking 10th wettest in the last 110 years.
  • The September 2003-August 2004 temperature was above average and ranked as the 21st warmest such period in the 1895 to present record. The preliminary nationally averaged temperature was 53.5°F (11.9°C) which was 0.7°F (0.4°C) above the long-term mean.
  • Precipitation was above average for September-August, ranking 27th wettest for the last 12 months based on a record of 109 such periods.
Regional and Statewide:

  • August 2004 temperatures ranked much below average for 15 states, including Minnesota, which had its coldest August on record. A further 16 states had below average temperature. Only Washington and Oregon had much above average temperatures in the contiguous U.S. for August 2004.
  • Alaska temperatures will not be available until later in the month, but initial indications are that it was a very warm summer in Alaska, with a warm August following a record warm May, June and July for the state.
  • August was much wetter than average for 6 states, including Washington, which had its second wettest August on record.
  • The 3 month period, June-August, was much cooler than average for 8 states and significantly cooler than average for a further 22 states. Three western states were much warmer than average for the summer.
  • June-August 2004 was dry for parts of the Southwest and northern Plains, while wetter than average conditions prevailed across much of the South to the Northeast. Seven states had much above average precipitation for the summer, including Texas, which had its second wettest June-August on record. The South region (TX, LA, MS, AR, OK, KS) had its wettest summer in 110 years of data.
  • The last 12 months were much warmer than average for 7 western states. Much of the rest of the nation had near to above average temperatures.
  • The last 12 months were record wet for Pennsylvania, with New York having its second wettest September-August. Dry conditions prevailed across parts of the Southeast, Southwest and High Plains.
See NCDC's Monthly Extremes web-page for weather and climate records for the month of August.

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It should be emphasized that all of the temperature and precipitation ranks and values are based on preliminary data. The ranks will change when the final data are processed, but will not be replaced on these pages. Graphics based on final data are available on this page: http://www.ncdc.noaa.gov/temp-and-precip/maps.php

Citing This Report

NOAA National Climatic Data Center, State of the Climate: National Overview for August 2004, published online September 2004, retrieved on August 1, 2014 from http://www.ncdc.noaa.gov/sotc/national/2004/8.