Heating and Cooling Degree Day Data

Historical Climatological Series 5-1 (Heating Degree Days) Overview

State Population-Weighted Heating Degree Days (Base 65 Deg F)

This publication is designed to provide up-to-date heating fuel demand information on a state-wide basis. The total monthly series, by state, are available for the period 1931/32 through 1991/92: Historical Climatology Series 5-1, "State Regional and National Monthly and Seasonal Heating Degree Days Weighted by Population (1990 Census), (July 1931 - June 1992)."

The state average degree day totals for each month are derived from the divisional values by weighting each division by its percentage of the total state population as adduced from the 1990 census data (Bureau of Census, 1992). The population weighting procedure assures that degree-day averages for the states as a whole are biased toward conditions existing in the more populous sections of the states. Degree day data in this publication are presently available for the 48 conterminous states with the District of Columbia treated as part of Maryland. Upcoming data values subsequent to the June 2002 data month will use the new 2000 census data (Bureau of Census, 2002).

The information in the tables is self-explanatory and is designed to allow comparison of the energy demand for the current year to normal and to conditions in the previous year.

For inquiries or comments about this publication, please see the NCDC Contact Page.

** NOTE: Monthly Heating Degree Day values in this publication may differ from the Historical Climatology Series 5-1 due to internal computer rounding differences between the two programs.

The data presented in this monthly operational report are provisional and subject to change and/or corrections which are based on later information.

If you use any of the information from this HCS 5-1, please identify "National Climatic Data Center, NOAA" as the source.

Historical Climatological Series 5-1 (Heating Degree Days) Publication

NOTE: Click on the appropriate icon to download the PDF version of the update. In order to view or print PDF files, you must have installed the Adobe Acrobat Reader. Size of file to be downloaded is indicated. Note: Additional preliminary update of both Heating and Cooling Degree Days through June 2004 in an ASCII (text) format is available here.

	July 2002 - June 2004 ( 68 KB )
	July 2001 - June 2003 ( 68 KB )
	July 1999 - June 2001 ( 68 KB )
	July 1997- June 1999 ( 50 KB )
	July 1995 - June 1997 (71 KB)
	July 1993-June 1995 (71 KB)
	July 1992-June 1994 (577 KB)

Historical Climatological Series 5-2 (Cooling Degree Days) Overview

State Population-Weighted Cooling Degree Days (Base 65 Deg F)

This publication is designed to provide up-to-date cooling fuel demand information on a state-wide basis. The total monthly series, by state, are available for the period 1931 through 1991: Historical Climatology Series 5-2, "State Regional and National Monthly and Annual Cooling Degree Days Weighted by Population (1990 Census), (January 1931 - December 1991)."

The state average degree day totals for each month are derived from the divisional values by weighting each division by its percentage of the total state population as adduced from the 1990 census data (Bureau of Census, 1992). The population weighting procedure assures that degree-day averages for the states as a whole are biased toward conditions existing in the more populous sections of the states. Degree day data in this publication are presently available for the 48 conterminous states with the District of Columbia treated as part of Maryland. Upcoming data values beginning with the January 2003 data month will use the new 2000 census data (Bureau of Census, 2002).

The information in the tables is self-explanatory and is designed to allow comparison of the energy demand for the current year to normal and to conditions in the previous year.

For inquiries or comments about this publication, please see the NCDC Contact Page.

** NOTE: Monthly cooling degree day values in this publication may differ from the Historical Climatology Series 5-2 due to internal computer rounding differences between the two programs.

The data presented in this monthly operational report are provisional and subject to change and/or corrections which are based on later information.

If you use any of the information from this HCS 5-2, please identify "National Climatic Data Center, NOAA" as the source.

Historical Climatological Series 5-2 (Cooling Degree Days) Publication

NOTE: Click on the appropriate icon to download the PDF version of the update. In order to view or print PDF files, you must have installed the Adobe Acrobat Reader. Size of file to be downloaded is indicated. Note: Additional preliminary update of both Heating and Cooling Degree Days through June 2004 in an ASCII (text) format is available here.

	January 2003 - June 2004 (63 KB)
	January 2002 - December 2003 (63 KB)
	January 2000 - December 2001 (60 KB)
	January 1998 - December 1999 (48 KB)
	January 1996-December 1997 (67 KB)
	January 1994-December 1995 (68 KB)
	January 1992-December 1993 (689 KB)

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