U.S. Composite Historical and Forecast Degree Day Data

Additional New Degree Day Data Sets ?

This degree day data set is calculated in the same manner that NOAA and some other vendors calculate their HDDs and CDDs but the resulting output data may not be identical.

Degree Days (approximate NOAA weightings)*
Regional = EIA and Census Regions
EIA/NERC Power Region Degree Days
Map of Power Regions
GWDDs
(Energy Metro Desk Formulation)
Time Resolution
U.S. Data
Regional Data
State Data
Regional Data
U.S. Data
Daily Data
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
Weekly Data
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
Monthly Data
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast
1981-2010 Averages
1981 - Forecast
Last 10 Years - Forecast
Last Year - Forecast

Population Weighted Weather Data ?

The above data sets use 230 observation sites to calculate the various population weighted data sets versus only 121 observation sites in the old data sets.

PWvbY = Population weights vary by yearly population data

PWf2010 = Population weights fixed for all years to 2010 populations

Guide to Population and Gas Weighted Degree Days

Date Range U.S. Data State Data EIA 3 Region
Click for Map
EIA 5 Region
Click for Map
NERC Region
Click for Map
NERC SubRegion
Click for Map
Census Region
Click for Map
Census SubRegion
Click for Map
1980
through
2013
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
2014
through
9 Month Forecast
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
1996
through
9 Month Forecast
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
Last 15 Days
through
15 Day Forecast
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
Last 3 Months
through
9 Month Forecast
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
Monthly
Averages/Totals
PWvbY | PWf2010
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt
PWvbY  |  PWf2010
Alt Fmt  |  Alt Fmt

Combined U.S. Degree Day Files ?

The data files combine the US gas weighted HDDs (R&C), the NG/AC weighted CDDs, the population weighted HDDs and CDDs, the electric heating weighted HDDs, and the fuel oil and propane weighted HDDs into one file. All data is based on the data files that have the weightings fixed to 2010 values (the PWf2010 versions) and also include the previous years values (relative to the year a given data value is from) along with the current 10 and 30 year averages. The 10 and 30 year averages in the entire file are valid as of this year. They are not a rolling 10 and 30 year average.

These data files update between 7:15 and 7:30 AM CT, and again at midday.

U.S. Degree Days Combo File from 1982 through the next 8 months | U.S. Degree Days Combo File for the Last 15 days and Next 15 Days
U.S. Degree Days Combo File 2 from 1982 - Forecast (additional data) | U.S. Degree Days Combo File 2 for Last 15 - Next 15 (additional data)

Natural Gas, Electric, Fuel Oil and Propane Heating Weighted HDDs and NG/AC Weighted CDDs ?

The data sets use 230 observation sites to calculate the various weighted data sets versus only 121 observation sites in the old data sets. Additionally, weighting techniques have been revised and data is now available for NG heating, electric heating, and combined NG plus electric heating where the electric heating component is weighted based on the percent of power production from NG in each power region of the country. Propane heating weighted data is also now available in addition to heating (fuel) oil weighted data. A new gas weighted CDD data set is also now available that combines the percent of homes with air conditioning with the percent of power production from natural gas in each power region.

PWvbY = Weights vary by year as a result of population and heating fuel changes

PWf2010 = Weights fixed to 2010 values

Guide to Population and Gas Weighted Degree Days

Date Range U.S. and EIA 3 Region HDD Data U.S. and EIA 5 Region HDD Data U.S. Fuel Oil & Propane Weighted HDDs PADD Region Fuel Oil, Propane, Population Weighted HDDs U.S. and EIA 3 Region CDD Data U.S. and EIA 5 Region CDD Data
1980
through
2013
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010
2014
through
9 Month Forecast
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010
1996
through
9 Month Forecast
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010
Last 15 Days
through
15 Day Forecast
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010
Last 3 Months
through
9 Month Forecast
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010
Monthly
Averages/Totals
PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010 PWvbY | PWf2010

Old Formats of Population and Gas Weighted Data

Population Weighted Natural Gas Heating Weighted Oil Heating Weighted
Daily U.S. Population Weighted Weather Data
• 1970-2011 HDDs/CDDs | Old Mthd #2 | Old Mthd #1
• 1996-Forecast HDDs/CDDs | Old Mthd #2 | Old Mthd #1
• 1996-Yesterday HDDs/CDDs Plus other weather variables
• Last 15 + 15 day forecast | Old Mthd #2 | Old Mthd #1
• Last 3 months + 9 month forecast

Daily State Population Weighted Weather Data
• 1970-2011 HDDs/CDDs (8 MB zip file)
• 1/1/2010 to 15 day forecast
• 1/1/2010 to 15 day forecast w/ other weather variables
• Last 15 + 15 day forecast
• State Population Data

Monthly State Population Weighted Weather Data
• 1971-current plus 9 month forecast
• 2010-current plus 9 month forecast

Daily Power Region Degree Day Averages
Map of Power Regions
Year to Date Power Region Averages
Last 15 days/Next 15 Days
Last 10 weeks/Next 15 Days
Power Region Forecast from 1 Week Ago

Monthly Power Region Degree Day Averages
1971 through 9 Month Forecast
Last Year through 9 Month Forecast

Click here to view data file links in previous format
Daily U.S. Gas Weighted Degree Day Averages
1970-2011 | Mthd #3 | Old Mthd #2 | Old Mthd #1
1996-Forecast | Mthd #3 | Old Mthd #2 | Old Mthd #1
Last 15 + 15 Day Forecast | Mthd #3 | Old Mthd #2 | Old Mthd #1
Last 3 months + 9 month forecast | Mthd #3

Daily Census Region Degree Day Averages
1970-2011
1996-Forecast | alternate format | Old Methodology #1
Last 15 + 15 Day Forecast | alternate format
Last 3 months + 9 month forecast | alternate format

Daily Gas Region Degree Day Averages
1970-2011 | Old Methodology #2
1996-Forecast | alternate format ( archive) | Old Methodology #2
Last 15 + 15 Day Forecast | alternate format
Last 3 months + 9 month forecast | alternate format

Monthly U.S. Degree Day Totals
U.S. 1970-2011 | Methodology #3
U.S. 1996-current plus 9 month forecast | Methodology #3

Monthly Census Region Degree Day Totals
Census Region 1970-2011
Census Region 1996-current plus 9 month forecast

Monthly Gas Region Degree Day Totals
Gas Region 1970-2011
Gas Region 1996-current plus 9 month forecast
Daily U.S. Oil Weighted Avgs
• 1970-2010
• 1996-Present
• Forecast

PADD I Averages
• 1996-Present
• Last 10 and Forecast

PADD I State Averages
• 1996-Present
• Last 10 and Forecast

NOAA Data Files
Weekly Data
• CDD Pop Weighted
• HDD Pop Weighted

Monthly Data
• CDD Pop Weighted
• HDD Pop Weighted

Archived Data
• Recent Data
• 1997-current