1:5:10:365 EcoTip Blog

December 8, 2008

:343 Historical Heating Degree Days

Take the 1:5:10:365 challenge: Do one thing – for 5 to 10 minutes – 365 days a year to make our home and planet environment better.

1:5:10:343 EcoTip: You can use Heating Degree Day information for your area to compare the climate from year to year.


 Additional Information:

To find the Heating Degree Days for your area 

  1. Go to the National Weather Services data posting for your area. It can be located at http://www.nws.noaa.gov/organization.php?loc=interstitialskip 
  2. This next part can be a little tricky. You want to find past data. Generally you will Click on the monitoring station nearest to you and look for Past Climate Data. To get to mine – I had to go to the “Past 3 Days” page which then provided a link to “Climate – Local Historical Data”. What you want is the National Weather Service – monthly report (NWS F-6). It should go back at least six years.
  3.  Pick the month and year of interest. There should be six columns on the form, the first is the day of the month, followed by: the day’s maximum temperature, the day’s minimum temperature, the day’s average temperature, the difference from the day’s normal temperature, the heating degree days (HDD) and the cooling degree days (CDD). At the bottom of the page under the HDD column should be the total HDD for the month.
  4. By comparing the HDD for the same month for different years you can learn how the climate has compared for your area.
  5. Tomorrow’s post will be about calculating (and understanding) the current HDD.

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