Heating Degree Day information:

Links

www.Weather2000.com

www.EnergyCap.com
Click on degree day forecast, enter a NE region, then a weather station (Glens Falls/Warren Co, NY GFL). You then have the option to enter a chart value setting, or balance point. FAQ's are extremely handy.

Heating Degree Day - HDD

The number of degrees that a day's average temperature is below 65° Fahrenheit (18° Celsius), the temperature below which buildings need to be heated. The price of weather derivatives traded in the winter is based on an index made up of monthly HDD values. The settlement price for a weather futures contract is calculated by summing HDD values for a month and multiplying that sum by $20.

Notes

To calculate HDD, take the average of a day's high and low temperatures and subtract from 65. For example, if the day's average temperature is 50° F, its HDD is 15. If every day in a 30-day month had an average temperature of 50° F, the month's HDD value would be 450 (15 x 30). The nominal settlement value for this month's weather derivative contract would therefore be $9,000 (450 x $20).

Source: www.financial-dictionary.com, www.investopedia.com

Heating Degree Day ( ' h e d·i ? di ' gr e ' d a )

(meteorology) A form of degree-day used as an indication of fuel consumption; in United States usage, one heating degree-day is given for each degree that the daily mean temperature departs below the base of 65°F (where the Celsius scale is used, the base is usually 19°C).

Source: www.answers.com

What are "HDD" and "CDD"?

HDD and CDD stand for "Heating Degree Days" and "Cooling Degree Days." They are units of energy need based on a "comfortable" inside home temperature of 65 degrees. They are calculated by taking the difference between 65 degrees (F) and the average outside temperature (F) for the day.

Examples: If the average temperature (high + low divided by two) is 65 degrees, then there 0 (zero) HDD and CDD. If the average is 75, there were 10 cooling degree days (because you would have to cool your house to get it back to 65). If the average for the day is 20, then there were 45 heating degree days (because you would have to heat your house to bring it up to 65).

Source: www.accuweather.com