DEGREE DAY
degree day: translation
Term created to assess and acknowledge expected demand for energy. A degree day value is the difference between a day's average temperature and a previously set temperature ( in the U.S., 65 degrees Fahrenheit). Degree days above 65 degrees are called Cooling Degree Days because they are days when people are likely to use energy for air conditioning. Heating Degree Days refer to days when people are likely to use energy for heating. Chicago Mercantile Exchange Glossary