How weather affects my billWhat is a Degree Day?
It's a standard weather calculation that compares how energy usage correlates to the outside temperature. The higher the number of degree days, the more the outside temperature is impacting your energy usage.
Degree days are based on how much the average daily outdoor temperature varies from the standard temperature of 65 degrees.
So, the colder or hotter the weather, the more degree days there will be. In general, energy bills increase or decrease fairly close to the same percentage that degree days increase or decrease.
Example:High temperature of the day: 40 degrees
Low temperature of the day: 10 degrees
40 + 10 divided by 2 = 25
65-25 = 40 degree days