Energy Update  01/11/2021 (Plain Text Version)


In this issue: 
WeatherWashington, D.C. Area Cooling/Heating Degree Days
Cooling degree day (CDD) data is for the Washington, D.C. area and is calculated by comparing the day’s average temperature to a 65degree baseline. If the day’s average temperature is below 65, there are no cooling degree days that day. If the day’s average temperature is greater than 65 degrees, then subtract 65 from the average temperature to find the number of cooling degree days. **Heating degree day (HDD) data is for the Washington, D.C. area and is calculated by comparing the day’s average temperature to a 65 degree baseline. If the day’s average temperature is above 65, there are no heating degree days that day. If the day’s average temperature is less than 65 degrees, then subtract that average temperature from 65 to find the number of heating degree days. 