Volume 18, Issue 10 December 13, 2021
In this Issue
Go Green While on The Go
Editor's Note
Prices Retreat on Warm Forecasts
Weather
Washington, D.C. Area Cooling/Heating Degree Days
Weather
Washington, D.C. Area Cooling/Heating Degree Days

  

 

May-21

June-21

July-21

Aug-21

Sep-21

Oct-21 

Normal 

156

351

522

445

255

55

 Actual

119

348

192

492

241

92

Departure from Normal 

24%
Cooler

1%
Cooler

6%
Cooler

11%
Warmer

6%
Cooler

69%
Warmer

Cooling degree day (CDD) 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 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.