A degree day is defined as the number of degrees that the mean outdoor temperature for any given day is over or below 65° F. For example, if the average outdoor temperature for the day is 40° F then the math looks like this: 65° F - 40° F = 25 heating degree days (HDD) because it is likely that your heating system was on. If the average outdoor temperature for the day is 85°F then the math looks like this: 85° F - 65° F = 20 cooling degree days (CDD) because it is likely that your cooling system was on. Degree day data is a useful tool in many applications. Historical degree day data is used by heating and air conditioning professionals to assist with HVAC equipment sizing. Degree day data is also useful in analyzing energy use by determining the relation of energy consumption to outdoor temperatures.
The following degree day data is based on Rocky Mount meteorological readings. Reports are updated monthly.
You may also generate your own report.