RALEIGH 4 SW, NORTH CAROLINA

Period of Record General Climate Summary - Heating Degree Days

From Year=1892 To Year=2010
Station:(317074) RALEIGH 4 SW
Averages Daily Extremes
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 722 603 426 194 46 4 0 0 17 159 401 662 3234
60 571 466 292 106 14 0 0 0 3 77 271 512 2312
57 483 388 222 67 5 0 0 0 1 44 203 425 1840
55 427 338 181 47 2 0 0 0 0 29 163 371 1559
50 297 225 98 16 0 0 0 0 0 8 84 246 973
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster