ROCKY KNOB, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1940 To Year=1975
Station:(447330) ROCKY KNOB
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
65 958 850 696 385 164 42 9 20 101 340 623 918 5105
60 803 709 546 260 81 12 1 3 42 204 475 764 3899
57 711 625 461 195 48 5 0 0 23 139 391 671 3268
55 650 569 406 158 33 3 0 0 15 103 338 610 2883
50 501 433 279 84 10 0 0 0 4 43 223 463 2039
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