WASHINGTON DC 3 SSW, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1944 To Year=1995
Station:(448902) WASHINGTON DC 3 SSW
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 1077 910 727 376 161 30 3 7 77 338 629 954 5289
60 922 768 574 251 74 7 0 0 28 207 484 799 4114
57 829 683 484 186 41 3 0 0 12 144 400 706 3489
55 768 627 426 148 26 1 0 0 7 109 346 645 3103
50 614 488 290 71 6 0 0 0 1 46 223 492 2231
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