DALECARLIA RESVR DC, MARYLAND

Period of Record General Climate Summary - Heating Degree Days

From Year=1948 To Year=2012
Station:(182325) DALECARLIA RESVR DC
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
65 948 786 612 295 98 9 0 1 38 253 528 849 4417
60 793 646 464 180 38 1 0 0 11 141 384 695 3354
57 701 562 379 124 18 0 0 0 4 90 304 603 2787
55 641 507 325 92 10 0 0 0 2 64 254 543 2438
50 492 374 204 37 1 0 0 0 0 21 147 396 1674
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