UPPER MARLBORO 3 NNW, MARYLAND

Period of Record General Climate Summary - Heating Degree Days

From Year=1956 To Year=2012
Station:(189070) UPPER MARLBORO 3 NNW
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 1004 845 668 354 135 19 1 4 58 304 553 874 4818
60 850 704 519 230 60 3 0 1 19 183 410 720 3699
57 758 620 432 167 32 1 0 0 8 125 329 628 3101
55 697 565 377 130 19 0 0 0 4 93 279 568 2731
50 547 430 249 58 3 0 0 0 0 37 167 422 1913
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