FREDERICK WFMD, MARYLAND

Period of Record General Climate Summary - Heating Degree Days

From Year=1948 To Year=2012
Station:(183350) FREDERICK WFMD
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 1055 869 723 383 149 23 1 3 75 307 624 944 5156
60 900 728 571 255 66 4 0 0 27 182 477 789 4000
57 807 644 483 187 36 1 0 0 13 122 392 696 3381
55 746 588 426 147 22 0 0 0 7 90 338 635 2998
50 594 450 293 66 4 0 0 0 1 32 216 485 2140
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