WILLIAMSPORT, MARYLAND

Period of Record General Climate Summary - Heating Degree Days

From Year=1938 To Year=2012
Station:(189570) WILLIAMSPORT
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 1011 914 694 392 199 18 1 2 37 312 580 932 5093
60 856 772 543 259 95 5 0 0 8 183 433 777 3931
57 764 687 455 189 53 2 0 0 2 124 350 684 3309
55 702 631 398 147 34 0 0 0 0 93 296 623 2925
50 551 492 265 68 7 0 0 0 0 40 174 472 2068
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