WILLIAMSPORT, MARYLAND

Period of Record General Climate Summary - Cooling Degree Days

From Year=1938 To Year=2012
Station:(189570) WILLIAMSPORT
Averages Daily Extremes
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 1 0 14 64 176 477 631 582 393 106 16 1 2462
57 0 0 9 45 133 418 569 520 335 75 10 0 2115
60 0 0 4 26 81 331 476 427 252 41 2 0 1641
65 0 0 0 9 31 195 321 274 130 15 0 0 976
70 0 0 0 2 9 85 175 137 45 3 0 0 456
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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