WILMINGTON PORTER RSVR, DELAWARE

Period of Record General Climate Summary - Cooling Degree Days

From Year=1931 To Year=2012
Station:(079605) WILMINGTON PORTER RSVR
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 1 12 64 244 486 640 593 371 116 19 1 2549
57 1 0 8 46 195 427 578 531 315 85 12 1 2198
60 0 0 4 27 132 339 485 438 235 49 5 0 1714
65 0 0 1 8 58 204 331 286 123 16 1 0 1027
70 0 0 0 2 18 96 184 150 48 4 0 0 502
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