WILMINGTON PORTER RSVR, DELAWARE

Period of Record General Climate Summary - Heating Degree Days

From Year=1931 To Year=2012
Station:(079605) WILMINGTON PORTER RSVR
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 1024 888 719 395 141 18 1 3 56 291 577 913 5024
60 869 747 567 263 60 3 0 0 18 169 431 758 3884
57 776 662 478 192 30 1 0 0 7 112 348 665 3272
55 715 606 420 150 17 0 0 0 4 81 296 604 2893
50 563 468 285 67 3 0 0 0 0 29 180 454 2048
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