LEWES, DELAWARE

Period of Record General Climate Summary - Heating Degree Days

From Year=1945 To Year=2011
Station:(075320) LEWES
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
65 888 768 634 343 130 17 1 2 32 217 471 778 4279
60 734 628 486 220 53 3 0 0 8 112 333 625 3201
57 643 545 401 156 25 1 0 0 3 68 257 535 2632
55 583 490 346 119 14 0 0 0 1 46 212 476 2287
50 438 359 221 49 2 0 0 0 0 13 117 336 1535
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