LEWES, DELAWARE

Period of Record General Climate Summary - Cooling Degree Days

From Year=1945 To Year=2011
Station:(075320) LEWES
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 5 5 25 93 265 512 668 628 432 169 45 8 2856
57 3 3 18 69 215 452 606 566 374 129 31 5 2471
60 1 1 10 43 150 364 513 473 289 81 16 2 1944
65 0 0 3 17 71 228 359 319 163 30 4 0 1196
70 0 0 1 5 25 119 212 179 72 9 0 0 622
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