JOHN FLANNAGAN RESERVOI, VIRGINIA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1969 To Year=2012
Station:(444410) JOHN FLANNAGAN RESERVOI
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 0 0 17 115 318 490 615 497 313 113 26 0 2505
57 0 0 10 84 265 430 553 435 258 81 17 0 2132
60 0 0 4 49 188 340 460 343 181 44 6 0 1616
65 0 0 0 17 84 201 306 199 82 10 0 0 900
70 0 0 0 2 21 97 158 78 22 1 0 0 379
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