GLEN LYN, VIRGINIA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1914 To Year=2006
Station:(443397) GLEN LYN
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 3 3 24 116 307 495 602 572 372 131 22 3 2650
57 1 1 15 87 253 436 540 510 316 95 14 1 2270
60 0 0 7 51 179 347 447 417 236 54 6 0 1747
65 0 0 1 14 80 207 293 266 123 17 1 0 1002
70 0 0 0 2 19 90 149 128 46 3 0 0 437
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