GLEN LYN, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1914 To Year=2006
Station:(443397) GLEN LYN
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
65 907 777 626 296 94 12 1 4 55 265 584 879 4501
60 752 636 477 183 39 2 0 1 18 148 439 724 3419
57 660 552 392 128 20 1 0 0 8 96 357 632 2846
55 599 497 340 98 12 0 0 0 4 69 305 572 2496
50 454 366 222 41 2 0 0 0 0 25 190 426 1726
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