FREE UNION, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1955 To Year=2012
Station:(443213) FREE UNION
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
65 988 796 548 261 113 13 4 1 43 281 561 867 4474
60 833 655 403 152 45 3 0 0 10 160 412 712 3383
57 740 571 321 101 24 0 0 0 3 108 327 619 2812
55 678 515 270 75 15 0 0 0 2 81 272 558 2465
50 525 380 161 25 2 0 0 0 0 37 154 408 1693
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