VIENNA TYSONS CORNER, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1925 To Year=2012
Station:(448737) VIENNA TYSONS CORNER
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
65 953 799 655 335 151 20 1 2 50 312 546 870 4694
60 799 658 506 212 67 4 0 0 14 185 401 716 3562
57 708 575 421 149 35 1 0 0 6 124 318 624 2961
55 648 520 367 114 20 0 0 0 3 91 267 564 2593
50 501 385 242 47 4 0 0 0 0 34 155 417 1786
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