VIENNA TYSONS CORNER, VIRGINIA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1925 To Year=2012
Station:(448737) VIENNA TYSONS CORNER
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 5 3 25 98 234 474 604 588 357 102 22 4 2514
57 3 2 17 73 187 414 542 526 300 72 13 3 2151
60 1 0 9 46 125 327 449 433 218 41 6 1 1657
65 0 0 3 19 55 193 295 279 104 13 2 0 962
70 0 0 1 7 17 89 153 139 32 2 0 0 440
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