RICHMOND WSO AIRPORT, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1948 To Year=2012
Station:(447201) RICHMOND WSO AIRPORT
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
65 852 704 535 248 76 6 0 1 29 217 466 762 3896
60 698 565 393 145 26 1 0 0 7 116 330 610 2892
57 608 484 314 95 11 0 0 0 2 71 257 521 2363
55 549 431 265 68 5 0 0 0 1 48 212 463 2043
50 407 306 158 24 0 0 0 0 0 14 119 326 1354
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