BACK BAY WILDLIFE REFUG, VIRGINIA

Period of Record General Climate Summary - Heating Degree Days

From Year=1953 To Year=2012
Station:(440385) BACK BAY WILDLIFE REFUG
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
65 767 652 497 245 74 4 0 0 5 105 331 626 3306
60 612 512 352 138 23 0 0 0 0 41 203 473 2356
57 521 430 273 88 9 0 0 0 0 20 140 386 1868
55 462 377 223 62 5 0 0 0 0 12 105 330 1576
50 322 254 121 19 0 0 0 0 0 2 44 207 970
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