SULLIVANS ISLAND, SOUTH CAROLINA

Period of Record General Climate Summary - Heating Degree Days

From Year=1951 To Year=2012
Station:(388405) SULLIVANS ISLAND
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
65 499 398 256 77 8 0 0 0 1 45 195 410 1889
60 352 265 142 26 1 0 0 0 0 13 100 272 1171
57 271 195 92 11 0 0 0 0 0 6 61 200 836
55 222 154 67 6 0 0 0 0 0 3 41 158 651
50 122 74 25 1 0 0 0 0 0 0 12 77 311
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