NINETY NINE ISLANDS, SOUTH CAROLINA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1940 To Year=2012
Station:(386293) NINETY NINE ISLANDS
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 7 44 146 346 558 695 670 459 173 39 9 3152
57 3 3 29 111 289 498 633 608 400 133 26 5 2738
60 1 1 14 67 209 408 540 515 314 83 12 2 2166
65 0 0 2 20 98 262 386 360 183 28 3 0 1343
70 0 0 0 2 28 129 233 209 78 6 0 0 686
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