NINETY NINE ISLANDS, SOUTH CAROLINA

Period of Record General Climate Summary - Growing Degree Days

From Year=1940 To Year=2012
Station:(386293) NINETY NINE ISLANDS
Averages Daily Extremes
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 100 128 322 540 807 1008 1160 1135 908 592 298 128 7126
40 S 100 227 549 1089 1896 2904 4065 5199 6108 6700 6999 7126 7126
45 M 46 62 198 393 652 858 1005 980 758 439 180 63 5634
45 S 46 108 305 699 1351 2209 3214 4194 4952 5391 5571 5634 5634
50 M 17 25 104 257 497 708 850 825 608 295 92 27 4307
50 S 17 42 146 403 901 1608 2459 3284 3892 4187 4280 4307 4307
55 M 5 7 44 146 346 558 695 670 459 173 39 9 3152
55 S 5 12 56 203 549 1107 1802 2472 2931 3104 3143 3152 3152
60 M 1 1 14 67 209 408 540 515 314 83 12 2 2166
60 S 1 2 15 82 291 699 1240 1755 2069 2152 2164 2166 2166
Corn Growing Degree Days
50 M 79 107 229 359 524 679 789 774 602 393 217 100 4852
50 S 79 186 415 774 1299 1977 2767 3541 4143 4536 4752 4852 4852
Derived form the 1940-2012 Data
M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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