JOHNSTON 4 SW, SOUTH CAROLINA

Period of Record General Climate Summary - Growing Degree Days

From Year=1957 To Year=2012
Station:(384607) JOHNSTON 4 SW
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 157 195 412 639 906 1089 1226 1191 982 678 407 202 8085
40 S 157 352 764 1403 2309 3399 4625 5815 6797 7475 7883 8085 8085
45 M 83 112 278 490 751 939 1071 1036 832 524 275 112 6504
45 S 83 195 473 964 1715 2654 3725 4761 5593 6117 6391 6504 6504
50 M 37 56 168 348 597 789 916 881 682 374 164 56 5067
50 S 37 93 260 608 1204 1994 2910 3790 4472 4846 5010 5067 5067
55 M 13 23 85 220 443 639 761 726 532 238 82 24 3787
55 S 13 36 121 341 784 1424 2185 2910 3442 3680 3763 3787 3787
60 M 3 6 34 120 296 490 606 571 384 127 33 8 2678
60 S 3 9 43 163 459 949 1555 2125 2510 2637 2670 2678 2678
Corn Growing Degree Days
50 M 101 132 259 406 590 730 823 804 655 431 260 131 5323
50 S 101 233 492 898 1488 2218 3042 3845 4501 4932 5192 5323 5323
Derived form the 1957-2012 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