GANN VALLEY 4 NW, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(393217) GANN VALLEY 4 NW
From Year=1897 To Year=2009
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 7 59 243 558 839 1080 1027 687 339 53 3 4897
40 S 1 8 68 310 869 1708 2788 3816 4503 4842 4894 4897 4897
45 M 0 1 27 147 411 689 925 872 540 220 20 1 3854
45 S 0 1 28 175 586 1276 2201 3073 3613 3833 3853 3854 3854
50 M 0 0 10 79 277 540 770 717 399 126 5 0 2923
50 S 0 0 10 89 366 906 1676 2394 2792 2918 2923 2923 2923
55 M 0 0 3 36 164 394 615 563 271 61 1 0 2108
55 S 0 0 3 39 203 597 1213 1776 2046 2107 2108 2108 2108
60 M 0 0 1 13 84 259 461 410 165 23 0 0 1416
60 S 0 0 1 14 97 356 818 1228 1393 1416 1416 1416 1416
Corn Growing Degree Days
50 M 3 11 57 176 351 530 694 657 437 240 52 6 3213
50 S 3 14 71 247 598 1128 1822 2479 2915 3155 3208 3213 3213
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 Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu