MITCHELL 2 N, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(395671) MITCHELL
From Year=1893 To Year=2003
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 2 8 64 270 600 866 1075 1011 690 352 60 4 5003
40 S 2 9 74 344 944 1810 2886 3897 4587 4939 4999 5003 5003
45 M 0 2 30 169 450 716 920 856 543 230 23 1 3940
45 S 0 2 32 201 652 1368 2288 3144 3687 3916 3940 3940 3940
50 M 0 0 12 95 312 567 765 701 400 132 7 0 2991
50 S 0 0 12 108 419 986 1751 2452 2852 2985 2991 2991 2991
55 M 0 0 4 47 193 420 610 546 271 64 1 0 2157
55 S 0 0 4 51 244 664 1274 1820 2091 2156 2157 2157 2157
60 M 0 0 1 19 103 282 456 394 164 24 0 0 1443
60 S 0 0 1 20 123 405 861 1255 1419 1443 1443 1443 1443
Corn Growing Degree Days
50 M 4 9 54 181 369 552 703 657 435 234 52 6 3258
50 S 4 13 68 249 618 1170 1874 2531 2966 3200 3252 3258 3258
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