PORCUPINE 11 N, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(396736) PORCUPINE 11 N
From Year=1963 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 8 19 90 239 513 786 1052 1003 640 292 69 11 4722
40 S 8 27 117 355 869 1655 2707 3710 4350 4642 4711 4722 4722
45 M 1 5 42 143 369 637 897 848 495 177 29 2 3644
45 S 1 6 47 190 559 1195 2092 2940 3436 3613 3641 3644 3644
50 M 0 1 16 74 240 489 742 693 359 92 8 0 2713
50 S 0 1 17 91 330 819 1561 2254 2612 2704 2713 2713 2713
55 M 0 0 5 33 135 346 587 539 237 38 2 0 1923
55 S 0 0 5 38 173 519 1106 1645 1882 1921 1923 1923 1923
60 M 0 0 1 11 64 218 435 387 139 12 0 0 1267
60 S 0 0 1 12 76 294 728 1115 1254 1267 1267 1267 1267
Corn Growing Degree Days
50 M 14 30 95 188 329 491 663 628 423 242 80 19 3202
50 S 14 43 138 326 655 1146 1809 2438 2860 3103 3182 3202 3202
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