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Period of Record General Climate Summary - Growing Degree Days

Station:(137664) SIBLEY 5 NNE
From Year=1893 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 0 2 47 227 547 811 981 917 627 319 50 2 4530
40 S 0 3 50 276 824 1635 2616 3533 4160 4479 4529 4530 4530
45 M 0 0 21 136 400 661 826 762 481 205 20 0 3513
45 S 0 0 22 158 558 1219 2045 2807 3288 3492 3512 3513 3513
50 M 0 0 8 72 268 512 671 608 342 116 6 0 2601
50 S 0 0 8 80 348 860 1531 2138 2480 2596 2601 2601 2601
55 M 0 0 3 33 159 366 516 453 219 55 1 0 1805
55 S 0 0 3 36 195 561 1077 1531 1750 1804 1805 1805 1805
60 M 0 0 0 12 81 232 363 304 123 22 0 0 1137
60 S 0 0 0 12 93 325 688 992 1115 1137 1137 1137 1137
Corn Growing Degree Days
50 M 1 3 38 157 339 515 647 599 396 212 40 2 2949
50 S 1 4 42 200 538 1053 1700 2299 2695 2907 2947 2949 2949
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