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Period of Record General Climate Summary - Growing Degree Days

Station:(218243) THIEF RIVER FALLS
From Year=1900 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 0 8 121 411 687 853 805 477 194 12 0 3568
40 S 0 0 8 129 541 1227 2080 2885 3362 3556 3568 3568 3568
45 M 0 0 3 62 277 537 698 650 339 108 2 0 2676
45 S 0 0 3 65 342 879 1576 2227 2566 2673 2676 2676 2676
50 M 0 0 1 27 168 391 543 496 218 50 0 0 1893
50 S 0 0 1 28 196 587 1129 1625 1842 1892 1893 1893 1893
55 M 0 0 0 10 88 253 389 344 123 18 0 0 1227
55 S 0 0 0 11 99 352 741 1085 1208 1227 1227 1227 1227
60 M 0 0 0 3 39 140 243 206 59 5 0 0 695
60 S 0 0 0 3 42 182 425 631 689 695 695 695 695
Corn Growing Degree Days
50 M 0 0 6 86 265 424 545 511 292 124 7 0 2260
50 S 0 0 7 92 357 781 1326 1837 2128 2253 2260 2260 2260
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