GRAND FORKS INTL AP, NORTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(323616) GRAND FORKS FAA AP
From Year=1948 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 12 142 463 727 902 847 510 193 16 0 3811
40 S 0 0 12 154 617 1344 2245 3092 3602 3795 3811 3811 3811
45 M 0 0 3 74 324 577 747 692 367 105 4 0 2893
45 S 0 0 3 77 401 979 1725 2417 2784 2888 2893 2893 2893
50 M 0 0 1 34 205 429 592 537 239 50 1 0 2086
50 S 0 0 1 35 239 668 1260 1797 2036 2085 2086 2086 2086
55 M 0 0 0 14 114 287 437 384 136 20 0 0 1392
55 S 0 0 0 14 128 414 851 1235 1372 1391 1392 1392 1392
60 M 0 0 0 5 53 165 287 241 67 7 0 0 824
60 S 0 0 0 5 58 223 509 751 817 824 824 824 824
Corn Growing Degree Days
50 M 0 0 9 98 289 449 583 538 307 124 12 0 2409
50 S 0 0 9 107 396 845 1428 1966 2273 2397 2409 2409 2409
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