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Period of Record General Climate Summary - Growing Degree Days

Station:(213296) GRAND PORTAGE RNG STN
From Year=1895 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 7 44 250 486 697 686 433 145 12 0 2760
40 S 0 0 7 51 301 787 1484 2170 2603 2748 2760 2760 2760
45 M 0 0 1 13 134 338 542 531 291 67 2 0 1919
45 S 0 0 1 14 148 486 1028 1559 1850 1917 1919 1919 1919
50 M 0 0 0 3 56 201 388 376 169 24 0 0 1216
50 S 0 0 0 3 59 259 647 1023 1192 1216 1216 1216 1216
55 M 0 0 0 0 18 92 239 228 78 6 0 0 661
55 S 0 0 0 0 18 110 349 577 655 661 661 661 661
60 M 0 0 0 0 4 29 113 104 25 1 0 0 276
60 S 0 0 0 0 4 33 146 250 275 276 276 276 276
Corn Growing Degree Days
50 M 0 0 5 31 139 266 408 397 230 67 5 0 1548
50 S 0 0 5 36 175 441 849 1246 1476 1544 1548 1548 1548
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