GRAND MARAIS, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(213282) GRAND MARAIS
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 4 52 215 405 634 682 440 171 18 0 2622
40 S 0 1 5 57 271 676 1310 1992 2432 2603 2621 2622 2622
45 M 0 0 1 17 101 257 479 527 296 77 3 0 1757
45 S 0 0 1 18 118 375 854 1381 1677 1754 1757 1757 1757
50 M 0 0 0 5 36 127 326 373 168 24 0 0 1058
50 S 0 0 0 5 41 168 494 866 1034 1058 1058 1058 1058
55 M 0 0 0 2 9 45 185 224 75 4 0 0 545
55 S 0 0 0 2 11 56 241 465 540 545 545 545 545
60 M 0 0 0 1 1 11 81 101 24 1 0 0 219
60 S 0 0 0 1 2 13 94 194 219 219 219 219 219
Corn Growing Degree Days
50 M 0 0 3 29 107 205 354 387 216 69 5 0 1375
50 S 0 0 3 32 138 343 698 1085 1301 1370 1375 1375 1375
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