GRAFTON, NORTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(323594) GRAFTON STATE SCHOOL
From Year=1893 To Year=2011
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 1 11 154 481 737 913 853 528 216 15 0 3909
40 S 0 1 11 165 646 1384 2296 3150 3678 3894 3909 3909 3909
45 M 0 0 3 83 342 588 758 698 386 121 4 0 2984
45 S 0 0 3 86 428 1016 1774 2472 2858 2980 2984 2984 2984
50 M 0 0 1 40 222 440 603 543 257 58 1 0 2165
50 S 0 0 1 41 263 703 1306 1849 2106 2164 2165 2165 2165
55 M 0 0 0 17 128 299 448 391 151 22 0 0 1457
55 S 0 0 0 17 145 444 893 1283 1434 1457 1457 1457 1457
60 M 0 0 0 6 64 176 298 248 76 6 0 0 874
60 S 0 0 0 6 69 246 544 792 868 874 874 874 874
Corn Growing Degree Days
50 M 0 0 8 109 310 462 591 545 327 141 12 0 2507
50 S 0 0 9 118 428 890 1481 2026 2353 2494 2506 2507 2507
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