WILLMAR RTC, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(219004) WILLMAR CNTY HWY GAR
From Year=1893 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 1 26 199 541 806 988 910 608 283 33 1 4396
40 S 0 1 27 226 767 1573 2561 3470 4079 4362 4395 4396 4396
45 M 0 0 10 114 395 656 833 755 462 174 12 0 3410
45 S 0 0 10 125 519 1175 2008 2763 3225 3398 3410 3410 3410
50 M 0 0 3 57 262 507 678 600 324 93 3 0 2527
50 S 0 0 3 61 323 830 1507 2107 2431 2524 2527 2527 2527
55 M 0 0 1 25 155 361 523 446 204 42 0 0 1756
55 S 0 0 1 26 180 541 1064 1510 1713 1755 1756 1756 1756
60 M 0 0 0 9 78 227 369 296 111 15 0 0 1106
60 S 0 0 0 9 87 314 683 979 1091 1106 1106 1106 1106
Corn Growing Degree Days
50 M 0 1 18 123 320 510 656 592 368 168 21 1 2780
50 S 0 1 19 143 463 973 1628 2221 2589 2758 2779 2780 2780
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