ISABELLA 1 W, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(214068) ISABELLA 1 W
From Year=1957 To Year=2005
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 5 73 329 568 741 687 402 151 8 0 2964
40 S 0 0 5 78 407 975 1717 2403 2805 2957 2964 2964 2964
45 M 0 0 1 32 207 420 586 532 268 79 2 0 2128
45 S 0 0 1 33 240 660 1247 1778 2046 2125 2128 2128 2128
50 M 0 0 0 11 114 280 432 378 156 35 1 0 1408
50 S 0 0 0 11 125 406 837 1216 1372 1407 1408 1408 1408
55 M 0 0 0 3 53 161 283 235 77 14 0 0 826
55 S 0 0 0 3 56 217 500 735 812 826 826 826 826
60 M 0 0 0 0 20 77 153 118 31 3 0 0 402
60 S 0 0 0 0 20 97 250 368 399 402 402 402 402
Corn Growing Degree Days
50 M 0 1 5 60 218 347 459 420 232 89 4 0 1833
50 S 0 1 5 65 283 630 1089 1508 1740 1829 1833 1833 1833
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