AITKIN, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(210059) AITKIN 2 E
From Year=1940 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 13 131 430 701 858 788 488 217 25 0 3652
40 S 0 1 13 145 574 1276 2134 2922 3411 3627 3652 3652 3652
45 M 0 0 4 65 289 551 703 633 346 121 9 0 2722
45 S 0 0 4 69 358 909 1613 2246 2592 2713 2722 2722 2722
50 M 0 0 1 27 173 403 548 479 220 59 2 0 1912
50 S 0 0 1 28 201 604 1152 1631 1851 1910 1912 1912 1912
55 M 0 0 0 10 88 262 394 327 121 24 0 0 1226
55 S 0 0 0 10 98 360 754 1081 1202 1226 1226 1226 1226
60 M 0 0 0 3 36 142 246 188 54 8 0 0 678
60 S 0 0 0 3 39 181 428 616 670 678 678 678 678
Corn Growing Degree Days
50 M 0 1 11 97 272 437 549 496 289 133 16 1 2301
50 S 0 1 11 109 380 818 1367 1863 2152 2285 2301 2301 2301
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