COLLEGEVILLE ST JOHN, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(211691) COLLEGEVILLE ST JOHN
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 2 27 197 535 795 982 902 606 283 37 1 4368
40 S 0 2 29 226 761 1556 2539 3440 4047 4330 4367 4368 4368
45 M 0 0 11 113 388 645 827 747 459 172 13 0 3377
45 S 0 0 11 124 513 1158 1985 2732 3192 3364 3377 3377 3377
50 M 0 0 4 57 256 496 672 592 321 91 4 0 2493
50 S 0 0 4 61 318 814 1486 2078 2399 2489 2493 2493 2493
55 M 0 0 1 25 149 351 518 437 200 40 1 0 1721
55 S 0 0 1 26 175 526 1043 1481 1680 1720 1721 1721 1721
60 M 0 0 0 8 73 217 364 288 108 14 0 0 1073
60 S 0 0 0 9 82 300 663 952 1060 1073 1073 1073 1073
Corn Growing Degree Days
50 M 0 1 17 119 314 500 654 586 357 153 19 1 2721
50 S 0 1 18 137 451 951 1605 2191 2548 2701 2721 2721 2721
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