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Period of Record General Climate Summary - Growing Degree Days

Station:(478349) SUPERIOR
From Year=1909 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 10 75 283 555 812 782 501 217 25 1 3262
40 S 0 1 10 85 368 923 1736 2518 3019 3237 3261 3262 3262
45 M 0 0 3 33 165 406 657 627 356 114 6 0 2368
45 S 0 0 3 36 200 607 1264 1891 2247 2362 2368 2368 2368
50 M 0 0 1 12 84 269 503 472 223 49 1 0 1615
50 S 0 0 1 13 98 367 869 1341 1565 1614 1615 1615 1615
55 M 0 0 0 3 37 157 351 321 119 17 0 0 1006
55 S 0 0 0 4 41 198 549 870 989 1006 1006 1006 1006
60 M 0 0 0 1 14 77 214 185 51 4 0 0 546
60 S 0 0 0 1 14 91 305 490 541 546 546 546 546
Corn Growing Degree Days
50 M 0 1 7 52 157 311 504 480 272 107 11 0 1901
50 S 0 1 8 59 216 527 1031 1511 1783 1890 1901 1901 1901
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