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Period of Record General Climate Summary - Growing Degree Days

Station:(391777) CLEAR LAKE
From Year=1903 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 37 192 516 782 966 906 594 277 41 1 4314
40 S 0 3 40 232 748 1529 2495 3401 3995 4271 4312 4314 4314
45 M 0 0 16 110 372 632 811 751 448 169 16 0 3324
45 S 0 0 16 126 498 1130 1941 2691 3139 3308 3324 3324 3324
50 M 0 0 6 56 243 482 656 596 312 91 4 0 2446
50 S 0 0 6 62 305 787 1443 2039 2351 2442 2446 2446 2446
55 M 0 0 2 25 140 338 501 442 194 41 1 0 1681
55 S 0 0 2 26 166 503 1004 1446 1640 1681 1681 1681 1681
60 M 0 0 1 9 66 205 348 294 105 15 0 0 1042
60 S 0 0 1 9 75 281 629 923 1027 1042 1042 1042 1042
Corn Growing Degree Days
50 M 1 2 27 127 310 490 637 588 361 169 28 1 2742
50 S 1 3 30 157 468 958 1595 2183 2544 2713 2740 2742 2742
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