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Period of Record General Climate Summary - Growing Degree Days

Station:(131402) CHARLES CITY
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 1 4 54 271 613 867 1018 951 668 351 66 4 4868
40 S 1 4 58 330 943 1810 2828 3779 4447 4798 4864 4868 4868
45 M 0 1 26 168 461 717 863 796 519 227 30 1 3809
45 S 0 1 27 194 655 1372 2235 3032 3551 3778 3807 3809 3809
50 M 0 0 11 92 318 567 708 641 376 131 11 0 2856
50 S 0 0 12 104 422 989 1697 2339 2715 2845 2856 2856 2856
55 M 0 0 5 45 195 419 553 487 245 64 3 0 2015
55 S 0 0 5 50 244 663 1216 1703 1948 2013 2015 2015 2015
60 M 0 0 2 20 102 276 399 335 139 26 0 0 1298
60 S 0 0 2 21 123 399 798 1133 1271 1298 1298 1298 1298
Corn Growing Degree Days
50 M 1 2 35 168 371 564 684 630 418 213 39 2 3126
50 S 1 3 38 206 576 1140 1824 2454 2872 3085 3124 3126 3126
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