JAMESTOWN, KENTUCKY

Period of Record General Climate Summary - Growing Degree Days

From Year=1971 To Year=2012
Station:(154208) JAMESTOWN
Averages Daily Extremes
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 75 96 263 485 740 970 1118 1083 846 514 257 107 6553
40 S 75 171 433 918 1658 2628 3746 4828 5674 6189 6445 6553 6553
45 M 38 49 164 349 586 820 963 928 696 369 158 56 5175
45 S 38 87 250 599 1185 2005 2967 3895 4591 4961 5119 5175 5175
50 M 17 21 91 231 435 670 808 773 546 239 87 25 3943
50 S 17 38 129 360 795 1465 2273 3046 3592 3831 3919 3943 3943
55 M 6 7 44 137 294 520 653 618 400 134 41 9 2863
55 S 6 13 57 195 489 1009 1661 2279 2679 2813 2854 2863 2863
60 M 2 2 17 68 171 371 498 463 263 60 14 3 1931
60 S 2 3 21 88 260 631 1129 1592 1855 1914 1929 1931 1931
Corn Growing Degree Days
50 M 43 61 165 300 467 653 769 740 550 321 156 59 4283
50 S 43 104 269 570 1036 1689 2458 3197 3747 4068 4224 4283 4283
Derived form the 1971-2012 Data
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 May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster