HARLAN, KENTUCKY

Period of Record General Climate Summary - Growing Degree Days

From Year=1948 To Year=2012
Station:(150450) HARLAN
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 60 82 223 447 725 927 1074 1054 834 504 219 87 6238
40 S 60 143 365 813 1538 2465 3539 4593 5427 5931 6150 6238 6238
45 M 25 37 129 312 571 777 919 899 684 358 125 41 4876
45 S 25 62 192 504 1075 1851 2770 3670 4353 4711 4836 4876 4876
50 M 8 13 64 196 419 627 764 744 534 228 60 16 3673
50 S 8 21 85 282 701 1328 2092 2836 3370 3598 3657 3673 3673
55 M 2 3 26 107 278 477 609 589 387 124 21 4 2628
55 S 2 5 31 138 416 893 1502 2092 2478 2602 2624 2628 2628
60 M 0 0 8 46 155 330 454 435 248 53 5 1 1735
60 S 0 0 8 55 210 540 994 1428 1676 1729 1734 1735 1735
Corn Growing Degree Days
50 M 38 59 156 294 462 618 737 721 540 319 150 54 4147
50 S 38 97 253 547 1008 1626 2363 3084 3624 3943 4093 4147 4147
Derived form the 1948-2012 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