KNOXVILLE UNIV OF TENN, TENNESSEE

Period of Record General Climate Summary - Growing Degree Days

From Year=1943 To Year=1982
Station:(404955) KNOXVILLE UNIV OF TENN
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 114 142 330 600 861 1048 1182 1164 960 642 309 127 7480
40 S 114 256 587 1187 2048 3096 4278 5442 6402 7044 7353 7480 7480
45 M 57 74 214 453 706 898 1027 1009 810 489 193 63 5993
45 S 57 131 345 799 1505 2403 3430 4439 5248 5738 5931 5993 5993
50 M 26 33 122 317 552 748 872 854 660 342 105 27 4657
50 S 26 59 181 498 1050 1798 2670 3524 4184 4525 4630 4657 4657
55 M 9 10 60 198 401 598 717 699 510 212 48 10 3473
55 S 9 20 80 278 679 1278 1995 2693 3203 3415 3463 3473 3473
60 M 2 2 22 105 261 449 562 544 362 108 16 2 2435
60 S 2 4 26 132 393 842 1404 1947 2309 2417 2433 2435 2435
Corn Growing Degree Days
50 M 58 77 187 362 557 718 820 808 641 386 172 65 4852
50 S 58 135 322 684 1242 1960 2779 3587 4228 4615 4787 4852 4852
Derived form the 1943-1982 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