SMITHVILLE, TENNESSEE

Period of Record General Climate Summary - Growing Degree Days

From Year=1971 To Year=2012
Station:(408405) SMITHVILLE
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 79 104 283 487 763 976 1122 1091 852 527 259 110 6653
40 S 79 183 466 953 1716 2691 3813 4905 5757 6284 6543 6653 6653
45 M 38 51 177 350 608 826 967 936 702 379 157 56 5246
45 S 38 89 266 615 1223 2049 3016 3952 4654 5034 5191 5246 5246
50 M 15 20 96 228 455 676 812 781 552 247 82 23 3986
50 S 15 35 131 359 814 1489 2301 3083 3635 3882 3964 3986 3986
55 M 4 6 43 130 311 526 657 626 406 139 34 7 2889
55 S 4 10 53 183 494 1019 1676 2303 2709 2848 2882 2889 2889
60 M 1 1 14 58 183 377 502 472 268 62 10 1 1949
60 S 1 2 16 74 257 634 1136 1608 1876 1938 1948 1949 1949
Corn Growing Degree Days
50 M 53 76 189 316 491 658 770 741 558 349 178 74 4452
50 S 53 130 318 634 1125 1783 2552 3293 3852 4201 4378 4452 4452
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