PORTLAND 2, TENNESSEE

Period of Record General Climate Summary - Growing Degree Days

From Year=1955 To Year=2012
Station:(407359) PORTLAND 2
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 77 111 289 546 814 1025 1170 1133 903 581 284 112 7045
40 S 77 187 476 1022 1837 2862 4032 5165 6069 6650 6934 7045 7045
45 M 37 58 183 405 659 875 1015 978 753 431 179 56 5631
45 S 37 95 278 683 1343 2218 3233 4211 4965 5396 5575 5631 5631
50 M 16 25 105 277 506 725 860 823 603 293 99 24 4357
50 S 16 41 146 423 929 1654 2514 3337 3941 4234 4333 4357 4357
55 M 5 8 52 172 358 575 705 668 455 178 46 8 3231
55 S 5 13 66 238 596 1171 1876 2544 2999 3177 3223 3231 3231
60 M 1 1 21 92 226 426 550 513 313 90 15 2 2251
60 S 1 2 24 115 341 767 1317 1830 2144 2234 2249 2251 2251
Corn Growing Degree Days
50 M 42 65 172 335 522 701 810 778 597 359 163 59 4603
50 S 42 108 279 614 1136 1837 2646 3424 4021 4380 4543 4603 4603
Derived form the 1955-2012 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