PORTLAND 2, TENNESSEE

Period of Record General Climate Summary - Heating Degree Days

From Year=1955 To Year=2012
Station:(407359) PORTLAND 2
Averages Daily Extremes
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 940 745 538 243 78 6 0 1 34 228 506 820 4139
60 786 605 398 148 31 1 0 0 10 130 368 667 3143
57 695 524 321 103 15 0 0 0 4 85 294 577 2619
55 635 471 274 78 9 0 0 0 2 62 249 518 2297
50 491 346 171 33 1 0 0 0 0 22 152 379 1597
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
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