BIRMINGHAM FAA ARPT, ALABAMA

Period of Record General Climate Summary - Heating Degree Days

From Year=1930 To Year=2012
Station:(010831) BIRMINGHAM FAA ARPT
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
65 655 505 347 132 26 1 0 0 9 120 369 592 2755
60 508 374 227 64 6 0 0 0 2 55 245 446 1926
57 424 302 167 38 2 0 0 0 1 30 182 364 1509
55 371 258 133 25 1 0 0 0 0 19 145 313 1263
50 250 160 68 7 0 0 0 0 0 4 74 197 759
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