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Period of Record General Climate Summary - Heating Degree Days

Station:(313565) GRANDFATHER MOUNTAIN
From Year=1955 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1149	986	860	578	352	160	81	96	240	531	771	1025	6829
60	994	844	705	430	211	61	17	22	119	378	621	870	5273
57	901	760	612	348	144	29	5	7	70	291	532	777	4477
55	839	703	552	298	108	17	2	3	47	238	473	715	3995
50	685	562	407	189	48	4	0	0	14	132	333	562	2936

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 Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu