HOONAH, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(503695) HOONAH
From Year=1972 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	1108	941	970	751	536	333	250	248	423	693	934	1040	8225
60	953	799	815	601	381	190	108	107	273	538	784	885	6432
57	860	714	722	511	290	113	45	42	185	445	694	792	5412
55	798	658	660	451	232	70	19	16	130	383	634	730	4779
50	643	516	505	301	104	9	1	0	33	230	484	575	3400

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