ADAK, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(500026) ADAK
From Year=1949 To Year=1996
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	991	911	950	837	750	601	485	427	511	696	834	962	8955
60	836	770	795	687	595	451	331	273	362	541	684	807	7130
57	743	685	702	597	502	361	239	184	272	448	594	714	6041
55	681	629	640	537	440	301	180	128	213	386	534	652	5320
50	526	488	485	387	285	153	50	20	75	231	384	497	3581

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 Jul 28, 2006
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