ALYESKA, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(500243) ALYESKA
From Year=1963 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1382	1176	1159	878	625	367	253	312	542	918	1158	1300	10069
60	1227	1035	1004	728	470	222	116	167	392	763	1008	1145	8275
57	1134	950	911	638	377	144	54	93	303	670	918	1052	7243
55	1072	893	849	578	316	99	28	55	245	608	858	990	6591
50	917	752	694	428	174	25	2	8	117	454	708	835	5114

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