SHEMYA AFB, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(508419) SHEMYA USAF BASE
From Year=1949 To Year=1995
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1051	965	1022	900	821	679	569	484	514	703	867	1009	9583
60	896	824	867	750	666	529	414	329	364	548	717	854	7757
57	803	739	774	660	573	439	321	236	274	455	627	761	6661
55	741	682	712	600	511	379	259	174	214	393	567	699	5931
50	586	541	557	450	356	229	107	36	70	238	417	544	4132

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