TUTKA BAY LAGOON, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(509460) TUTKA BAY LAGOON
From Year=1979 To Year=2003
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1238	1085	1078	870	655	408	288	324	532	883	1079	1193	9633
60	1083	943	923	720	500	259	138	174	382	728	929	1038	7818
57	990	859	830	630	407	174	61	96	293	635	839	945	6759
55	928	802	768	570	345	122	27	55	234	573	779	883	6086
50	773	661	613	420	195	29	1	5	101	419	629	728	4573

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