CHIGNIK, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(501716) CHIGNIK
From Year=1967 To Year=1978
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1227	1077	1116	937	754	508	354	351	507	785	958	1124	9698
60	1072	936	961	787	599	358	203	198	357	630	808	969	7878
57	979	852	868	697	506	269	120	114	267	537	718	876	6803
55	917	795	806	637	444	214	73	66	207	475	658	814	6106
50	762	654	651	487	291	95	8	7	76	320	508	659	4519

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