ELMA, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(452531) ELMA
From Year=1948 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	780	636	614	467	313	174	87	73	159	392	611	759	5067
60	625	495	459	320	178	67	18	13	56	243	461	604	3539
57	532	410	367	236	109	26	4	3	23	162	371	511	2754
55	470	354	305	184	73	11	1	1	11	116	312	449	2286
50	317	216	163	74	16	1	0	0	1	35	175	296	1295

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