CHELAN, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454430) LAKESIDE
From Year=1891 To Year=1958
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1246	977	752	424	199	61	7	11	118	434	818	1091	6138
60	1091	836	597	279	90	15	1	2	44	284	668	936	4842
57	998	751	504	198	47	5	0	0	20	202	578	843	4147
55	936	695	443	150	27	2	0	0	11	154	518	781	3715
50	781	554	292	57	4	0	0	0	2	64	369	626	2748

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