SHELTON, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457584) SHELTON
From Year=1931 To Year=1999
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	810	661	630	465	294	157	67	61	163	412	627	778	5127
60	655	519	475	317	160	53	10	7	58	260	477	623	3616
57	562	435	382	232	93	19	2	1	23	177	388	530	2842
55	500	378	320	178	58	7	0	0	11	128	328	468	2378
50	346	240	174	68	10	0	0	0	1	42	188	315	1385

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