SHELTON, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457584) SHELTON
From Year=1948 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	812	654	633	474	299	154	65	60	162	418	626	785	5143
60	657	513	478	325	164	52	9	7	58	266	476	630	3635
57	564	429	385	240	97	18	1	1	23	182	386	537	2862
55	502	372	323	186	61	7	0	0	11	133	326	475	2397
50	348	234	176	73	11	0	0	0	1	44	187	321	1396

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