PUYALLUP 2 W EXP STN, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456803) PUYALLUP 2 W EXP STN
From Year=1914 To Year=1995
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	808	654	620	462	303	159	70	72	185	411	630	775	5151
60	653	513	465	314	163	53	10	10	71	260	480	620	3613
57	560	429	372	227	93	18	1	1	30	176	391	528	2827
55	499	372	311	173	57	6	0	0	15	128	331	466	2360
50	346	235	167	64	9	0	0	0	1	43	192	314	1370

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