SEATTLE UNIV OF WASHING, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457478) SEATTLE UNIV OF WASHING
From Year=1948 To Year=1983
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	793	602	595	436	261	128	44	44	128	352	562	710	4655
60	638	461	440	288	131	37	5	4	39	203	412	555	3214
57	545	377	348	205	71	11	1	0	12	126	323	462	2480
55	483	321	286	153	42	4	0	0	5	83	264	400	2040
50	330	185	144	51	5	0	0	0	0	18	132	248	1114

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