TACOMA WB CITY, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458286) TACOMA WB CITY
From Year=1948 To Year=1981
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	786	607	612	455	290	152	61	54	146	370	575	712	4819
60	631	466	457	308	154	50	7	4	46	220	425	557	3326
57	538	382	364	223	88	17	1	0	16	140	335	465	2569
55	476	326	302	170	54	6	0	0	8	96	277	403	2117
50	323	191	159	61	8	0	0	0	1	25	144	252	1164

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