TACOMA CITY HALL, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(458286) TACOMA WB CITY
From Year=1933 To Year=1981
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	1	16	79	177	299	303	171	38	2	0	1088
57	0	0	0	9	51	127	237	242	121	20	1	0	808
60	0	0	0	3	24	68	150	153	63	6	0	0	468
65	0	0	0	0	6	19	49	47	14	1	0	0	136
70	0	0	0	0	1	4	11	10	1	0	0	0	27

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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