TACOMA 1, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458278) TACOMA 1
From Year=1982 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	691	601	538	396	249	110	33	28	125	352	562	738	4422
60	536	460	383	250	120	26	2	1	35	204	412	583	3010
57	443	375	291	169	63	6	0	0	11	127	322	490	2298
55	381	319	231	120	36	2	0	0	4	87	264	428	1874
50	232	183	101	34	4	0	0	0	0	23	135	277	989

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