COLFAX 1 NW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451586) COLFAX 1 NW
From Year=1893 To Year=1994
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1101	837	762	534	338	158	54	61	215	510	803	1028	6400
60	946	696	607	387	206	69	14	16	109	359	653	873	4934
57	853	612	514	302	139	34	4	5	65	273	563	780	4145
55	791	556	452	248	101	18	2	2	44	220	503	718	3655
50	636	415	302	130	35	2	0	0	12	109	357	563	2562

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