COLVILLE AP, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(451650) COLVILLE AIRPORT
From Year=1937 To Year=1987
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	0	8	82	211	407	370	144	8	0	0	1232
57	0	0	0	4	56	163	347	310	107	4	0	0	991
60	0	0	0	2	28	103	260	224	62	1	0	0	679
65	0	0	0	0	6	38	135	107	18	0	0	0	304
70	0	0	0	0	1	9	50	34	3	0	0	0	97

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