OMAK, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(456121) OMAK
From Year=1980 To Year=2012
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	41	173	395	560	581	257	38	1	0	2048
57	0	0	0	23	130	337	498	519	209	23	1	0	1740
60	0	0	0	9	80	254	406	426	146	9	0	0	1329
65	0	0	0	2	31	137	261	275	62	1	0	0	768
70	0	0	0	0	10	53	137	141	17	0	0	0	360

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