OMAK, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456121) OMAK
From Year=1980 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1128	894	656	384	191	43	10	4	118	455	779	1171	5833
60	973	753	501	241	85	11	1	0	52	309	629	1016	4569
57	880	668	409	165	42	4	0	0	25	230	539	923	3883
55	818	612	347	123	23	2	0	0	13	183	480	861	3461
50	663	471	200	50	3	0	0	0	1	81	334	706	2508

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 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