KELSO SOUTHWEST RGNL AP, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454135) KELSO WB AIRPORT
From Year=1949 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	929	686	674	476	336	191	87	81	161	431	612	746	5408
60	774	545	519	326	191	76	14	13	63	282	462	591	3855
57	681	460	426	237	116	28	2	3	34	201	373	498	3059
55	619	404	364	182	75	12	0	1	22	152	314	436	2581
50	466	265	213	68	14	1	0	0	11	57	176	285	1556

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