WHITMAN MISSION, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(459200) WHITMAN MISSION
From Year=1962 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	964	754	621	436	240	82	17	23	142	451	720	959	5409
60	809	612	467	292	124	23	2	4	58	303	570	804	4067
57	716	528	375	211	71	7	0	1	29	222	482	712	3355
55	655	472	315	163	45	3	0	0	17	174	424	650	2917
50	503	335	178	66	9	0	0	0	4	77	285	498	1954

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