RICHLAND, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457015) RICHLAND
From Year=1944 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	975	723	573	345	147	34	3	4	68	346	684	934	4836
60	820	582	419	207	59	6	0	0	20	208	534	779	3633
57	727	497	327	135	27	2	0	0	8	138	445	686	2992
55	665	441	268	94	14	0	0	0	4	99	387	624	2598
50	513	305	137	26	1	0	0	0	0	34	251	472	1739

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