SUNNYSIDE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458207) SUNNYSIDE
From Year=1948 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1028	762	604	379	178	52	10	13	101	395	726	988	5236
60	873	621	450	240	82	13	1	1	36	251	576	833	3976
57	780	536	358	166	43	3	0	0	16	174	487	740	3304
55	718	480	299	123	25	1	0	0	9	129	428	678	2890
50	564	341	164	43	4	0	0	0	1	47	285	524	1972

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 Jul 28, 2006
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