ROSALIA, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457180) ROSALIA
From Year=1893 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	1139	918	804	563	365	192	59	64	230	532	844	1083	6794
60	984	777	649	416	230	93	17	20	124	381	694	928	5314
57	891	692	556	331	160	51	6	8	77	296	604	835	4509
55	829	636	495	277	120	32	3	4	53	242	545	773	4007
50	674	495	343	155	46	6	0	0	16	129	396	619	2879

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