RIMROCK TIETON DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457038) RIMROCK TIETON DAM
From Year=1947 To Year=1977
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1218	954	938	692	479	268	126	143	294	616	892	1112	7732
60	1063	813	783	542	332	151	52	59	170	462	742	957	6126
57	970	728	690	453	252	95	26	29	112	371	652	864	5241
55	908	672	628	394	203	65	15	15	82	313	592	802	4689
50	753	530	473	253	102	18	2	1	29	183	442	647	3433

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