RIMROCK TIETON DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457038) RIMROCK TIETON DAM
From Year=1917 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	1198	972	910	664	471	270	115	133	296	596	891	1111	7628
60	1043	831	755	514	323	152	43	53	171	442	741	956	6024
57	950	746	662	426	242	95	20	25	112	352	651	863	5143
55	888	690	600	367	193	64	11	13	81	294	591	801	4594
50	733	548	445	230	92	17	2	1	29	166	441	646	3349

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