JOHN DAY DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454035) JOHN DAY DAM
From Year=1958 To Year=1972
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	890	649	573	366	183	42	6	5	48	286	594	854	4496
60	735	508	418	224	84	7	1	0	11	158	444	699	3289
57	642	423	327	148	41	2	0	0	3	95	355	606	2642
55	580	366	268	104	22	1	0	0	1	62	296	544	2244
50	427	227	136	26	2	0	0	0	0	14	159	391	1383

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