JOHN DAY DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(454035) JOHN DAY DAM
From Year=1958 To Year=1972
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	5	40	184	400	633	619	358	92	2	0	2334
57	0	0	2	24	141	341	571	557	300	63	1	0	2001
60	0	0	0	11	91	256	479	464	218	33	0	0	1551
65	0	0	0	2	35	141	329	314	106	6	0	0	932
70	0	0	0	0	9	65	197	185	40	1	0	0	496

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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