SALEM MCNARY FLD, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(357500) SALEM WSO AIRPORT
From Year=1892 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	785	629	585	439	287	135	37	34	124	363	592	752	4760
60	630	488	430	292	154	43	4	3	40	216	442	597	3339
57	537	403	338	209	89	15	1	0	15	138	353	504	2602
55	475	347	277	158	56	6	0	0	7	96	295	442	2160
50	325	212	140	57	9	0	0	0	1	28	163	293	1228

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