POINT GRENVILLE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456584) POINT GRENVILLE
From Year=1947 To Year=1979
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	737	617	675	559	447	329	269	253	276	416	567	689	5833
60	582	476	520	409	294	183	120	104	134	262	418	534	4034
57	489	391	427	320	204	101	48	36	65	175	328	441	3025
55	427	335	365	261	147	56	19	13	32	122	269	379	2423
50	273	197	212	121	36	3	1	0	2	29	134	227	1236

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