GRAYS RIVER HATCHERY, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453333) GRAYS RIVER HATCHERY
From Year=1962 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	768	639	630	519	384	243	139	127	204	423	612	760	5448
60	613	498	475	370	239	116	41	34	88	271	462	605	3811
57	520	413	383	283	161	58	12	9	41	186	372	512	2950
55	458	357	321	228	115	31	4	3	21	135	312	450	2435
50	304	220	176	105	32	3	0	0	2	43	172	296	1355

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 Jul 28, 2006
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