GREENWATER, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453357) GREENWATER
From Year=1939 To Year=1981
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1041	823	822	638	451	300	176	191	309	571	812	975	7110
60	886	682	667	489	303	167	66	73	171	417	662	820	5402
57	793	597	574	399	220	100	26	29	104	325	572	727	4466
55	731	540	512	340	169	64	11	14	69	266	512	665	3893
50	576	399	358	200	69	12	0	1	16	134	362	510	2638

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