GRAYLAND, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453320) GRAYLAND
From Year=1948 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	705	595	609	508	402	275	215	195	233	403	559	707	5406
60	550	454	454	359	251	133	75	60	103	251	409	552	3651
57	457	369	361	271	165	61	23	17	46	166	319	459	2715
55	395	313	300	214	112	28	8	5	23	117	260	397	2172
50	242	179	155	86	22	1	0	0	2	31	126	244	1089

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