HUMPTULIPS SALMON HATCH, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453826) HUMPTULIPS SALMON HATCH
From Year=1987 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	748	667	653	516	395	261	157	141	226	452	632	780	5629
60	593	526	498	367	248	127	42	35	99	298	482	625	3940
57	500	441	406	280	167	63	10	7	47	211	392	532	3054
55	438	385	344	224	120	31	3	1	25	158	332	470	2530
50	284	246	195	100	35	2	0	0	3	56	190	315	1426

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