RAINIER LONGMIRE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456894) RAINIER LONGMIRE
From Year=1931 To Year=1978
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1073	888	896	706	503	319	162	169	286	550	826	991	7370
60	918	746	741	556	355	190	67	71	164	398	676	836	5720
57	825	662	648	467	271	126	33	34	107	312	586	743	4815
55	763	605	586	408	219	90	18	19	76	257	526	681	4252
50	608	464	432	267	112	29	3	2	24	140	378	526	2986

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