LONGMIRE RAINIER NPS, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454764) LONGMIRE RAINIER NPS
From Year=1909 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	1063	896	887	713	521	326	168	165	298	573	842	1025	7478
60	908	755	733	564	372	197	72	68	175	421	692	870	5827
57	815	670	640	475	288	133	36	33	116	333	602	777	4918
55	753	614	578	416	236	96	21	18	84	277	542	715	4350
50	598	472	424	275	125	32	3	2	28	154	393	560	3066

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