CRATER LAKE NPS HQ, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(351946) CRATER LAKE NATL PARK H
From Year=1919 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	1216	1080	1140	973	795	562	310	313	462	744	997	1184	9775
60	1061	939	985	823	640	414	177	178	318	589	847	1029	7999
57	968	854	892	733	547	329	115	114	240	497	757	936	6982
55	906	797	830	673	486	275	82	82	194	437	697	874	6334
50	751	656	675	523	337	159	30	30	105	297	547	719	4831

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