GEM LAKE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043369) GEM LAKE
From Year=1924 To Year=2009
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1210	1084	1043	835	625	384	167	184	379	654	886	1123	8575
60	1055	943	888	685	471	248	65	72	235	499	736	968	6865
57	962	858	795	595	380	178	29	35	162	406	646	875	5921
55	900	801	733	536	321	137	16	20	122	345	586	813	5330
50	745	660	578	387	187	62	3	3	52	208	436	658	3981

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