DEER LODGE 3 W, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(242275) DEER LODGE 3 W
From Year=1959 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	1376	1097	1023	746	532	288	133	160	406	709	1056	1344	8869
60	1221	956	868	596	379	164	50	68	267	554	906	1189	7217
57	1128	871	775	506	293	105	24	35	194	462	816	1096	6305
55	1066	815	713	448	239	75	13	21	152	402	756	1034	5732
50	911	674	559	308	124	24	2	5	74	262	606	879	4427

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