SULA 3 ENE, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(247964) SULA 3 ENE
From Year=1955 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	1344	1074	970	715	507	288	134	160	396	705	1026	1315	8633
60	1189	932	815	565	354	157	45	60	253	550	876	1160	6956
57	1096	848	722	475	266	96	19	28	177	457	786	1067	6037
55	1034	791	660	415	213	65	10	15	134	396	726	1005	5464
50	879	650	505	273	104	18	1	3	56	250	576	850	4164

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