CROW AGENCY, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(242112) CROW AGENCY
From Year=1898 To Year=1991
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1404	1141	949	567	297	92	11	27	207	518	929	1273	7415
60	1249	1000	794	420	174	33	2	6	108	366	779	1118	6049
57	1156	915	702	336	116	14	0	2	67	281	690	1025	5304
55	1094	859	640	283	85	8	0	1	47	230	630	963	4839
50	939	718	489	170	33	1	0	0	18	126	481	808	3785

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