GARDINER, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(243378) GARDINER
From Year=1956 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	1280	1051	927	652	395	161	25	40	225	557	961	1244	7519
60	1125	910	772	503	256	76	6	13	124	406	811	1089	6092
57	1032	825	679	416	184	42	2	6	82	322	721	996	5308
55	970	769	617	359	142	27	1	4	61	269	662	934	4815
50	815	628	463	230	65	6	0	1	27	160	513	779	3687

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