CRESTON, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(242104) CRESTON
From Year=1949 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	1304	1060	966	659	423	222	83	103	341	681	978	1235	8056
60	1149	919	811	509	278	111	26	35	206	526	828	1080	6480
57	1056	834	718	420	201	63	10	15	139	433	738	987	5615
55	994	777	656	362	155	40	5	7	103	373	678	925	5074
50	839	636	501	225	67	8	0	1	40	230	528	770	3846

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