KALISPELL WSO AIRPORT, MONTANA

Period of Record General Climate Summary - Heating Degree Days

Station:(244558) KALISPELL WSO AIRPORT
From Year=1899 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	1351	1110	970	644	413	218	74	100	335	673	993	1259	8140
60	1196	969	815	494	269	108	21	36	203	518	843	1104	6576
57	1103	885	722	406	192	59	7	16	137	426	753	1011	5717
55	1041	828	660	348	146	37	3	8	101	365	693	949	5180
50	886	687	505	213	60	8	0	1	40	225	543	794	3961

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