WALHALLA 1 SW, NORTH DAKOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(329155) WALHALLA
From Year=1904 To Year=1998
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1974	1670	1387	744	389	132	31	80	244	656	1138	1697	10142
60	1819	1529	1232	597	258	58	7	22	135	508	988	1542	8695
57	1726	1444	1139	513	190	30	3	8	87	423	898	1449	7910
55	1664	1388	1077	458	149	17	1	3	63	371	838	1387	7416
50	1509	1247	923	331	70	3	0	0	24	255	690	1232	6283

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