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Period of Record General Climate Summary - Heating Degree Days

Station:(214861) LONG PRAIRIE
From Year=1893 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	1749	1450	1186	659	314	86	21	47	233	576	1063	1542	8927
60	1594	1309	1031	514	195	32	3	12	133	429	913	1387	7552
57	1501	1224	938	431	137	15	1	4	87	346	824	1294	6802
55	1439	1168	877	378	104	9	0	2	63	295	764	1232	6329
50	1284	1027	724	254	46	2	0	0	24	182	616	1077	5234

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