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Period of Record General Climate Summary - Heating Degree Days

Station:(474953) MADELINE ISLAND
From Year=1944 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	1574	1365	1195	784	499	210	60	64	246	566	946	1350	8859
60	1419	1224	1040	635	352	107	14	16	135	415	796	1195	7348
57	1326	1139	948	546	269	63	5	5	84	329	706	1102	6522
55	1264	1083	886	487	219	42	2	2	58	274	646	1040	6002
50	1109	942	731	346	113	10	0	0	17	156	498	885	4808

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