ISLAND LAKE RSVR, MINNESOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(214096) ISLAND LAKE RES CANYON
From Year=1948 To Year=1995
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1999	1645	1512	891	433	161	103	103	425	675	1185	1626	10758
60	1844	1504	1357	741	306	73	37	40	278	522	1035	1471	9206
57	1751	1419	1264	651	236	39	17	19	194	433	945	1378	8345
55	1689	1363	1202	591	194	23	8	10	147	377	885	1316	7803
50	1534	1221	1047	443	105	4	0	1	63	252	735	1161	6565

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