GRAND MARAIS, MINNESOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(213282) GRAND MARAIS
From Year=1900 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	1584	1359	1199	818	572	347	165	122	316	640	1003	1417	9542
60	1429	1218	1044	669	418	206	67	38	185	485	853	1262	7875
57	1336	1133	951	579	328	133	32	14	120	394	763	1169	6953
55	1274	1077	889	520	271	91	17	7	85	334	703	1107	6374
50	1119	935	734	373	142	23	2	0	28	198	553	952	5061

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