MERRILL, WISCONSIN

Period of Record General Climate Summary - Heating Degree Days

Station:(475364) MERRILL
From Year=1905 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	1640	1390	1163	677	336	104	30	61	249	589	1001	1455	8694
60	1485	1249	1008	531	213	41	6	17	143	440	851	1300	7284
57	1392	1164	916	446	151	20	1	6	94	356	761	1207	6516
55	1330	1108	854	391	117	11	0	3	68	303	701	1145	6032
50	1175	967	701	264	52	2	0	0	25	187	554	990	4917

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