SPALDING 1 NW, MICHIGAN

Period of Record General Climate Summary - Heating Degree Days

Station:(207742) SPALDING 1 SSE
From Year=1953 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1254	1311	1044	-99	435	42	39	23	142	555	960	1379	-99
60	1099	1171	889	-99	296	13	7	1	65	419	810	1224	-99
57	1005	1087	796	-99	220	4	2	0	34	343	720	1131	-99
55	944	1031	734	-99	179	2	0	0	21	293	660	1069	-99
50	789	891	581	-99	106	0	0	0	6	175	510	914	-99

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