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Period of Record General Climate Summary - Heating Degree Days

Station:(479304) WINTER 5 NW
From Year=1915 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	1743	1490	1264	762	410	158	65	105	317	651	1068	1558	9592
60	1588	1348	1109	615	278	76	19	39	198	500	918	1403	8091
57	1495	1264	1017	528	208	44	7	18	138	413	828	1310	7270
55	1433	1207	955	471	167	29	3	10	105	358	769	1248	6754
50	1278	1066	801	337	86	8	0	2	45	230	620	1093	5567

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