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Period of Record General Climate Summary - Heating Degree Days

Station:(475581) MONTELLO
From Year=1954 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	1525	1266	1025	577	264	60	13	32	187	504	896	1357	7706
60	1370	1124	871	437	154	20	2	7	96	361	746	1202	6389
57	1277	1040	780	356	102	9	0	2	58	283	657	1109	5673
55	1215	983	719	305	75	5	0	1	39	235	599	1047	5222
50	1060	842	570	191	30	0	0	0	11	132	455	892	4183

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