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Period of Record General Climate Summary - Heating Degree Days

Station:(215325) MELROSE
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	1727	1394	1126	624	272	62	12	33	211	563	1032	1535	8591
60	1572	1253	972	479	160	19	2	8	114	417	882	1380	7256
57	1479	1168	879	396	107	8	0	2	71	335	792	1287	6525
55	1417	1111	817	343	80	4	0	1	50	283	732	1225	6064
50	1262	970	665	223	33	0	0	0	16	171	584	1070	4996

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