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Period of Record General Climate Summary - Heating Degree Days

Station:(471978) DANBURY
From Year=1919 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	1711	1412	1172	684	335	110	34	63	253	584	1030	1528	8916
60	1556	1271	1017	537	213	44	7	19	147	436	880	1373	7501
57	1463	1186	925	453	151	22	2	8	98	353	790	1280	6730
55	1401	1130	863	398	117	13	0	4	71	300	730	1218	6245
50	1246	989	710	271	53	2	0	0	26	184	583	1063	5127

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