DOUGLAS, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(022659) DOUGLAS
From Year=1948 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	581	429	325	146	27	0	0	0	2	95	366	581	2554
60	427	290	191	60	6	0	0	0	0	32	224	427	1656
57	334	210	126	31	3	0	0	0	0	16	150	335	1204
55	275	162	89	20	2	0	0	0	0	9	109	276	941
50	142	69	31	5	0	0	0	0	0	2	43	146	439

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