ALAMO DAM, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(020100) ALAMO DAM
From Year=1975 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	435	286	165	49	5	0	0	0	0	16	188	448	1593
60	282	158	69	15	1	0	0	0	0	3	90	294	912
57	195	96	34	6	0	0	0	0	0	1	51	206	590
55	143	65	20	3	0	0	0	0	0	0	33	153	417
50	49	18	3	0	0	0	0	0	0	0	8	55	133

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