ALAMO DAM, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(020100) ALAMO DAM
From Year=1975 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	17	62	194	402	700	962	1169	1121	888	542	164	16	6236
57	8	37	147	345	638	902	1107	1059	828	480	122	7	5678
60	2	14	89	264	545	812	1014	966	738	389	70	1	4905
65	0	1	30	147	394	662	859	811	588	248	19	0	3759
70	0	0	6	64	255	513	704	656	439	130	2	0	2767

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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