SIERRA VISTA, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(027880) SIERRA VISTA
From Year=1982 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	6	21	88	228	466	685	738	674	556	314	65	4	3844
57	2	10	58	178	404	625	676	612	496	256	39	1	3358
60	0	3	26	110	313	535	583	519	406	175	15	0	2687
65	0	0	4	34	174	386	428	365	258	69	1	0	1717
70	0	0	0	6	67	238	273	211	120	14	0	0	929

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