PHANTOM RANCH, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(026471) PHANTOM RANCH
From Year=1966 To Year=2006
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	4	32	182	402	701	966	1125	1038	809	473	109	5	5847
57	2	17	139	347	639	906	1063	976	749	413	77	2	5330
60	0	5	87	268	547	816	970	883	659	326	40	0	4602
65	0	1	31	152	397	666	815	728	509	194	8	0	3501
70	0	0	6	67	256	517	660	573	360	92	1	0	2533

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 Jul 28, 2006
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