PHOENIX SKY HARBOR INTL AP, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(026481) PHOENIX WSFO AP
From Year=1933 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	57	109	250	458	744	990	1182	1131	933	609	225	57	6745
57	34	76	199	400	682	930	1120	1069	873	547	178	32	6140
60	13	39	133	316	589	840	1027	976	783	456	115	10	5298
65	1	8	55	189	437	690	872	821	634	311	43	1	4060
70	0	1	15	91	292	540	717	666	484	182	10	0	2998

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