PORTAL 4 SW, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(026716) PORTAL 4 SW
From Year=1965 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	0	1	4	39	173	398	502	438	275	73	2	0	1905
57	0	0	1	20	124	339	440	376	217	43	1	0	1560
60	0	0	0	7	64	250	347	283	134	16	0	0	1101
65	0	0	0	1	13	118	192	132	33	1	0	0	489
70	0	0	0	0	2	33	58	23	2	0	0	0	118

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