TUCSON INTL AP, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(028820) TUCSON WSO AP
From Year=1930 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	37	73	169	345	609	868	982	926	784	495	172	41	5500
57	21	47	126	290	547	808	920	864	724	434	131	22	4935
60	7	21	75	214	456	718	827	771	634	347	78	7	4153
65	0	3	22	106	308	568	672	616	485	211	22	0	3012
70	0	0	3	36	175	418	517	461	335	101	3	0	2049

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