TUCSON WFO, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(028815) TUCSON UNIV OF ARIZONA
From Year=1894 To Year=2008
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	417	297	203	70	10	0	0	0	0	29	194	399	1620
60	269	173	98	25	2	0	0	0	0	9	95	252	923
57	190	114	57	11	1	0	0	0	0	4	56	175	605
55	144	82	37	6	0	0	0	0	0	2	38	130	439
50	62	29	9	1	0	0	0	0	0	0	12	53	165

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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