TUCSON 17 NW, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(028795) TUCSON 17 NW
From Year=1982 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	359	264	162	60	4	0	0	0	0	19	167	386	1421
60	219	148	77	23	0	0	0	0	0	5	83	242	799
57	148	95	43	11	0	0	0	0	0	2	49	169	517
55	108	67	28	6	0	0	0	0	0	1	33	129	371
50	42	22	6	1	0	0	0	0	0	0	9	57	138

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