PHOENIX S MTN, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(026479) PHOENIX SOUTH MOUNTAIN
From Year=1975 To Year=1983
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	392	265	253	87	17	0	0	0	0	25	150	310	1500
60	249	148	138	43	3	0	0	0	0	4	76	181	841
57	176	94	84	25	0	0	0	0	0	1	44	120	544
55	134	66	57	17	0	0	0	0	0	0	29	87	390
50	56	22	15	3	0	0	0	0	0	0	10	32	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