PHANTOM RCH, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(026471) PHANTOM RANCH
From Year=1966 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	567	358	189	56	6	0	0	0	0	34	255	557	2023
60	412	221	90	21	1	0	0	0	0	10	138	403	1297
57	320	148	50	10	0	0	0	0	0	4	84	312	929
55	261	106	31	6	0	0	0	0	0	2	57	253	715
50	126	36	7	1	0	0	0	0	0	0	17	120	307

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