CANYON DE CHELLY, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(021248) CANYON DE CHELLY
From Year=1970 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	1032	782	621	379	153	20	0	1	55	346	707	1021	5117
60	877	641	467	240	68	4	0	0	17	207	557	866	3943
57	784	556	376	170	37	1	0	0	7	139	467	773	3311
55	722	499	317	130	24	0	0	0	4	103	409	711	2919
50	567	360	186	58	6	0	0	0	1	44	270	556	2048

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