GRAND CANYON NP 2, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(023596) GRAND CANYON N P 2
From Year=1976 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	1050	887	824	603	373	111	19	38	176	501	803	1039	6424
60	895	746	669	453	232	39	1	6	71	349	653	884	4996
57	802	661	576	364	159	19	0	1	35	262	563	791	4233
55	740	605	514	306	119	11	0	0	21	210	503	729	3758
50	585	464	361	177	49	3	0	0	6	105	355	574	2677

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