ST MICHAELS 6 WNW, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(027440) ST MICHAELS 6 WNW
From Year=1906 To Year=1927
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1160	937	826	588	367	82	6	17	164	506	808	1129	6591
60	1005	796	671	438	221	26	0	1	63	354	658	974	5207
57	912	711	578	349	147	11	0	0	32	266	568	881	4454
55	850	655	516	290	107	6	0	0	19	212	508	819	3982
50	695	514	362	159	40	2	0	0	5	103	359	664	2901

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