HOLBROOK, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(024089) HOLBROOK
From Year=1893 To Year=2010
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	981	722	598	352	138	15	0	0	31	285	651	956	4730
60	826	581	444	215	57	3	0	0	8	156	501	801	3592
57	733	497	354	146	30	1	0	0	3	98	411	708	2981
55	671	441	295	108	19	0	0	0	1	68	352	646	2602
50	517	303	165	44	5	0	0	0	0	24	217	492	1766

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