ALPINE, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(020159) ALPINE
From Year=1904 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	1126	959	906	694	509	253	120	172	325	602	855	1075	7595
60	971	817	751	544	355	123	22	46	178	447	705	920	5880
57	878	732	659	454	265	66	4	12	103	355	615	827	4969
55	816	676	597	394	208	40	1	4	64	294	555	765	4413
50	661	534	443	248	91	8	0	0	13	154	406	610	3167

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