MONTEZUMA CASTLE NM, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(025635) MONTEZUMA CASTLE N M
From Year=1938 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	679	507	391	189	44	2	0	0	3	111	433	687	3048
60	524	366	245	90	13	0	0	0	0	43	286	532	2101
57	431	284	169	53	5	0	0	0	0	23	205	439	1609
55	370	230	126	36	3	0	0	0	0	14	157	378	1314
50	221	117	51	11	0	0	0	0	0	4	68	228	699

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