ARIVACA, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(020380) ARIVACA 1 E
From Year=1899 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	562	371	270	213	86	2	0	0	5	83	230	436	2257
60	407	236	146	98	18	0	0	0	0	23	108	287	1321
57	315	165	93	53	4	0	0	0	0	7	57	205	897
55	258	125	64	35	1	0	0	0	0	3	34	153	673
50	141	51	21	10	0	0	0	0	0	0	4	47	273

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