COTTONWOOD, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(022193) COTTONWOOD
From Year=1949 To Year=1977
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	679	495	406	193	55	3	0	0	2	99	395	662	2990
60	524	355	261	93	18	0	0	0	0	43	250	507	2052
57	432	274	184	54	8	0	0	0	0	24	173	415	1564
55	370	222	141	38	4	0	0	0	0	16	130	353	1276
50	224	114	63	13	1	0	0	0	0	6	54	208	683

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 Jul 28, 2006
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