AJO, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(020080) AJO
From Year=1914 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	52	113	224	417	672	924	1097	1040	890	599	233	78	6340
57	31	81	176	361	611	864	1035	978	830	538	186	51	5742
60	12	45	115	280	519	774	942	885	740	447	125	24	4909
65	1	12	45	163	370	624	787	730	590	304	51	4	3681
70	0	1	11	76	233	474	632	575	441	180	13	0	2637

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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