Y LIGHTNING RCH, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(029562) Y LIGHTNING RANCH
From Year=1939 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	10	15	126	325	467	759	750	773	602	375	67	11	4279
57	2	5	88	271	406	699	688	711	542	317	44	7	3778
60	0	2	40	192	318	609	595	618	452	235	23	2	3086
65	0	0	4	87	180	459	440	463	305	118	2	0	2057
70	0	0	0	22	72	309	285	308	163	28	0	0	1187

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