MOUNT HAMILTON, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(045933) MOUNT HAMILTON
From Year=1948 To Year=2006
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	11	9	13	39	120	276	494	472	350	179	37	10	2011
57	6	5	8	26	93	231	434	413	300	142	24	6	1688
60	2	2	3	13	60	170	347	328	229	96	11	2	1263
65	0	0	0	3	23	91	214	199	129	42	2	0	702
70	0	0	0	0	6	39	105	96	56	14	0	0	317

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 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