PALOMAR MOUNTAIN OBSERV, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046657) PALOMAR MOUNTAIN OBSERV
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	4	6	16	54	153	348	559	553	407	185	34	5	2325
57	2	3	9	36	116	295	497	491	351	143	20	2	1965
60	1	1	3	18	72	221	405	399	269	91	8	1	1486
65	0	0	0	4	24	115	254	251	146	32	0	0	826
70	0	0	0	0	5	45	122	120	57	6	0	0	354

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