PALOMAR MTN OBSVTRY, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046657) PALOMAR MOUNTAIN OBSERV
From Year=1901 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	5	6	15	58	159	342	553	553	409	180	34	7	2320
57	2	2	8	39	121	289	491	491	352	139	20	3	1959
60	1	0	2	19	75	215	399	399	270	87	8	1	1476
65	0	0	0	4	25	111	249	250	146	30	0	0	815
70	0	0	0	0	5	42	117	118	56	5	0	0	345

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