SAN DIEGO LINDBERGH FLD, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(047740) SAN DIEGO WSO AIRPORT
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	77	86	127	184	258	326	453	496	445	345	196	90	3084
57	45	51	79	128	197	266	391	434	385	283	141	52	2452
60	16	19	31	60	109	176	298	341	295	192	73	18	1628
65	2	3	5	11	19	48	144	187	148	65	16	1	648
70	0	0	0	2	2	7	34	55	45	14	3	0	162

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