SAN DIEGO LINDBERGH FLD, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047740) SAN DIEGO WSO AIRPORT
From Year=1914 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	267	216	194	128	71	22	1	0	3	30	123	242	1299
60	127	91	65	27	6	0	0	0	0	2	30	104	453
57	62	38	20	6	1	0	0	0	0	0	8	45	181
55	33	17	7	2	0	0	0	0	0	0	3	21	83
50	4	1	0	0	0	0	0	0	0	0	0	2	7

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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