CHULA VISTA, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(041758) CHULA VISTA
From Year=1918 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	45	53	76	123	206	271	397	440	388	271	126	49	2445
57	26	30	43	77	147	211	335	378	328	211	83	25	1895
60	9	11	16	31	70	124	242	285	238	127	38	7	1200
65	1	2	2	5	10	23	94	133	102	35	8	0	416
70	0	0	0	1	1	3	15	30	28	6	2	0	85

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