CHULA VISTA, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(041758) CHULA VISTA
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	61	66	91	139	221	291	416	464	422	307	145	54	2676
57	35	39	55	92	162	231	354	402	362	246	97	28	2103
60	13	15	21	41	83	143	261	309	272	159	45	8	1369
65	2	2	3	8	16	35	112	156	129	49	9	0	520
70	0	0	0	1	2	5	20	41	37	8	2	0	117

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