SAN GABRIEL FIRE DEP, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(047785) SAN GABRIEL FIRE DEPT
From Year=1939 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	90	138	222	330	446	617	640	564	405	185	77	3790
57	49	58	95	169	269	386	555	578	504	343	136	46	3189
60	21	27	48	103	182	296	462	485	414	253	76	18	2385
65	3	5	10	35	71	156	307	330	266	122	20	1	1325
70	0	0	1	8	18	53	155	177	133	42	3	0	591

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