PASADENA, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(046719) PASADENA
From Year=1893 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	68	80	125	195	288	412	595	612	534	372	181	73	3533
57	44	53	87	147	230	352	533	550	474	312	134	45	2962
60	21	27	46	90	151	264	440	457	384	226	79	19	2204
65	4	6	12	32	58	133	285	303	239	110	25	2	1210
70	0	1	2	9	16	46	139	157	121	42	5	0	539

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