CONCORD WASTEWATER PLAN, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(041967) CONCORD WASTEWATER PLAN
From Year=1991 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	6	23	90	160	319	451	551	561	485	311	74	11	3043
57	2	10	57	116	258	391	489	499	425	250	45	5	2547
60	0	2	23	63	173	302	396	406	335	165	18	1	1886
65	0	0	3	18	69	164	242	252	189	61	1	0	1000
70	0	0	0	3	21	68	106	111	75	14	0	0	399

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