COPCO #1 DAM, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(041990) COPCO NO 1 DAM
From Year=1959 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	873	782	749	567	265	190	15	1	19	331	703	933	5428
60	718	639	594	426	162	103	2	0	4	205	553	778	4183
57	625	554	501	345	110	62	0	0	1	140	463	685	3486
55	563	497	439	292	79	43	0	0	0	104	403	623	3043
50	411	354	285	169	23	14	0	0	0	43	253	468	2020

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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