CLEARLAKE 4 SE, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(041806) CLEARLAKE 4 SE
From Year=1954 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	693	551	511	359	179	41	5	5	43	210	487	678	3762
60	538	410	357	220	82	11	0	1	11	97	339	523	2589
57	445	325	268	150	44	5	0	0	4	52	253	431	1976
55	383	270	212	110	27	3	0	0	1	32	198	369	1607
50	233	144	96	41	5	0	0	0	0	7	87	222	836

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 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