BEN LOMOND 4, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(040673) BEN LOMOND 4
From Year=1972 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	485	384	355	251	145	52	15	12	32	135	343	496	2705
60	331	245	207	122	47	7	0	0	3	42	200	341	1546
57	240	167	130	63	16	1	0	0	0	15	126	250	1008
55	183	120	87	36	6	0	0	0	0	6	86	192	716
50	69	37	21	5	0	0	0	0	0	0	24	74	230

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