BONITA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(040968) BONITA
From Year=1915 To Year=1970
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	368	291	268	169	90	30	2	1	8	64	191	322	1803
60	217	156	125	55	15	2	0	0	0	9	75	174	829
57	136	89	60	19	3	0	0	0	0	2	31	100	437
55	90	54	30	7	1	0	0	0	0	0	14	61	257
50	20	8	2	0	0	0	0	0	0	0	1	10	42

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