RAMONA FIRE DEPT, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047228) RAMONA FIRE DEPT
From Year=1974 To Year=2008
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	393	339	323	224	112	25	1	1	11	80	233	401	2142
60	245	207	181	106	37	4	0	0	1	20	113	252	1166
57	166	136	111	58	14	1	0	0	0	6	63	172	726
55	120	97	74	35	6	0	0	0	0	2	39	125	497
50	38	28	17	7	0	0	0	0	0	0	9	41	140

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