SAN JACINTO, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047810) SAN JACINTO
From Year=1893 To Year=1978
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	468	367	328	195	79	13	2	1	8	83	255	440	2238
60	315	231	188	90	23	2	1	0	1	27	133	288	1299
57	229	157	119	48	9	0	1	0	0	11	78	202	854
55	176	113	81	28	4	0	1	0	0	5	51	151	611
50	73	38	23	5	0	0	1	0	0	0	14	58	212

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