SAN MARCOS RCH, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047861) SAN MARCOS RANCH
From Year=1952 To Year=1960
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	502	396	376	258	159	66	6	12	29	127	288	414	2634
60	349	260	228	131	60	15	1	1	4	43	162	265	1518
57	262	186	151	74	26	5	0	0	1	18	102	184	1008
55	206	141	106	47	13	2	0	0	0	8	73	136	732
50	93	55	32	11	1	0	0	0	0	1	23	49	265

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