SAN MARCOS RCH, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(047861) SAN MARCOS RANCH
From Year=1952 To Year=1960
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	13	28	41	96	182	299	501	447	392	225	90	31	2345
57	7	17	23	62	133	241	439	385	333	172	60	18	1890
60	2	6	8	29	74	162	347	293	246	105	29	6	1304
65	0	1	0	6	18	63	197	149	120	34	6	0	594
70	0	0	0	0	3	19	78	45	39	9	0	0	193

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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