SAN MIGUEL ISLAND, wr

Period of Record General Climate Summary - Cooling Degree Days

Station:(967803) SAN MIGUEL ISLAND
From Year=1981 To Year=2002
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	31	19	32	71	74	141	237	236	195	174	70	83	1363
57	15	10	14	43	43	90	175	174	135	116	38	56	910
60	3	3	3	20	18	34	94	92	60	54	15	24	420
65	0	0	0	4	3	3	22	18	7	16	2	2	76
70	0	0	0	1	0	0	4	1	0	3	0	0	9

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 Sep 17, 2007
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