SAN FRAN ACAD OF SCI, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(047765) SAN FRANCISCO ACAD OF S
From Year=1951 To Year=1957
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	4	15	20	27	52	67	52	60	147	117	61	8	630
57	1	6	12	14	29	36	19	27	98	75	34	2	354
60	0	1	5	5	14	16	3	6	46	34	14	0	144
65	0	0	0	1	4	4	0	0	14	10	4	0	36
70	0	0	0	0	1	0	0	0	3	3	0	0	7

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