SAN FRANCISCO RICHMOND, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(047767) SAN FRANCISCO RICHMOND
From Year=1948 To Year=2005
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	9	19	26	30	39	69	104	139	157	131	52	11	786
57	3	8	11	15	17	32	54	84	102	84	28	3	440
60	0	2	3	6	4	8	13	26	41	40	10	0	153
65	0	0	0	1	1	1	1	3	8	11	2	0	27
70	0	0	0	0	0	0	0	0	1	3	0	0	5

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 Apr 5, 2006
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