SAN RAFAEL CIVIC CENTER, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047880) SAN RAFAEL CIVIC CENTER
From Year=1948 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	509	355	320	226	144	60	17	16	32	98	285	482	2542
60	354	216	174	103	45	8	1	1	3	22	149	328	1402
57	263	138	100	50	14	1	0	0	0	5	83	238	894
55	205	94	62	26	5	0	0	0	0	2	51	182	626
50	84	25	11	2	0	0	0	0	0	0	9	71	202

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 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