SAN RAFAEL CIVIC CTR, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(047880) SAN RAFAEL CIVIC CENTER
From Year=1894 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	513	365	332	237	152	65	18	18	37	107	292	491	2627
60	358	226	186	112	50	10	1	1	5	27	155	337	1466
57	267	148	110	56	16	2	0	0	1	7	88	247	943
55	208	102	71	31	6	1	0	0	1	3	54	190	666
50	85	29	14	3	0	0	0	0	0	0	11	75	217

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 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