SAN RAFAEL CIVIC CENTER, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047880) SAN RAFAEL CIVIC CENTER
From Year=1948 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	268	351	457	531	661	756	860	861	812	713	467	296	7033
40 S	268	619	1076	1607	2268	3024	3884	4745	5558	6270	6737	7033	7033
45 M	130	214	302	381	506	606	705	706	662	558	317	156	5244
45 S	130	343	646	1027	1533	2139	2844	3550	4212	4770	5088	5244	5244
50 M	40	93	157	234	351	456	550	551	512	403	176	54	3578
50 S	40	133	291	524	876	1331	1881	2433	2945	3348	3524	3578	3578
55 M	6	21	53	108	201	306	395	396	362	250	67	11	2176
55 S	6	27	81	188	389	696	1090	1487	1849	2099	2166	2176	2176
60 M	0	2	10	35	87	164	241	242	215	115	16	1	1126
60 S	0	2	12	47	134	298	538	780	995	1110	1125	1126	1126

Corn Growing Degree Days
50 M	105	164	231	290	373	447	532	535	494	417	236	121	3944
50 S	105	269	500	790	1163	1610	2141	2676	3170	3587	3822	3944	3944

M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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