GRATON, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043578) GRATON
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	190	268	363	446	602	717	802	803	737	610	361	201	6101
40 S	190	459	822	1268	1869	2586	3388	4192	4929	5539	5901	6101	6101
45 M	76	139	212	297	447	567	647	648	587	455	216	83	4375
45 S	76	215	427	724	1171	1737	2385	3033	3620	4076	4292	4375	4375
50 M	18	47	90	159	292	417	492	493	437	302	97	22	2866
50 S	18	66	155	314	606	1022	1515	2008	2445	2747	2844	2866	2866
55 M	2	8	24	59	148	267	337	338	288	159	27	2	1661
55 S	2	10	34	94	242	509	847	1185	1473	1631	1659	1661	1661
60 M	0	0	4	15	53	131	184	185	146	58	4	0	781
60 S	0	1	4	19	72	204	388	573	719	777	781	781	781

Corn Growing Degree Days
50 M	101	160	225	292	385	447	501	502	462	397	227	112	3808
50 S	101	260	485	777	1162	1609	2110	2611	3073	3470	3697	3808	3808

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 Jul 28, 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