OJAI, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046399) OJAI
From Year=1905 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	352	366	466	555	687	805	1013	1019	913	756	525	377	7834
40 S	352	718	1185	1740	2426	3231	4244	5263	6176	6932	7457	7834	7834
45 M	207	228	312	405	532	655	858	864	763	601	375	229	6029
45 S	207	435	748	1153	1684	2339	3197	4061	4824	5425	5801	6029	6029
50 M	91	110	170	259	377	505	703	709	613	446	232	105	4320
50 S	91	201	371	630	1007	1511	2214	2924	3537	3983	4215	4320	4320
55 M	26	37	67	130	227	355	548	554	463	294	113	32	2844
55 S	26	63	130	260	487	842	1389	1944	2407	2700	2813	2844	2844
60 M	4	8	17	49	104	210	393	399	314	157	40	5	1699
60 S	4	12	29	78	181	392	784	1184	1498	1655	1694	1699	1699

Corn Growing Degree Days
50 M	259	254	313	356	425	494	617	618	555	479	366	278	5014
50 S	259	512	825	1181	1606	2100	2717	3335	3890	4369	4736	5014	5014

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 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