BONITA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040968) BONITA
From Year=1915 To Year=1970
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	408	417	509	587	699	764	915	952	871	754	567	454	7898
40 S	408	825	1333	1920	2620	3384	4299	5251	6122	6877	7444	7898	7898
45 M	255	276	354	437	544	614	760	797	721	599	417	300	6074
45 S	255	531	884	1321	1866	2480	3240	4037	4758	5357	5775	6074	6074
50 M	118	143	200	287	389	464	605	642	571	444	268	154	4287
50 S	118	261	461	748	1138	1602	2207	2849	3420	3864	4133	4287	4287
55 M	33	47	73	144	235	314	450	487	421	290	131	50	2676
55 S	33	80	154	298	532	846	1297	1784	2205	2495	2626	2676	2676
60 M	5	8	14	42	94	166	295	332	271	143	42	8	1422
60 S	5	13	27	69	163	329	624	957	1228	1371	1413	1422	1422

Corn Growing Degree Days
50 M	257	250	296	335	404	466	602	636	560	459	359	290	4914
50 S	257	507	803	1138	1542	2008	2610	3246	3806	4265	4624	4914	4914

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