OROVILLE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046521) OROVILLE
From Year=1953 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	197	303	450	577	828	1026	1220	1161	969	745	405	207	8088
40 S	197	500	950	1527	2355	3381	4601	5762	6732	7477	7882	8088	8088
45 M	83	170	297	427	673	876	1065	1006	819	590	258	91	6357
45 S	83	254	551	978	1651	2527	3593	4598	5418	6008	6267	6357	6357
50 M	23	66	161	282	518	726	910	851	669	436	131	24	4797
50 S	23	89	250	531	1050	1776	2686	3537	4206	4642	4773	4797	4797
55 M	3	14	63	155	367	576	755	696	519	287	46	3	3484
55 S	3	17	80	235	602	1178	1933	2629	3148	3435	3481	3484	3484
60 M	0	1	16	68	229	427	600	541	371	154	10	0	2416
60 S	0	1	16	84	313	740	1340	1881	2252	2406	2416	2416	2416

Corn Growing Degree Days
50 M	90	157	245	342	510	639	745	708	602	460	227	97	4822
50 S	90	247	493	835	1345	1984	2729	3437	4039	4499	4726	4822	4822

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