BERRYESSA LAKE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040705) BERRYESSA LAKE
From Year=1957 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	222	300	391	521	738	938	1144	1147	975	786	447	245	7854
40 S	222	521	913	1434	2171	3110	4254	5402	6377	7163	7609	7854	7854
45 M	92	164	239	373	583	788	989	992	825	631	297	114	6089
45 S	92	257	496	869	1451	2240	3229	4222	5047	5678	5975	6089	6089
50 M	23	60	110	238	428	638	834	837	675	476	161	34	4517
50 S	23	83	194	432	860	1498	2333	3170	3845	4322	4483	4517	4517
55 M	3	12	35	129	280	489	679	682	525	322	64	8	3228
55 S	3	16	51	179	459	948	1627	2309	2835	3157	3221	3228	3228
60 M	1	0	7	51	150	342	524	528	375	179	18	2	2177
60 S	1	1	8	58	209	550	1075	1602	1978	2157	2175	2177	2177

Corn Growing Degree Days
50 M	102	149	211	304	444	581	711	710	611	475	236	106	4639
50 S	102	251	461	766	1210	1791	2502	3212	3823	4298	4533	4639	4639

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