UPPER LAKE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049173) UPPER LAKE
From Year=1893 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	142	192	301	424	592	786	1008	973	793	573	301	147	6233
40 S	142	334	636	1060	1653	2439	3447	4420	5213	5786	6087	6233	6233
45 M	49	84	168	278	437	636	853	818	643	419	163	47	4596
45 S	49	133	301	579	1016	1653	2506	3324	3967	4386	4549	4596	4596
50 M	9	22	75	152	287	486	698	663	493	271	61	7	3225
50 S	9	31	106	258	545	1031	1729	2393	2886	3156	3218	3225	3225
55 M	1	3	23	63	158	339	543	508	345	143	14	1	2141
55 S	1	4	27	90	248	587	1130	1639	1983	2127	2140	2141	2141
60 M	0	0	3	18	70	204	389	354	205	55	1	0	1300
60 S	0	0	4	21	91	295	684	1038	1244	1299	1300	1300	1300

Corn Growing Degree Days
50 M	90	126	200	281	380	490	602	584	503	405	217	101	3979
50 S	90	215	416	697	1077	1567	2169	2753	3256	3661	3878	3979	3979

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