WHISKEYTOWN RESERVOIR, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049621) WHISKEYTOWN RESERVOIR
From Year=1960 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	167	222	362	485	772	979	1228	1202	995	728	332	166	7639
40 S	167	389	751	1236	2008	2988	4215	5418	6412	7141	7473	7639	7639
45 M	68	110	221	340	617	829	1073	1047	845	574	196	65	5986
45 S	68	178	399	739	1357	2186	3259	4306	5151	5725	5921	5986	5986
50 M	19	43	112	212	464	679	918	892	695	422	95	17	4568
50 S	19	62	174	386	850	1529	2447	3339	4034	4456	4551	4568	4568
55 M	4	13	46	112	320	531	763	737	546	283	37	3	3394
55 S	4	16	62	174	494	1025	1788	2526	3071	3355	3391	3394	3394
60 M	0	2	13	48	196	387	608	583	400	167	10	0	2413
60 S	0	2	15	62	258	645	1253	1836	2236	2403	2413	2413	2413

Corn Growing Degree Days
50 M	80	114	197	276	469	618	761	737	614	436	165	75	4542
50 S	80	194	391	667	1136	1754	2515	3252	3866	4302	4467	4542	4542

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 Apr 5, 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