WEAVERVILLE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049490) WEAVERVILLE RANGER STN
From Year=1894 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	36	89	188	326	556	742	981	937	728	458	154	39	5233
40 S	36	124	312	638	1194	1936	2916	3853	4581	5039	5193	5233	5233
45 M	6	26	86	197	404	592	826	782	578	310	61	9	3876
45 S	6	32	118	315	719	1311	2137	2919	3497	3806	3867	3876	3876
50 M	1	4	29	98	262	443	671	627	429	179	15	1	2760
50 S	1	4	33	132	394	837	1508	2135	2564	2743	2759	2760	2760
55 M	0	0	6	36	146	300	516	472	287	80	2	0	1845
55 S	0	0	6	42	187	488	1003	1476	1762	1843	1844	1845	1845
60 M	0	0	1	8	64	176	362	320	160	25	0	0	1117
60 S	0	0	1	9	73	249	611	931	1092	1117	1117	1117	1117

Corn Growing Degree Days
50 M	27	82	163	258	392	475	573	557	488	363	118	20	3516
50 S	27	109	272	530	922	1396	1970	2527	3015	3378	3495	3516	3516

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