WILLIAMS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049677) WILLIAMS
From Year=1952 To Year=1988
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	173	280	421	569	839	1041	1193	1132	959	736	378	193	7913
40 S	173	453	873	1443	2281	3322	4515	5647	6606	7342	7720	7913	7913
45 M	66	145	268	420	684	891	1038	977	809	581	234	79	6191
45 S	66	212	480	899	1583	2474	3512	4489	5298	5879	6113	6191	6191
50 M	18	51	136	275	529	741	883	822	659	427	115	18	4672
50 S	18	69	204	480	1008	1749	2632	3454	4113	4540	4655	4672	4672
55 M	4	11	50	151	376	591	728	667	509	277	41	3	3407
55 S	4	15	65	215	591	1182	1910	2577	3086	3363	3404	3407	3407
60 M	0	1	12	64	233	441	573	512	360	148	10	0	2356
60 S	0	2	14	78	311	752	1325	1837	2197	2346	2356	2356	2356

Corn Growing Degree Days
50 M	85	156	248	350	519	641	716	680	586	458	221	98	4758
50 S	85	241	489	839	1358	1998	2714	3395	3981	4438	4659	4758	4758

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