GRIDLEY, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043639) GRIDLEY
From Year=1893 To Year=1955
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	132	242	384	596	821	976	1193	1113	982	710	353	190	7692
40 S	132	374	757	1353	2175	3150	4343	5456	6439	7149	7502	7692	7692
45 M	43	121	233	446	666	826	1038	958	832	555	210	78	6007
45 S	43	164	397	843	1510	2335	3373	4332	5164	5719	5929	6007	6007
50 M	7	37	111	299	512	676	883	803	682	401	92	20	4524
50 S	7	45	155	455	966	1642	2525	3329	4011	4412	4504	4524	4524
55 M	1	4	37	170	359	526	729	648	532	254	26	3	3290
55 S	1	6	43	213	572	1097	1826	2474	3007	3261	3287	3290	3290
60 M	0	0	8	78	217	376	574	493	383	128	5	0	2263
60 S	0	0	8	85	303	679	1253	1746	2130	2258	2263	2263	2263

Corn Growing Degree Days
50 M	59	133	208	359	508	608	724	679	599	444	208	83	4611
50 S	59	192	400	760	1267	1875	2599	3278	3876	4321	4529	4611	4611

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