GILLESPIE FLD, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043410) GILLESPIE FIELD
From Year=1959 To Year=1979
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	412	431	528	602	757	867	1059	1096	986	829	580	417	8565
40 S	412	844	1372	1974	2731	3598	4657	5752	6739	7568	8148	8565	8565
45 M	261	290	373	452	602	717	904	941	836	674	430	264	6744
45 S	261	551	924	1376	1978	2695	3599	4539	5376	6050	6480	6744	6744
50 M	128	154	222	303	447	567	749	786	686	519	281	128	4970
50 S	128	283	505	807	1254	1821	2570	3355	4042	4561	4843	4970	4970
55 M	41	51	94	161	292	417	594	631	536	366	145	35	3362
55 S	41	92	186	346	639	1056	1649	2280	2817	3182	3327	3362	3362
60 M	6	8	21	56	147	268	439	476	386	217	48	3	2075
60 S	6	14	35	91	239	507	945	1421	1807	2024	2072	2075	2075

Corn Growing Degree Days
50 M	283	279	312	356	449	545	706	735	641	519	369	284	5479
50 S	283	562	873	1229	1678	2223	2929	3665	4306	4825	5194	5479	5479

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