MARTINEZ WTP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045378) MARTINEZ WATER PLANT
From Year=1970 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	219	316	468	561	750	878	983	968	872	702	408	227	7352
40 S	219	535	1003	1564	2314	3191	4175	5142	6015	6717	7125	7352	7352
45 M	93	180	313	411	595	728	828	813	722	547	261	102	5593
45 S	93	273	586	997	1592	2320	3148	3961	4683	5230	5491	5593	5593
50 M	24	68	167	263	440	578	673	658	572	392	130	27	3991
50 S	24	91	259	521	961	1539	2212	2870	3442	3835	3964	3991	3991
55 M	3	12	58	131	286	428	518	503	422	240	42	4	2648
55 S	3	15	74	205	491	918	1437	1939	2362	2602	2644	2648	2648
60 M	0	1	10	46	147	279	363	348	274	111	7	0	1588
60 S	0	1	11	58	205	484	847	1195	1469	1580	1587	1588	1588

Corn Growing Degree Days
50 M	91	156	253	331	455	540	604	599	542	424	216	99	4309
50 S	91	247	500	832	1286	1826	2430	3029	3572	3995	4211	4309	4309

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