ROCKLIN, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047516) ROCKLIN
From Year=1948 To Year=1976
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	126	219	347	494	743	945	1160	1121	941	677	345	148	7266
40 S	126	345	692	1186	1930	2874	4035	5155	6097	6773	7118	7266	7266
45 M	47	101	201	345	588	795	1005	966	791	522	204	56	5622
45 S	47	148	349	695	1283	2078	3083	4049	4840	5362	5566	5622	5622
50 M	12	32	88	208	434	645	850	811	641	369	93	14	4197
50 S	12	44	131	340	774	1419	2269	3080	3721	4090	4183	4197	4197
55 M	2	5	26	101	287	495	695	656	492	226	29	2	3015
55 S	2	7	33	134	421	916	1611	2267	2758	2984	3014	3015	3015
60 M	0	0	4	36	161	348	540	501	343	108	5	0	2047
60 S	0	0	4	40	201	549	1090	1590	1934	2042	2047	2047	2047

Corn Growing Degree Days
50 M	64	128	212	315	460	567	672	654	569	433	215	79	4367
50 S	64	192	404	719	1179	1746	2418	3072	3641	4073	4288	4367	4367

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 Jul 28, 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