Statistical Analysis of Rainfall Trend for Volta Region in Ghana

Table 7

Statistical summary of monthly rainfall data of coastal zone.

Parameters	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mean (mm)	3.3	23.2	61.0	107.3	150.4	206.2	64.9	19.8	56.0	78.7	29.9	11.2
Median (mm)	0.0	11.2	49.0	86.7	145.7	174.2	44.2	10.8	33.9	65.2	22.0	2.5
S.D. (mm)	6.1	30.8	45.8	67.8	60.4	138.5	87.6	31.7	71.0	63.2	29.0	18.3
Variance (mm)	36.8	950.2	2098.5	4606.9	3645.8	19185.3	7675.3	1005.1	5050.3	3997.5	841.2	336.0
Skewness	2.2	1.4	0.7	1.2	0.0	1.2	3.0	3.2	2.5	0.6	0.8	2.6
Kurtosis	4.8	0.9	−0.0	1.9	−0.5	1.1	11.4	12.9	7.7	−0.8	−0.1	6.9
Min (mm)	0.0	0.0	0.0	18.3	34.5	47.0	1.2	0.0	0.0	0.5	0.0	0.0
Max (mm)	22.6	96.3	181.1	324.7	269.6	598.3	443.5	160.6	339.9	210.9	107.6	77.7
Range (mm)	22.6	96.3	181.1	306.4	235.1	551.3	442.3	160.6	339.9	210.4	107.6	77.7
Sum (mm)	102.0	719.5	1890.7	3325.0	4663.9	6391.7	2012.5	612.4	1735.9	2440.0	928.3	347.0
CV	1.8	1.3	0.7	0.6	0.4	0.6	1.3	1.6	1.2	0.8	0.9	1.6