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Interior September Precipitation Totals

A time series of total precipitation in the month of September in Interior, South Dakota from 1955–2023.

Rainiest September in Interior History

The rainiest September in Interior, South Dakota history happened in 1955, with 4.12 inches of total precipitation.

Driest September in Interior History

The driest September in Interior, South Dakota history happened in 2012, with just 0.01 inches of total precipitation.

Interior Average September Precipitation by Year

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Year	Precipitation (inches)
2023	1.49
2022	0.23
2021	1.82
2020	0.71
2019	1.78
2018	1.24
2017	1.67
2016	0.33
2015	1.07
2014	1.88
2013	1.18
2012	0.01
2011	1.59
2010	0.84
2009	0.08
2008	2.76
2007	0.61
2006	3.05
2005	0.55
2004	4.09
2003	1.10
2002	2.66
2001	0.34
2000	0.24
1999	3.11
1998	0.82
1997	0.92
1996	3.16
1995	0.86
1994	0.50
1993	2.62
1992	0.16
1991	1.66
1990	0.54
1989	4.08
1988	0.79
1987	0.41
1986	3.53
1985	1.88
1983	0.29
1982	1.36
1981	0.24
1980	0.23
1979	0.03
1978	0.86
1977	2.16
1976	0.30
1975	0.10
1974	0.60
1973	2.57
1972	0.16
1971	2.35
1970	1.83
1969	0.33
1968	0.67
1967	1.98
1966	1.71
1965	1.53
1964	0.27
1963	1.55
1962	0.61
1961	1.88
1960	0.35
1959	2.41
1958	0.04
1957	0.55
1956	0.70
1955	4.12

Its possible for precipitation totals to include both rain and melted snowfall
Months with more than 10% missing data are excluded