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Casper September Precipitation Totals

A time series of total precipitation in the month of September in Casper, Wyoming from 1901–2023.

Rainiest September in Casper History

The rainiest September in Casper, Wyoming history happened in 1915, with 4.48 inches of total precipitation.

Driest September in Casper History

There have been 2 times where no rain was recorded in Casper, Wyoming for the entire month of September. The most recent time this happened was 1932.

Casper Average September Precipitation by Year

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Year	Precipitation (inches)
2023	0.59
2022	0.81
2021	0.79
2020	0.54
2019	1.41
2018	0.28
2017	1.42
2016	1.55
2015	0.19
2014	0.64
2013	1.47
2012	0.31
2011	0.10
2010	0.28
2009	1.62
2008	0.74
2007	0.71
2006	1.40
2005	0.23
2004	1.75
2003	1.38
2002	1.12
2001	1.09
2000	1.65
1999	1.30
1998	0.79
1997	1.21
1996	0.47
1995	2.56
1994	0.68
1993	0.97
1992	0.29
1991	0.40
1990	0.52
1989	3.22
1988	0.74
1987	0.59
1986	1.31
1985	1.09
1984	0.50
1983	0.20
1982	3.40
1981	0.23
1980	0.10
1979	0.18
1978	0.26
1977	0.30
1976	1.15
1975	0.11
1974	0.83
1973	3.28
1972	0.37
1971	0.74
1970	0.21
1969	0.16
1968	0.30
1967	1.67
1966	0.39
1965	2.07
1964	0.34
1963	0.33
1962	1.14
1961	2.46
1960	0.41
1959	1.99
1958	0.34
1957	1.08
1956	0.07
1955	0.65
1954	0.23
1953	0.21
1952	0.25
1951	1.12
1950	3.11
1949	0.66
1948	0.89
1940	0.75
1939	0.98
1938	1.43
1936	0.20
1935	0.91
1934	2.57
1933	1.32
1932	0.00
1931	0.40
1922	0.24
1921	0.57
1920	0.53
1917	0.33
1916	0.51
1915	4.48
1914	0.13
1901	0.00

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