First Day of Autumn in Sioux Falls

Year

Date

Max

Min

Precip

Snowfall

SOG*

1903
9/24
73
35
0
0
M
1904
9/23
83
57
0
0
M
1905
9/23
80
48
0
0
M
1906
9/23
78
49
0
0
M
1907
9/24
62
37
0
0
M
1908
9/23
85
48
0
0
M
1909
9/23
83
40
0
0
M
1910
9/23
64
40
T
0
M
1911
9/23
85
59
0
0
M
1912
9/23
78
40
0
0
M
1913
9/23
69
40
0.7
0
M
1914
9/23
72
41
0
0
M
1915
9/23
79
46
0
0
M
1916
9/23
76
33
0
0
M
1917
9/23
85
52
0
0
M
1918
9/23
84
50
0
0
M
1919
9/23
86
42
0
0
M
1920
9/23
77
60
0.39
0
M
1921
9/23
82
50
T
0
M
1922
9/23
80
55
0
0
M
1923
9/23
80
59
0
0
M
1924
9/23
76
50
0
0
M
1925
9/23
73
43
0
0
M
1926
9/23
66
50
0
0
M
1927
9/23
65
42
0
0
M
1928
9/23
57
32
0
0
M
1929
9/23
80
68
0
0
M
1930
9/23
83
69
0
0
M
1931
9/23
65
43
0
0
M
1932
9/23
63
37
0
0
0
1933
9/23
70
55
T
0
0
1934
9/23
70
40
0
0
0
1935
9/23
92
66
0
0
0
1936
9/23
82
60
0
0
0
1937
9/23
85
70
0.27
0
0
1938
9/23
88
55
0
0
0
1939
9/23
79
46
0
0
0
1940
9/22
85
63
0
0
0
1941
9/23
76
47
0
0
0
1942
9/23
49
34
T
0
0
1943
9/23
67
38
0
0
0
1944
9/22
58
45
0.08
0
0
1945
9/23
70
52
0
0
0
1946
9/23
50
38
0.01
0
0
1947
9/23
80
47
0
0
0
1948
9/22
68
54
0
0
0
1949
9/23
68
33
0
0
0
1950
9/23
69
45
0
0
0
1951
9/23
51
38
1.01
0
0
1952
9/22
61
37
0
0
0
1953
9/23
77
51
T
0
0
1954
9/23
80
49
0
0
0
1955
9/23
63
40
0
0
0
1956
9/22
71
43
T
0
0
1957
9/23
66
37
0
0
0
1958
9/23
82
68
T
0
0
1959
9/23
63
49
0
0
0
1960
9/22
60
43
0.06
0
0
1961
9/23
51
41
0.02
0
0
1962
9/23
71
48
T
0
0
1963
9/23
70
52
0.03
0
0
1964
9/22
67
48
0.11
0
0
1965
9/23
43
35
0
0
0
1966
9/23
71
40
0
0
0
1967
9/23
67
40
0
0
0
1968
9/22
78
63
0.99
0
0
1969
9/23
61
40
0
0
0
1970
9/23
64
42
0.4
0
0
1971
9/23
71
33
0
0
0
1972
9/22
70
42
0
0
0
1973
9/22
78
45
0
0
0
1974
9/23
79
49
T
0
0
1975
9/23
66
42
0
0
0
1976
9/22
81
35
0
0
0
1977
9/22
65
52
T
0
0
1978
9/23
77
50
0
0
0
1979
9/23
75
49
0
0
0
1980
9/22
63
39
T
0
0
1981
9/22
72
45
0
0
0
1982
9/23
76
46
0
0
0
1983
9/23
66
28
0
0
0
1984
9/22
70
46
0.02
0
0
1985
9/22
60
49
0.16
0
0
1986
9/23
70
50
0
0
0
1987
9/23
81
40
0
0
0
1988
9/22
69
45
0
0
0
1989
9/22
60
34
0
0
0
1990
9/23
64
33
0
0
0
1991
9/23
57
34
0.68
0
0
1992
9/22
62
37
0
0
0
1993
9/22
59
42
T
0
0
1994
9/23
61
45
0.04
0
0
1995
9/23
65
44
0
0
0
1996
9/22
66
40
T
0
0
1997
9/22
53
48
0.89
0
0
1998
9/23
63
42
T
0
0
1999
9/23
79
41
0
0
0
2000
9/22
53
44
0.44
0
0
2001
9/22
74
49
0
0
0
2002
9/22
64
38
0
0
0
2003
9/23
79
38
0
0
0
2004
9/22
70
56
0.33
0
0
2005
9/22
70
46
0.01
0
0
2006
9/22
57
52
0.34
0
0
2007 9/23 89 62 0 0 0
2008 9/22 81 65 0.02 0 0
2009 9/22 63 52 T 0 0
2010 9/23 74 50 1.42 0 0
2011 9/23          
2012 9/22          


*SOG=Snow On Ground


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