Climate Statistics for the First Day of Autumn

The astronomical Fall season begins this Sunday, September 22 at 344 pm CDT.  At this time, the most direct rays of the sun will cross the equator and work toward Southern Hemisphere summer, while our hemisphere slides toward the depths of winter.  Next March, we will be ready to welcome the direct sunlight back to our hemisphere.

Normals for the start of Autumn are listed in this following table.

 

 

First Day of Autumn Normals

 

30-year (1981-2010) Daily Normals

 

 
 

Location

 

Max.

Min.

Precip.

 

Max.

Min.

Precip.

 

 

Sioux Falls

 

71

46

0.06

 

71

46

0.09

 

 

Huron

 

71

46

0.05

 

72

46

0.08

 

 

Sioux City

 

73

49

0.09

 

74

48

0.10

 

 

 

 

 

 

 

 

 

 

 

 

 

Here are some of the climate extremes for this first day of Autumn. The last couple years have ranked as some of the coolest starts to Fall, but this year looks to be fairly close to normal readings.

Sioux Falls

             
                     

Coldest Minimum Temp.

 

 

Warmest Max. Temp.

 

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1983

9/23

66

28

0

 

1935

9/23

92

66

0

2011

9/23

67

30

0

 

2007

9/23

89

62

0

1895

9/23

69

31

0

 

1938

9/23

88

55

0

1896

9/22

63

31

0

 

1898

9/22

87

53

0

2012

9/22

60

32

0

 

1919

9/23

86

42

0

1928

9/23

57

32

0

 

1908

9/23

85

48

0

1893

9/22

72

33

0

 

1911

9/23

85

59

0

1916

9/23

76

33

0

 

1917

9/23

85

52

0

1949

9/23

68

33

0

 

1937

9/23

85

70

0.27

1971

9/23

71

33

0

 

1940

9/22

85

63

0

1990

9/23

64

33

0

           
                     

Warmest Minimum Temp.

 

Coldest Maximum Temp.

 

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1937

9/23

85

70

0.27

 

1965

9/23

43

35

0

1930

9/23

83

69

0

 

1942

9/23

49

34

T

1929

9/23

80

68

0

 

1946

9/23

50

38

0.01

1958

9/23

82

68

T

 

1951

9/23

51

38

1.01

1935

9/23

92

66

0

 

1961

9/23

51

41

0.02

2008

9/22

81

65

0.02

 

1997

9/22

53

48

0.89

1940

9/22

85

63

0

 

2000

9/22

53

44

0.44

1968

9/22

78

63

0.99

 

1928

9/23

57

32

0

2007

9/23

89

62

0

 

1991

9/23

57

34

0.68

1920

9/23

77

60

0.39

 

2006

9/22

57

52

0.34

1936

9/23

82

60

0

           
                     

Wettest

 

 

 

           

Year

Date

Max

Min

Precip

           

1951

9/23

51

38

1.01

           

1968

9/22

78

63

0.99

           

1997

9/22

53

48

0.89

           

2010

9/22

69

49

0.73

           

1913

9/23

69

40

0.70

           

1991

9/23

57

34

0.68

           
                     

Sioux City

             
                     

Coldest Minimum Temp.

 

 

Warmest Max. Temp.

 

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

2011

9/23

70

29

0

 

1938

9/23

95

52

0

1983

9/23

65

31

0

 

1935

9/23

92

68

T

2012

9/22

64

32

0

 

1891

9/23

90

66

0

1971

9/23

72

32

0

 

1921

9/23

90

56

0

1896

9/22

66

34

0

 

2007

9/23

88

55

0

1965

9/23

54

34

0

 

1940

9/22

87

65

0

1991

9/23

66

34

0.09

 

1999

9/23

87

42

0

1916

9/23

71

35

0.09

 

1908

9/23

86

59

0

1942

9/23

57

35

0.01

 

1892

9/22

86

53

T

1990

9/23

65

35

0

           
                     

Warmest Minimum Temp.

 

Coldest Maximum Temp.

 

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1930

9/23

85

70

0

 

1961

9/23

52

40

T

1935

9/23

92

68

T

 

1965

9/23

54

34

0

1958

9/23

78

68

T

 

1951

9/23

55

43

0.24

1891

9/22

90

66

0

 

1942

9/23

57

35

0.01

1968

9/22

82

66

1.48

 

1944

9/22

57

48

0.08

1940

9/22

87

65

0

 

1946

9/23

57

38

T

1929

9/23

85

64

0

 

1997

9/22

57

50

1.08

2008

9/22

81

64

0.76

 

2000

9/22

58

50

0.88

2004

9/22

83

63

0.16

 

1910

9/23

60

50

0.03

1915

9/23

73

62

T

 

1928

9/23

60

39

0

           

1970

9/23

60

48

0.47

                     
                     

Wettest

 

 

 

           

Year

Date

Max

Min

Precip

           

1937

9/23

84

59

2.18

           

1968

9/22

82

66

1.48

           

1997

9/22

57

50

1.08

           

1920

9/23

77

58

0.92

           

1963

9/23

69

54

0.90

           

2000

9/22

58

50

0.88

           

2008

9/22

81

64

0.76

           
                     

Huron

                 
                     

Coldest Minimum Temp.

 

 

Warmest Max. Temp.

 

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1887

9/23

59

26

T

 

1935

9/23

93

60

0

1942

9/23

49

28

0.03

 

1937

9/23

92

50

0.20

2012

9/22

60

29

0

 

2007

9/23

91

61

0

1990

9/23

67

29

0

 

1892

9/22

91

45

0

1895

9/23

69

30

0

 

1938

9/23

90

54

0

1928

9/23

59

30

0

 

1940

9/22

90

64

0

1989

9/22

55

30

0

 

1886

9/22

89

49

T

1951

9/23

50

31

0.12

 

1905

9/23

88

46

0

1893

9/22

66

32

0

 

1930

9/23

88

65

T

1896

9/22

66

32

0

 

1958

9/23

88

69

0

1916

9/23

74

32

0

 

1904

9/23

87

58

0.01

1971

9/23

71

32

0

           

1991

9/23

53

32

0.64

           
                     

Warmest Minimum Temp.

 

Coldest Maximum Temp.

 

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1958

9/23

88

69

0

 

1965

9/23

42

34

0.01

1891

9/23

85

67

T

 

1942

9/23

49

28

0.03

1930

9/23

88

65

T

 

1951

9/23

50

31

0.12

1940

9/22

90

64

0

 

1960

9/22

50

41

0.26

2008

9/22

78

64

T

 

1991

9/23

53

32

0.64

2007

9/23

91

61

0

 

1946

9/23

54

40

0.02

1935

9/23

93

60

0

 

1910

9/23

55

45

0

1917

9/23

85

59

0

 

1989

9/22

55

30

0

1920

9/23

77

59

1.17

 

1944

9/22

55

46

0.12

1904

9/23

87

58

0.01

 

1961

9/23

55

39

0.03

           

1997

9/22

55

51

0.60

                     

Wettest

 

 

 

 

Snowiest

 

 

 

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Snowfall

1920

9/23

77

59

1.17

 

1965

9/23

42

34

T

2004

9/22

60

51

0.71

 

1942

9/23

49

28

T

1991

9/23

53

32

0.64

           

1997

9/22

55

51

0.60

           

2006

9/22

56

51

0.50

           

1968

9/22

70

54

0.33

           

1889

9/22

78

53

0.32

           



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