Climate Statistics for the Vernal Equinox

 

 

The official and long-awaited start to (astronomical) Spring is set for 621 pm CDT on Sunday.  Here is a look at what an "average" start to Spring might bring, as well as the more extreme conditions experienced over the period of record.

 

Climatological Normals for the First Day of Spring (March 20)
 

30-year Normals

Period of Record Normals for 1st Day of Spring

Location

Maximum

Minimum

Precipitation

Maximum

 Minimum

Precipitation

Sioux Falls, SD

 46

 23

 0.07

45

24

0.03

Huron, SD

 45

 24

 0.06

43

23

0.02

Sioux City, IA

 49

 27

 0.07

48

26

0.04

Sioux Falls              
                     
Coldest Minimum Temp.     Warmest Maximum Temp.

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1951

3/21

26

-11

0

 

1910

3/21

83

40

0

1965

3/20

18

-2

T

 

1907

3/21

75

40

0

1899

3/20

14

-1

0.03

 

1911

3/21

75

39

0

1913

3/20

22

0

T

 

1939

3/21

74

40

0

1974

3/20

27

5

0.16

 

1990

3/20

68

32

0

1986

3/20

28

5

T

 

1916

3/20

65

30

0

1893

3/20

42

6

0

 

1935

3/21

65

33

0

1960

3/20

30

6

0

 

1938

3/21

65

49

0

1927

3/21

37

7

0

 

1953

3/20

65

41

0.03

1955

3/21

24

7

0.02

 

1987

3/20

63

45

0.13

1957

3/20

45

7

0

 

 

 

 

 

 

2002

3/20

36

7

T

 

 

 

 

 

 
                     
Warmest Minimum Temp.   Coldest Maximum Temp.  

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1938

3/21

65

49

0

 

1899

3/20

14

-1

0.03

1987

3/20

63

45

0.13

 

1965

3/20

18

-2

T

1918

3/21

60

41

0

 

1913

3/20

22

0

T

1953

3/20

65

41

0.03

 

1955

3/21

24

7

0.02

1910

3/21

83

40

0

 

1933

3/20

25

8

0

1907

3/21

75

40

0

 

1951

3/21

26

-11

0

1939

3/21

74

40

0

 

1932

3/20

27

20

0.60

1991

3/20

61

40

0.19

 

1974

3/20

27

5

0.16

1911

3/21

75

39

0

 

1983

3/20

28

20

T

1972

3/20

54

39

0.07

 

1986

3/20

28

5

T

                     
Wettest         Snowiest      

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Snowfall

1923

3/21

46

26

0.77

 

1923

3/21

46

26

6.5

1932

3/20

27

20

0.60

 

1932

3/20

27

20

5.0

1921

3/20

60

33

0.54

 

1974

3/20

27

5

1.9

1912

3/20

32

12

0.23

 

1950

3/20

33

25

1.1

1991

3/20

61

40

0.19

 

1964

3/20

32

12

1.1

1974

3/20

27

5

0.16

 

1977

3/20

32

16

0.8

1964

3/20

32

12

0.16

 

1940

3/20

34

20

0.5

 

 

 

 

 

 

1994

3/20

44

31

0.5

                     
Sioux City              
                     
Coldest Minimum Temp.     Warmest Maximum Temp.

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1951

3/21

29

-1

0

 

1910

3/21

85

47

0

1965

3/20

20

4

T

 

1907

3/21

81

41

0

1892

3/19

26

5

0

 

1939

3/21

81

41

0

1899

3/20

24

5

T

 

1911

3/21

72

47

T

1913

3/20

20

6

0.02

 

1938

3/21

71

47

T

1974

3/20

33

7

0.28

 

1987

3/20

69

45

0.47

1900

3/20

27

8

0

 

1988

3/20

69

25

0

1896

3/19

37

11

0

 

1990

3/20

69

26

0

1914

3/21

26

11

0.01

 

1997

3/20

69

33

0

1912

3/20

27

11

1.39

 

 

 

 

 

 

1960

3/20

30

11

0

 

 

 

 

 

 
                     
Warmest Minimum Temp.   Coldest Maximum Temp.  

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1910

3/21

85

47

0

 

1913

3/20

20

6

0.02

1911

3/21

72

47

T

 

1965

3/20

20

4

T

1938

3/21

71

47

T

 

1955

3/21

23

12

0.04

1972

3/20

67

47

0.05

 

1899

3/20

24

5

T

1987

3/20

69

45

0.47

 

1933

3/20

25

12

T

1894

3/20

49

43

0.04

 

1892

3/19

26

5

0

1953

3/20

64

42

T

 

1914

3/21

26

11

0.01

1991

3/20

63

42

0.18

 

1900

3/20

27

8

0

1907

3/21

81

41

0

 

1912

3/20

27

11

1.39

1939

3/21

81

41

0

 

1932

3/20

28

22

0.25

                     
                     
Wettest         Snowiest (SINCE 1948)  

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Snowfall

1912

3/20

27

11

1.39

 

2006

3/20

35

28

7.5

2006

3/20

35

28

0.62

 

1974

3/20

33

7

3.7

1987

3/20

69

45

0.47

 

1964

3/20

33

13

3.4

1964

3/20

33

13

0.36

 

1961

3/20

38

33

0.5

1974

3/20

33

7

0.28

 

1955

3/21

23

12

0.4

1932

3/20

28

22

0.25

 

1969

3/20

34

22

0.4

2003

3/20

49

35

0.24

 

1983

3/20

32

24

0.3

1991

3/20

63

42

0.18

 

 

 

 

 

 
                     
Huron                  
                     
Coldest Minimum Temp.     Warmest Maximum Temp.

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1965

3/20

21

-5

T

 

1907

3/21

84

40

0

1951

3/21

28

-4

0

 

1910

3/21

83

45

0

1892

3/19

19

-3

0

 

1939

3/21

76

30

0

1913

3/20

11

-2

0.04

 

1990

3/20

69

31

0.01

1899

3/20

12

0

0.03

 

1911

3/21

67

35

0

1900

3/20

28

2

0

 

2009

3/20

66

32

T

1912

3/20

13

3

0.21

 

1953

3/20

66

40

0

1943

3/21

39

3

0

 

1916

3/20

63

34

0

1960

3/20

26

4

0

 

1929

3/20

63

28

0

2002

3/20

23

4

T

 

1946

3/20

63

37

0

 

 

 

 

 

 

1987

3/20

63

44

0.02

                     
Warmest Minimum Temp.   Coldest Maximum Temp.  

Year

 Date

Max

Min

Precip

 

Year

Date

Max

Min

Precip

1910

3/21

83

45

0

 

1913

3/20

11

-2

0.04

1926

3/21

62

45

0

 

1899

3/20

12

0

0.03

1938

3/21

59

45

0

 

1912

3/20

13

3

0.21

1987

3/20

63

44

0.02

 

1892

3/19

19

-3

0

1991

3/20

48

43

0.14

 

1965

3/20

21

-5

T

1907

3/21

84

40

0

 

1955

3/21

23

7

T

1953

3/20

66

40

0

 

2002

3/20

23

4

T

1894

3/20

44

38

0.10

 

1989

3/20

24

5

T

1946

3/20

63

37

0

 

1932

3/20

25

23

0.03

1972

3/20

42

36

0.48

 

1914

3/21

26

7

T

 

 

 

 

 

 

1960

3/20

26

4

0

                     
Wettest         Snowiest      

Year

Date

Max

Min

Precip

 

Year

Date

Max

Min

Snowfall

1972

3/20

42

36

0.48

 

1982

3/20

31

26

4.3

1887

3/20

31

20

0.29

 

1977

3/20

33

13

2.4

1882

3/20

42

10

0.26

 

1912

3/20

13

3

1.5

1912

3/20

13

3

0.21

 

1940

3/20

27

14

1.2

1977

3/20

33

13

0.17

 

1932

3/20

25

23

0.7

1991

3/20

48

43

0.14

 

1964

3/20

30

5

0.6

1982

3/20

31

26

0.13

 

1913

3/20

11

-2

0.5

1994

3/20

54

29

0.11

 

1924

3/20

36

28

0.5

1894

3/20

44

38

0.10

 

1950

3/20

31

25

0.5



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