South Dakota April 1921 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
46.0
44.7
1.3
83
47
1920
1915
1920
1915
normal
1962,1964
2
40.8
37.8
3.0
104
26
1899
2012
1920
1911
top-third
1999,2017
3
36.5
31.8
4.7
114
16
1899
2012
1920
1921
top-third
4
33.4
27.6
5.8
119
11
1936
2012
1920
1921
top-tenth
5
30.9
26.0
4.9
118
11
1936
2012
1920
1921
top-tenth
6
30.7
27.0
3.7
114
15
1936
2012
1920
1921
top-third
7
33.6
30.0
3.6
117
12
1899
2012
1920
1921
top-tenth
8
37.1
33.7
3.4
117
12
1899
2012
1920
1921
top-tenth
9
40.6
37.8
2.8
114
15
1899
2012
1920
1921
top-third
1934,1942,1998
10
43.6
41.3
2.3
107
22
1899
2012
1920
1921
top-third
1976
11
45.5
43.5
2.0
105
24
1899
2012
1920
1921
top-third
1976,2003
12
46.3
44.6
1.7
102
27
1899
2012
1920
1921
top-third
1989
18
38.7
38.7
0.0
61
67
1979
2000,2006
1920
1915
normal
1961,1967,1998
24
44.5
44.6
-0.1
59
69
1917
2000
1920
1915
normal
1963,1985
36
44.6
44.5
0.1
66
61
1918
2000
1920
1903
normal
1903,1961,1974,2010
48
44.1
44.5
-0.4
37
89
1899
2007
1920
1911
bottom-third
1949,1979
60
43.5
44.5
-1.0
13
112
1920
2006
1920
1915
bottom-third
1906,1908