S
M
T
W
T
F
S
29
72°
35°
30
74°
35°
31
49°
29°
1
37°
25°
2
34°
30°
3
33°
29°
4
40°
29°
5
60°
25°
6
36°
18°
7
43°
17°
8
56°
29°
9
42°
20°
10
56°
21°
11
61°
41°
12
63°
53°
13
65°
42°
14
63°
39°
15
72°
35°
16
84°
38°
17
65°
29°
18
46°
22°
19
46°
30°
20
74°
25°
21
78°
31°
22
87°
53°
23
79°
41°
24
57°
31°
25
43°
37°
26
46°
38°
27
47°
38°
28
51°
30°
29
56°
30°
30
52°
32°
1
52°
27°
2
68°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sioux Falls Junction
Sioux Falls Junction's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Sioux Falls Junction. See also: May | June | July.