S
M
T
W
T
F
S
29
71°
38°
30
84°
57°
31
81°
61°
1
64°
48°
2
74°
59°
3
79°
53°
4
59°
39°
5
57°
40°
6
59°
36°
7
54°
40°
8
65°
51°
9
67°
47°
10
70°
54°
11
68°
54°
12
67°
50°
13
65°
45°
14
64°
46°
15
66°
44°
16
72°
44°
17
61°
48°
18
66°
49°
19
71°
51°
20
73°
53°
21
73°
54°
22
74°
54°
23
73°
53°
24
74°
55°
25
74°
52°
26
64°
43°
27
60°
43°
28
62°
47°
29
62°
45°
30
64°
44°
1
65°
50°
2
66°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Upper Alton
Upper Alton's April 2026 forecast shows daily high temperatures ranging from 54° to 79°, with overnight lows between 36° and 59°. The average high for April is 67° with an average low of 48°. 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 Upper Alton. See also: May | June | July.
