S
M
T
W
T
F
S
29
72°
30°
30
69°
39°
31
64°
42°
1
57°
41°
2
49°
32°
3
47°
30°
4
58°
27°
5
64°
28°
6
70°
31°
7
64°
34°
8
64°
30°
9
66°
35°
10
66°
34°
11
60°
32°
12
51°
33°
13
45°
31°
14
54°
30°
15
60°
34°
16
55°
34°
17
55°
35°
18
55°
36°
19
56°
34°
20
55°
29°
21
47°
24°
22
48°
27°
23
49°
29°
24
50°
30°
25
54°
30°
26
52°
27°
27
57°
29°
28
61°
32°
29
60°
34°
30
60°
33°
1
61°
34°
2
62°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. Charles
St. Charles's April 2026 forecast shows daily high temperatures ranging from 45° to 66°, with overnight lows between 24° and 36°. The average high for April is 56° with an average low of 32°. 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 St. Charles. See also: May | June | July.
