S
M
T
W
T
F
S
29
68°
36°
30
77°
43°
31
57°
37°
1
46°
32°
2
37°
32°
3
39°
34°
4
39°
34°
5
54°
32°
6
41°
27°
7
41°
21°
8
68°
37°
9
51°
32°
10
53°
36°
11
52°
49°
12
73°
55°
13
76°
56°
14
67°
47°
15
61°
41°
16
69°
44°
17
62°
39°
18
60°
44°
19
63°
47°
20
62°
44°
21
62°
44°
22
59°
36°
23
54°
40°
24
53°
38°
25
52°
36°
26
53°
32°
27
55°
41°
28
55°
44°
29
64°
47°
30
68°
45°
1
56°
42°
2
56°
41°
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 51° to 76°, with overnight lows between 32° and 56°. The average high for April is 60° with an average low of 43°. 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.
