S
M
T
W
T
F
S
29
58°
35°
30
73°
42°
31
51°
42°
1
38°
28°
2
61°
31°
3
62°
38°
4
54°
36°
5
41°
34°
6
46°
25°
7
36°
22°
8
55°
47°
9
65°
40°
10
53°
30°
11
54°
41°
12
70°
59°
13
72°
57°
14
68°
44°
15
62°
43°
16
60°
41°
17
69°
43°
18
64°
43°
19
60°
42°
20
68°
48°
21
66°
36°
22
52°
32°
23
53°
38°
24
53°
43°
25
65°
40°
26
54°
37°
27
54°
36°
28
58°
38°
29
62°
44°
30
65°
46°
1
68°
45°
2
59°
43°
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 52° to 72°, with overnight lows between 30° and 59°. The average high for April is 61° with an average low of 42°. 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.
