S
M
T
W
T
F
S
27
81°
59°
28
82°
60°
29
82°
60°
30
81°
59°
1
81°
60°
2
80°
59°
3
80°
59°
4
79°
58°
5
80°
59°
6
79°
58°
7
77°
54°
8
68°
50°
9
77°
53°
10
77°
43°
11
68°
45°
12
62°
50°
13
65°
46°
14
64°
43°
15
64°
46°
16
68°
49°
17
73°
50°
18
73°
51°
19
72°
52°
20
75°
51°
21
75°
53°
22
74°
53°
23
75°
52°
24
73°
52°
25
72°
49°
26
72°
42°
27
70°
38°
28
62°
36°
29
56°
34°
30
53°
34°
31
53°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in St. Charles
St. Charles's October 2026 forecast shows daily high temperatures ranging from 53° to 82°, with overnight lows between 34° and 60°. The average high for October is 72° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in St. Charles. See also: November | December | January.
