S
M
T
W
T
F
S
27
76°
61°
28
82°
59°
29
84°
60°
30
77°
57°
1
83°
56°
2
73°
58°
3
73°
57°
4
80°
55°
5
70°
49°
6
69°
43°
7
68°
45°
8
68°
49°
9
69°
46°
10
68°
44°
11
64°
41°
12
63°
45°
13
65°
44°
14
69°
52°
15
73°
53°
16
72°
49°
17
73°
43°
18
67°
42°
19
63°
39°
20
62°
46°
21
65°
50°
22
69°
50°
23
68°
40°
24
64°
37°
25
60°
41°
26
59°
39°
27
58°
35°
28
57°
34°
29
55°
33°
30
56°
35°
31
57°
36°
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 55° to 84°, with overnight lows between 33° and 61°. The average high for October is 68° with an average low of 46°. 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.
