S
M
T
W
T
F
S
27
61°
55°
28
73°
59°
29
70°
55°
30
70°
64°
1
68°
50°
2
63°
41°
3
70°
48°
4
68°
48°
5
70°
43°
6
79°
55°
7
72°
44°
8
66°
48°
9
71°
61°
10
82°
58°
11
79°
54°
12
61°
44°
13
53°
41°
14
56°
50°
15
59°
42°
16
53°
40°
17
55°
41°
18
58°
42°
19
56°
43°
20
58°
35°
21
58°
39°
22
61°
41°
23
49°
34°
24
58°
41°
25
60°
38°
26
54°
38°
27
56°
30°
28
46°
29°
29
51°
38°
30
55°
33°
31
56°
39°
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 46° to 82°, with overnight lows between 29° and 61°. The average high for October is 59° 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 October weather will actually feel in St. Charles. See also: November | December | January.
