S
M
T
W
T
F
S
27
73°
45°
28
74°
44°
29
78°
48°
30
67°
59°
1
70°
60°
2
65°
48°
3
69°
42°
4
72°
49°
5
70°
45°
6
72°
50°
7
76°
48°
8
68°
44°
9
70°
50°
10
74°
56°
11
75°
55°
12
71°
50°
13
63°
53°
14
67°
49°
15
62°
45°
16
62°
45°
17
58°
44°
18
62°
41°
19
59°
41°
20
58°
45°
21
54°
44°
22
58°
42°
23
61°
40°
24
52°
37°
25
51°
36°
26
51°
37°
27
52°
36°
28
58°
45°
29
62°
45°
30
60°
46°
31
62°
43°
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 51° to 76°, with overnight lows between 36° and 56°. The average high for October is 63° with an average low of 45°. 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.
