S
M
T
W
T
F
S
27
74°
60°
28
80°
58°
29
84°
55°
30
92°
71°
1
90°
61°
2
69°
49°
3
73°
50°
4
76°
51°
5
72°
47°
6
73°
48°
7
80°
52°
8
80°
55°
9
84°
54°
10
76°
53°
11
75°
48°
12
73°
46°
13
71°
47°
14
70°
46°
15
63°
43°
16
71°
50°
17
73°
52°
18
73°
50°
19
65°
45°
20
61°
42°
21
59°
38°
22
60°
44°
23
71°
50°
24
71°
49°
25
70°
49°
26
66°
41°
27
60°
40°
28
65°
47°
29
64°
41°
30
63°
44°
31
68°
47°
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 59° to 90°, with overnight lows between 38° and 61°. The average high for October is 70° with an average low of 48°. 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.
