S
M
T
W
T
F
S
27
N/A
28
90°
71°
29
91°
69°
30
91°
70°
1
89°
73°
2
89°
74°
3
83°
74°
4
82°
76°
5
83°
74°
6
83°
72°
7
87°
71°
8
82°
73°
9
84°
67°
10
83°
59°
11
88°
64°
12
90°
64°
13
90°
66°
14
89°
66°
15
89°
67°
16
88°
65°
17
83°
62°
18
79°
59°
19
78°
61°
20
81°
62°
21
80°
58°
22
80°
62°
23
74°
57°
24
74°
60°
25
75°
61°
26
77°
60°
27
76°
58°
28
78°
59°
29
73°
58°
30
74°
61°
31
74°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Saint Charles
Saint Charles's October 2026 forecast shows daily high temperatures ranging from 73° to 90°, with overnight lows between 57° and 73°. The average high for October is 81° with an average low of 62°. 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 Saint Charles. See also: November | December | January.
