S
M
T
W
T
F
S
27
75°
60°
28
80°
52°
29
83°
49°
30
91°
64°
1
89°
67°
2
75°
49°
3
74°
46°
4
82°
44°
5
76°
44°
6
80°
42°
7
89°
48°
8
84°
47°
9
89°
47°
10
80°
49°
11
87°
47°
12
92°
56°
13
93°
61°
14
N/A
15
79°
52°
16
57°
41°
17
59°
37°
18
65°
38°
19
70°
42°
20
71°
46°
21
76°
50°
22
74°
48°
23
71°
50°
24
66°
49°
25
66°
45°
26
64°
46°
27
65°
47°
28
64°
41°
29
57°
42°
30
57°
40°
31
58°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Lake St. Louis
Lake St. Louis's October 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 37° and 52°. The average high for October is 66° with an average low of 44°. 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 Lake St. Louis. See also: November | December | January.
