S
M
T
W
T
F
S
27
88°
69°
28
82°
64°
29
84°
60°
30
82°
64°
1
89°
64°
2
101°
73°
3
102°
73°
4
100°
72°
5
102°
72°
6
102°
69°
7
102°
68°
8
104°
67°
9
102°
68°
10
96°
66°
11
99°
68°
12
96°
67°
13
93°
65°
14
83°
57°
15
85°
59°
16
86°
62°
17
85°
62°
18
87°
61°
19
87°
62°
20
86°
61°
21
85°
61°
22
81°
60°
23
78°
60°
24
81°
59°
25
84°
59°
26
84°
58°
27
83°
60°
28
84°
60°
29
81°
59°
30
79°
59°
31
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Lake Forest
Lake Forest's October 2026 forecast shows daily high temperatures ranging from 78° to 104°, with overnight lows between 57° and 73°. The average high for October is 90° with an average low of 64°. 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 Forest. See also: November | December | January.
