S
M
T
W
T
F
S
27
91°
66°
28
92°
64°
29
91°
62°
30
89°
58°
1
87°
60°
2
82°
58°
3
80°
55°
4
81°
54°
5
81°
54°
6
80°
58°
7
82°
57°
8
85°
61°
9
87°
58°
10
88°
55°
11
82°
55°
12
80°
52°
13
77°
53°
14
78°
55°
15
81°
59°
16
83°
60°
17
85°
59°
18
86°
60°
19
86°
61°
20
85°
61°
21
86°
63°
22
87°
60°
23
87°
57°
24
80°
56°
25
79°
57°
26
80°
59°
27
76°
58°
28
79°
59°
29
83°
57°
30
76°
52°
31
80°
52°
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 76° to 92°, with overnight lows between 52° and 66°. The average high for October is 83° with an average low of 58°. 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.
