S
M
T
W
T
F
S
27
88°
62°
28
80°
56°
29
88°
59°
30
88°
60°
1
87°
57°
2
100°
62°
3
101°
69°
4
98°
68°
5
99°
67°
6
98°
71°
7
97°
69°
8
93°
67°
9
88°
57°
10
82°
60°
11
71°
55°
12
66°
49°
13
75°
46°
14
82°
52°
15
87°
65°
16
90°
77°
17
87°
68°
18
88°
61°
19
86°
58°
20
80°
56°
21
68°
55°
22
64°
54°
23
70°
51°
24
78°
54°
25
79°
50°
26
80°
51°
27
N/A
28
75°
54°
29
74°
56°
30
70°
56°
31
68°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Simi Valley
Simi Valley's October 2026 forecast shows daily high temperatures ranging from 68° to 75°, with overnight lows between 54° and 56°. The average high for October is 72° with an average low of 56°. 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 Simi Valley. See also: November | December | January.
