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
85°
55°
20
79°
58°
21
71°
56°
22
69°
52°
23
79°
54°
24
82°
56°
25
85°
55°
26
82°
56°
27
80°
55°
28
78°
53°
29
79°
54°
30
78°
53°
31
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Simi Valley
Simi Valley's October 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 52° and 58°. The average high for October is 79° with an average low of 55°. 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.
