S
M
T
W
T
F
S
30
78°
62°
31
78°
63°
1
77°
62°
2
79°
62°
3
79°
64°
4
77°
62°
5
78°
58°
6
78°
54°
7
72°
54°
8
71°
55°
9
72°
57°
10
75°
60°
11
77°
57°
12
77°
58°
13
75°
61°
14
77°
61°
15
77°
57°
16
74°
58°
17
76°
59°
18
77°
60°
19
77°
58°
20
76°
55°
21
74°
59°
22
71°
59°
23
69°
55°
24
72°
59°
25
72°
56°
26
74°
53°
27
71°
54°
28
71°
56°
29
72°
53°
30
70°
56°
1
71°
62°
2
77°
60°
3
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ventura
Ventura's September 2026 forecast shows daily high temperatures ranging from 69° to 79°, with overnight lows between 53° and 64°. The average high for September is 75° 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 September weather will actually feel in Ventura. See also: October | November | December.