S
M
T
W
T
F
S
31
95°
65°
1
91°
61°
2
79°
64°
3
81°
58°
4
73°
57°
5
74°
60°
6
73°
61°
7
79°
60°
8
75°
60°
9
74°
64°
10
74°
60°
11
74°
62°
12
77°
60°
13
73°
58°
14
80°
59°
15
88°
59°
16
90°
64°
17
89°
60°
18
78°
65°
19
79°
59°
20
78°
60°
21
76°
59°
22
91°
61°
23
96°
65°
24
72°
63°
25
78°
64°
26
82°
57°
27
69°
59°
28
66°
60°
29
69°
61°
30
74°
62°
1
71°
61°
2
68°
61°
3
70°
57°
4
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Benicia
Benicia's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Benicia. See also: October | November | December.