S
M
T
W
T
F
S
30
80°
61°
31
80°
60°
1
79°
59°
2
78°
56°
3
76°
56°
4
74°
58°
5
71°
50°
6
70°
58°
7
70°
58°
8
75°
57°
9
77°
59°
10
68°
53°
11
67°
55°
12
68°
55°
13
72°
59°
14
76°
58°
15
77°
53°
16
68°
49°
17
66°
54°
18
71°
53°
19
74°
52°
20
Hist. Avg.
69°
52°
21
Hist. Avg.
69°
52°
22
Hist. Avg.
68°
51°
23
Hist. Avg.
68°
51°
24
Hist. Avg.
68°
51°
25
Hist. Avg.
67°
51°
26
Hist. Avg.
67°
50°
27
Hist. Avg.
67°
50°
28
Hist. Avg.
66°
50°
29
Hist. Avg.
66°
50°
30
Hist. Avg.
66°
49°
1
Hist. Avg.
65°
49°
2
Hist. Avg.
65°
49°
3
Hist. Avg.
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Interbay
Interbay's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 49° and 61°. The average high for September is 73° 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 September weather will actually feel in Interbay. See also: October | November | December.
