S
M
T
W
T
F
S
30
63°
49°
31
63°
53°
1
69°
50°
2
70°
48°
3
66°
48°
4
62°
50°
5
63°
48°
6
67°
47°
7
62°
49°
8
61°
47°
9
64°
47°
10
61°
46°
11
60°
45°
12
63°
44°
13
62°
48°
14
60°
49°
15
61°
48°
16
Hist. Avg.
59°
43°
17
Hist. Avg.
59°
43°
18
Hist. Avg.
59°
43°
19
Hist. Avg.
58°
43°
20
Hist. Avg.
58°
42°
21
Hist. Avg.
57°
42°
22
Hist. Avg.
57°
42°
23
Hist. Avg.
57°
42°
24
Hist. Avg.
56°
41°
25
Hist. Avg.
56°
41°
26
Hist. Avg.
56°
41°
27
Hist. Avg.
55°
41°
28
Hist. Avg.
55°
40°
29
Hist. Avg.
55°
40°
30
Hist. Avg.
54°
40°
1
Hist. Avg.
54°
40°
2
Hist. Avg.
53°
39°
3
Hist. Avg.
53°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Southern Bay
Southern Bay's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 44° and 53°. The average high for September is 63° with an average low of 48°. 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 Southern Bay. See also: October | November | December.
