S
M
T
W
T
F
S
30
75°
55°
31
75°
60°
1
76°
63°
2
81°
62°
3
76°
53°
4
74°
53°
5
72°
54°
6
72°
55°
7
76°
58°
8
79°
58°
9
80°
60°
10
81°
54°
11
74°
55°
12
73°
58°
13
73°
51°
14
72°
52°
15
69°
51°
16
71°
50°
17
72°
56°
18
75°
48°
19
71°
49°
20
72°
48°
21
74°
49°
22
71°
55°
23
76°
56°
24
78°
56°
25
75°
55°
26
77°
56°
27
76°
56°
28
78°
53°
29
75°
53°
30
74°
55°
1
75°
54°
2
77°
45°
3
74°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Bend
South Bend's September 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 42° and 63°. The average high for September is 75° with an average low of 54°. 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 South Bend. See also: October | November | December.
