S
M
T
W
T
F
S
31
69°
63°
1
67°
57°
2
78°
55°
3
73°
53°
4
73°
47°
5
68°
50°
6
69°
45°
7
77°
46°
8
75°
55°
9
77°
61°
10
83°
60°
11
88°
62°
12
91°
72°
13
95°
65°
14
89°
66°
15
89°
64°
16
91°
67°
17
77°
64°
18
75°
61°
19
73°
57°
20
79°
61°
21
80°
56°
22
88°
61°
23
72°
63°
24
79°
58°
25
82°
55°
26
85°
55°
27
81°
56°
28
86°
51°
29
87°
57°
30
82°
59°
1
84°
58°
2
89°
61°
3
89°
62°
4
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Bend
South Bend'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 South Bend. See also: October | November | December.
