S
M
T
W
T
F
S
30
82°
67°
31
86°
68°
1
92°
71°
2
94°
71°
3
90°
69°
4
86°
69°
5
84°
63°
6
81°
60°
7
77°
58°
8
76°
60°
9
79°
59°
10
76°
56°
11
74°
55°
12
76°
54°
13
75°
56°
14
78°
54°
15
79°
59°
16
79°
60°
17
78°
58°
18
78°
59°
19
79°
60°
20
80°
60°
21
80°
59°
22
79°
59°
23
80°
58°
24
79°
59°
25
79°
58°
26
78°
56°
27
79°
57°
28
78°
57°
29
77°
55°
30
76°
55°
1
76°
54°
2
75°
55°
3
76°
55°
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 74° to 94°, with overnight lows between 54° and 71°. The average high for September is 79° with an average low of 59°. 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.
