S
M
T
W
T
F
S
30
96°
70°
31
96°
70°
1
95°
69°
2
95°
69°
3
94°
68°
4
94°
69°
5
93°
68°
6
94°
69°
7
93°
68°
8
92°
67°
9
92°
66°
10
91°
67°
11
93°
67°
12
94°
68°
13
95°
67°
14
94°
67°
15
Hist. Avg.
89°
62°
16
Hist. Avg.
89°
61°
17
Hist. Avg.
88°
61°
18
Hist. Avg.
88°
60°
19
Hist. Avg.
88°
60°
20
Hist. Avg.
87°
60°
21
Hist. Avg.
87°
59°
22
Hist. Avg.
87°
59°
23
Hist. Avg.
86°
58°
24
Hist. Avg.
86°
58°
25
Hist. Avg.
85°
58°
26
Hist. Avg.
85°
57°
27
Hist. Avg.
85°
57°
28
Hist. Avg.
84°
56°
29
Hist. Avg.
84°
56°
30
Hist. Avg.
84°
56°
1
Hist. Avg.
83°
55°
2
Hist. Avg.
83°
55°
3
Hist. Avg.
83°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in South Bend
South Bend's September 2026 forecast shows daily high temperatures ranging from 91° to 96°, with overnight lows between 66° and 70°. The average high for September is 94° with an average low of 68°. 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.
