S
M
T
W
T
F
S
30
89°
73°
31
90°
74°
1
89°
73°
2
90°
74°
3
90°
73°
4
89°
73°
5
89°
72°
6
90°
73°
7
89°
73°
8
89°
72°
9
90°
73°
10
88°
73°
11
89°
75°
12
90°
74°
13
90°
74°
14
89°
75°
15
90°
74°
16
91°
75°
17
90°
73°
18
90°
74°
19
89°
74°
20
90°
73°
21
90°
74°
22
89°
75°
23
91°
74°
24
90°
73°
25
89°
75°
26
89°
75°
27
90°
74°
28
91°
75°
29
90°
74°
30
90°
74°
1
89°
73°
2
89°
73°
3
90°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Notre Dame
Notre Dame's September 2026 forecast shows daily high temperatures ranging from 88° to 91°, with overnight lows between 72° and 75°. The average high for September is 90° with an average low of 74°. 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 Notre Dame. See also: October | November | December.
