S
M
T
W
T
F
S
30
82°
67°
31
86°
68°
1
91°
74°
2
95°
72°
3
92°
69°
4
86°
69°
5
84°
63°
6
81°
60°
7
80°
63°
8
78°
64°
9
83°
65°
10
80°
61°
11
75°
60°
12
76°
57°
13
75°
59°
14
76°
57°
15
75°
54°
16
79°
60°
17
78°
58°
18
74°
58°
19
79°
59°
20
78°
59°
21
76°
58°
22
74°
57°
23
73°
52°
24
73°
55°
25
77°
57°
26
77°
53°
27
67°
49°
28
66°
47°
29
65°
48°
30
65°
45°
1
64°
44°
2
65°
48°
3
70°
52°
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 64° to 95°, with overnight lows between 44° and 72°. The average high for September is 76° with an average low of 57°. 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.
