S
M
T
W
T
F
S
30
68°
59°
31
72°
55°
1
70°
48°
2
72°
46°
3
72°
59°
4
72°
59°
5
66°
50°
6
69°
50°
7
78°
60°
8
70°
54°
9
65°
49°
10
65°
49°
11
64°
52°
12
63°
47°
13
65°
48°
14
64°
48°
15
65°
51°
16
64°
51°
17
65°
48°
18
64°
50°
19
67°
51°
20
65°
53°
21
64°
53°
22
66°
54°
23
66°
53°
24
67°
53°
25
67°
51°
26
62°
50°
27
61°
47°
28
59°
44°
29
60°
45°
30
58°
51°
1
61°
49°
2
61°
46°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Munster
Munster's September 2026 forecast shows daily high temperatures ranging from 58° to 78°, with overnight lows between 44° and 60°. The average high for September is 65° with an average low of 50°. 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 Munster. See also: October | November | December.
