S
M
T
W
T
F
S
30
82°
67°
31
91°
70°
1
97°
74°
2
95°
71°
3
92°
73°
4
92°
73°
5
84°
72°
6
79°
66°
7
82°
60°
8
85°
60°
9
79°
66°
10
76°
57°
11
82°
53°
12
88°
63°
13
74°
51°
14
72°
47°
15
90°
64°
16
76°
67°
17
77°
65°
18
74°
63°
19
82°
64°
20
69°
62°
21
67°
59°
22
70°
55°
23
72°
57°
24
70°
58°
25
73°
54°
26
75°
55°
27
73°
56°
28
74°
57°
29
71°
50°
30
74°
57°
1
75°
56°
2
67°
55°
3
65°
55°
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 65° to 82°, with overnight lows between 50° and 67°. The average high for September is 72° with an average low of 58°. 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.
