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
N/A
15
87°
67°
16
74°
68°
17
76°
64°
18
80°
63°
19
85°
64°
20
78°
59°
21
74°
55°
22
70°
57°
23
72°
57°
24
73°
55°
25
73°
55°
26
72°
56°
27
77°
58°
28
76°
58°
29
74°
58°
30
74°
57°
1
75°
56°
2
75°
55°
3
73°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Munster
Munster's September 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 55° and 68°. The average high for September is 76° with an average low of 59°. 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.
