S
M
T
W
T
F
S
30
87°
75°
31
87°
80°
1
90°
70°
2
90°
79°
3
91°
77°
4
91°
79°
5
89°
78°
6
91°
79°
7
92°
80°
8
91°
79°
9
90°
79°
10
89°
77°
11
90°
78°
12
92°
78°
13
90°
77°
14
91°
78°
15
88°
79°
16
87°
78°
17
88°
78°
18
86°
79°
19
86°
78°
20
88°
79°
21
87°
79°
22
86°
78°
23
87°
79°
24
86°
79°
25
86°
78°
26
87°
79°
27
86°
79°
28
86°
78°
29
86°
79°
30
86°
78°
1
86°
79°
2
86°
79°
3
87°
78°
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 86° to 92°, with overnight lows between 77° and 80°. The average high for September is 88° with an average low of 78°. 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.
