S
M
T
W
T
F
S
30
76°
57°
31
77°
58°
1
76°
57°
2
76°
56°
3
77°
56°
4
77°
57°
5
78°
60°
6
77°
59°
7
75°
59°
8
76°
56°
9
74°
54°
10
75°
53°
11
74°
53°
12
74°
54°
13
75°
54°
14
73°
58°
15
79°
61°
16
80°
61°
17
79°
60°
18
79°
51°
19
78°
50°
20
71°
51°
21
70°
57°
22
71°
58°
23
77°
57°
24
76°
58°
25
77°
48°
26
75°
46°
27
67°
47°
28
66°
46°
29
67°
47°
30
67°
46°
1
Hist. Avg.
69°
48°
2
Hist. Avg.
69°
47°
3
Hist. Avg.
68°
47°
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 66° to 80°, with overnight lows between 46° and 61°. The average high for September is 75° with an average low of 55°. 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.
