S
M
T
W
T
F
S
26
87°
70°
27
88°
70°
28
87°
69°
29
88°
70°
30
87°
69°
31
86°
68°
1
80°
65°
2
79°
64°
3
80°
68°
4
82°
68°
5
83°
67°
6
86°
68°
7
87°
68°
8
87°
67°
9
86°
69°
10
86°
68°
11
85°
68°
12
87°
67°
13
86°
69°
14
89°
60°
15
86°
61°
16
81°
63°
17
82°
64°
18
86°
62°
19
85°
60°
20
80°
57°
21
78°
58°
22
78°
59°
23
79°
59°
24
79°
58°
25
80°
63°
26
78°
61°
27
85°
59°
28
85°
58°
29
78°
57°
30
76°
57°
31
77°
58°
1
76°
57°
2
76°
56°
3
77°
56°
4
77°
57°
5
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Munster
Munster's August 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 56° and 70°. The average high for August is 82° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Munster. See also: September | October | November.