S
M
T
W
T
F
S
26
65°
40°
27
67°
52°
28
63°
50°
29
56°
36°
30
56°
33°
1
49°
33°
2
55°
28°
3
64°
41°
4
79°
51°
5
59°
43°
6
54°
38°
7
56°
44°
8
63°
44°
9
67°
48°
10
65°
47°
11
61°
45°
12
62°
48°
13
67°
51°
14
64°
47°
15
68°
53°
16
72°
53°
17
71°
50°
18
67°
52°
19
72°
56°
20
71°
56°
21
70°
46°
22
66°
46°
23
66°
48°
24
67°
48°
25
67°
49°
26
68°
49°
27
67°
50°
28
69°
49°
29
69°
54°
30
71°
59°
31
74°
55°
1
71°
55°
2
75°
59°
3
77°
60°
4
79°
60°
5
79°
61°
6
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Munster
Munster's May 2026 forecast shows daily high temperatures ranging from 54° to 81°, with overnight lows between 38° and 62°. The average high for May is 69° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Munster. See also: June | July | August.