S
M
T
W
T
F
S
26
58°
42°
27
69°
45°
28
65°
51°
29
54°
36°
30
52°
32°
1
48°
30°
2
57°
28°
3
68°
45°
4
80°
43°
5
58°
40°
6
55°
31°
7
61°
29°
8
69°
29°
9
72°
44°
10
64°
31°
11
56°
35°
12
73°
34°
13
63°
36°
14
70°
33°
15
80°
47°
16
85°
59°
17
83°
56°
18
83°
67°
19
79°
53°
20
61°
45°
21
57°
42°
22
65°
54°
23
65°
52°
24
81°
53°
25
84°
57°
26
86°
59°
27
76°
54°
28
76°
53°
29
74°
50°
30
71°
53°
31
75°
56°
1
77°
59°
2
76°
57°
3
76°
56°
4
75°
53°
5
76°
52°
6
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in New Munster
New Munster's May 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 49° and 59°. The average high for May is 75° with an average low of 54°. 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 New Munster. See also: June | July | August.