S
M
T
W
T
F
S
26
61°
48°
27
64°
46°
28
61°
44°
29
59°
44°
30
59°
44°
1
60°
43°
2
59°
42°
3
61°
49°
4
61°
49°
5
64°
44°
6
60°
43°
7
60°
43°
8
63°
47°
9
70°
53°
10
67°
52°
11
67°
51°
12
72°
54°
13
71°
51°
14
65°
48°
15
71°
52°
16
72°
54°
17
71°
50°
18
69°
48°
19
72°
54°
20
71°
55°
21
69°
49°
22
68°
48°
23
65°
50°
24
72°
56°
25
68°
49°
26
67°
49°
27
73°
53°
28
75°
58°
29
76°
60°
30
76°
59°
31
77°
59°
1
73°
58°
2
73°
57°
3
75°
50°
4
69°
49°
5
69°
52°
6
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mannheim
Mannheim's May 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 42° and 60°. The average high for May is 68° with an average low of 50°. 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 Mannheim. See also: June | July | August.