S
M
T
W
T
F
S
26
86°
63°
27
79°
64°
28
88°
57°
29
101°
69°
30
101°
67°
31
89°
68°
1
84°
64°
2
90°
70°
3
93°
70°
4
88°
68°
5
89°
66°
6
86°
63°
7
81°
61°
8
79°
60°
9
81°
60°
10
82°
61°
11
81°
61°
12
81°
61°
13
80°
60°
14
82°
62°
15
82°
63°
16
81°
63°
17
83°
62°
18
83°
63°
19
80°
63°
20
80°
62°
21
81°
62°
22
78°
59°
23
74°
56°
24
79°
61°
25
79°
59°
26
80°
61°
27
81°
62°
28
81°
61°
29
78°
60°
30
78°
58°
31
73°
54°
1
77°
55°
2
70°
54°
3
71°
56°
4
71°
53°
5
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mannheim
Mannheim's August 2026 forecast shows daily high temperatures ranging from 70° to 101°, with overnight lows between 51° and 70°. The average high for August is 81° with an average low of 61°. 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 Mannheim. See also: September | October | November.