S
M
T
W
T
F
S
26
85°
65°
27
85°
66°
28
86°
65°
29
85°
66°
30
85°
66°
31
84°
65°
1
86°
66°
2
86°
65°
3
85°
64°
4
82°
62°
5
83°
64°
6
84°
66°
7
84°
65°
8
82°
64°
9
81°
63°
10
77°
55°
11
77°
57°
12
80°
57°
13
79°
56°
14
76°
54°
15
76°
55°
16
77°
54°
17
76°
59°
18
76°
55°
19
77°
58°
20
77°
58°
21
75°
56°
22
75°
55°
23
76°
58°
24
75°
58°
25
74°
61°
26
80°
53°
27
73°
53°
28
73°
54°
29
74°
58°
30
79°
57°
31
80°
59°
1
79°
59°
2
79°
58°
3
78°
59°
4
79°
54°
5
72°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Heidelberg
Heidelberg's August 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 53° and 66°. The average high for August is 79° with an average low of 59°. 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 Heidelberg. See also: September | October | November.
