S
M
T
W
T
F
S
26
71°
55°
27
68°
56°
28
69°
49°
29
68°
49°
30
69°
50°
31
70°
49°
1
71°
52°
2
73°
54°
3
74°
57°
4
75°
55°
5
75°
57°
6
74°
57°
7
73°
58°
8
74°
57°
9
69°
55°
10
68°
50°
11
69°
55°
12
72°
58°
13
75°
54°
14
69°
50°
15
67°
51°
16
67°
48°
17
68°
51°
18
69°
56°
19
70°
56°
20
69°
53°
21
71°
53°
22
67°
54°
23
66°
52°
24
67°
55°
25
65°
57°
26
72°
55°
27
71°
56°
28
71°
52°
29
66°
51°
30
64°
54°
31
70°
56°
1
71°
56°
2
72°
51°
3
71°
45°
4
63°
45°
5
62°
46°
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 62° to 75°, with overnight lows between 45° and 58°. The average high for August is 70° with an average low of 53°. 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.
