S
M
T
W
T
F
S
26
86°
63°
27
79°
64°
28
88°
57°
29
99°
64°
30
102°
70°
31
93°
66°
1
82°
70°
2
91°
64°
3
99°
70°
4
99°
72°
5
93°
77°
6
84°
64°
7
82°
61°
8
91°
59°
9
95°
64°
10
97°
64°
11
86°
66°
12
93°
61°
13
97°
63°
14
99°
64°
15
100°
64°
16
93°
70°
17
77°
68°
18
N/A
19
79°
61°
20
77°
59°
21
74°
56°
22
74°
58°
23
71°
58°
24
73°
57°
25
73°
56°
26
75°
57°
27
74°
57°
28
70°
56°
29
71°
57°
30
72°
56°
31
78°
57°
1
74°
55°
2
71°
52°
3
76°
53°
4
77°
57°
5
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Heidelberg
Heidelberg's August 2026 forecast shows daily high temperatures ranging from 70° to 79°, with overnight lows between 52° and 61°. The average high for August is 74° with an average low of 56°. 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.
