S
M
T
W
T
F
S
29
46°
30°
30
52°
41°
31
52°
37°
1
54°
36°
2
59°
30°
3
57°
41°
4
63°
52°
5
68°
52°
6
61°
41°
7
68°
41°
8
70°
41°
9
70°
41°
10
57°
48°
11
70°
41°
12
59°
46°
13
52°
46°
14
61°
45°
15
66°
41°
16
68°
48°
17
75°
46°
18
75°
51°
19
62°
41°
20
57°
40°
21
58°
41°
22
64°
40°
23
67°
50°
24
68°
49°
25
63°
41°
26
59°
42°
27
61°
44°
28
66°
45°
29
67°
47°
30
68°
49°
1
65°
47°
2
58°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Heidelberg
Heidelberg's April 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 40° and 51°. The average high for April is 64° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Heidelberg. See also: May | June | July.
