S
M
T
W
T
F
S
29
58°
39°
30
71°
48°
31
64°
38°
1
45°
31°
2
65°
31°
3
56°
40°
4
53°
38°
5
43°
35°
6
46°
26°
7
37°
22°
8
65°
25°
9
61°
43°
10
49°
32°
11
56°
28°
12
69°
45°
13
72°
50°
14
74°
54°
15
64°
54°
16
57°
40°
17
76°
46°
18
52°
36°
19
45°
29°
20
52°
45°
21
60°
43°
22
57°
38°
23
56°
41°
24
55°
38°
25
52°
40°
26
52°
39°
27
53°
40°
28
55°
42°
29
54°
41°
30
58°
42°
1
58°
42°
2
54°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Grand Haven State Park
Grand Haven State Park's April 2026 forecast shows daily high temperatures ranging from 45° to 76°, with overnight lows between 29° and 46°. The average high for April is 56° with an average low of 40°. 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 Grand Haven State Park. See also: May | June | July.