S
M
T
W
T
F
S
29
60°
22°
30
55°
32°
31
50°
31°
1
48°
34°
2
36°
23°
3
39°
24°
4
52°
23°
5
60°
17°
6
61°
22°
7
63°
21°
8
59°
31°
9
62°
23°
10
65°
20°
11
54°
29°
12
54°
31°
13
43°
28°
14
47°
28°
15
39°
32°
16
36°
10°
17
33°
14°
18
43°
19°
19
55°
25°
20
62°
29°
21
65°
35°
22
53°
31°
23
41°
26°
24
49°
23°
25
51°
25°
26
53°
28°
27
52°
31°
28
55°
31°
29
56°
33°
30
54°
27°
1
46°
22°
2
48°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Harriman State Park
Harriman State Park's April 2026 forecast shows daily high temperatures ranging from 33° to 65°, with overnight lows between 14° and 35°. The average high for April is 51° with an average low of 27°. 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 Harriman State Park. See also: May | June | July.