S
M
T
W
T
F
S
29
55°
25°
30
72°
45°
31
79°
61°
1
72°
43°
2
43°
39°
3
68°
39°
4
64°
41°
5
54°
39°
6
50°
37°
7
51°
28°
8
54°
29°
9
55°
34°
10
70°
48°
11
63°
37°
12
62°
48°
13
72°
61°
14
82°
62°
15
75°
48°
16
63°
44°
17
59°
48°
18
65°
50°
19
67°
45°
20
61°
42°
21
67°
48°
22
66°
49°
23
66°
49°
24
68°
48°
25
69°
42°
26
59°
43°
27
58°
42°
28
61°
42°
29
60°
41°
30
59°
41°
1
61°
44°
2
62°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Garrison
Garrison's April 2026 forecast shows daily high temperatures ranging from 51° to 82°, with overnight lows between 28° and 62°. The average high for April is 64° with an average low of 44°. 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 Garrison. See also: May | June | July.