S
M
T
W
T
F
S
29
64°
30°
30
54°
27°
31
39°
28°
1
36°
25°
2
30°
27°
3
36°
16°
4
34°
25°
5
43°
24°
6
34°
16°
7
37°
5°
8
45°
34°
9
37°
30°
10
52°
21°
11
46°
21°
12
81°
45°
13
61°
43°
14
59°
36°
15
66°
37°
16
75°
32°
17
61°
30°
18
41°
23°
19
40°
24°
20
58°
35°
21
66°
39°
22
75°
55°
23
67°
40°
24
54°
30°
25
50°
29°
26
50°
32°
27
51°
30°
28
50°
32°
29
51°
32°
30
52°
33°
1
56°
36°
2
62°
36°
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 40° to 75°, with overnight lows between 24° and 55°. The average high for April is 56° with an average low of 35°. 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.