S
M
T
W
T
F
S
26
52°
37°
27
45°
39°
28
54°
36°
29
48°
25°
30
48°
25°
1
55°
25°
2
66°
27°
3
70°
34°
4
61°
37°
5
N/A
6
44°
33°
7
55°
34°
8
63°
41°
9
56°
34°
10
51°
34°
11
61°
42°
12
66°
45°
13
71°
44°
14
63°
42°
15
64°
41°
16
63°
41°
17
65°
42°
18
67°
43°
19
68°
44°
20
62°
39°
21
63°
40°
22
62°
40°
23
63°
43°
24
63°
48°
25
66°
50°
26
67°
47°
27
71°
50°
28
72°
52°
29
75°
52°
30
75°
53°
31
74°
52°
1
70°
50°
2
75°
54°
3
76°
54°
4
77°
49°
5
66°
46°
6
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Garrison
Garrison's May 2026 forecast shows daily high temperatures ranging from 44° to 77°, with overnight lows between 33° and 54°. The average high for May is 66° 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 May weather will actually feel in Garrison. See also: June | July | August.