S
M
T
W
T
F
S
26
55°
37°
27
53°
35°
28
54°
35°
29
54°
33°
30
55°
32°
1
55°
31°
2
53°
31°
3
54°
34°
4
53°
33°
5
54°
33°
6
56°
35°
7
56°
36°
8
58°
37°
9
58°
35°
10
57°
36°
11
57°
36°
12
58°
37°
13
61°
39°
14
60°
39°
15
59°
42°
16
60°
44°
17
61°
40°
18
61°
38°
19
64°
47°
20
71°
49°
21
70°
44°
22
63°
40°
23
63°
41°
24
65°
43°
25
69°
47°
26
74°
50°
27
75°
50°
28
76°
42°
29
71°
45°
30
75°
49°
31
67°
51°
1
71°
47°
2
68°
44°
3
69°
41°
4
66°
46°
5
69°
51°
6
75°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Adirondack
Adirondack's May 2026 forecast shows daily high temperatures ranging from 53° to 76°, with overnight lows between 31° and 53°. The average high for May is 62° with an average low of 41°. 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 Adirondack. See also: June | July | August.