S
M
T
W
T
F
S
26
79°
53°
27
82°
47°
28
79°
54°
29
73°
51°
30
64°
40°
1
71°
35°
2
57°
37°
3
64°
32°
4
78°
41°
5
80°
47°
6
65°
48°
7
57°
43°
8
72°
38°
9
73°
44°
10
80°
46°
11
69°
44°
12
76°
39°
13
76°
45°
14
56°
42°
15
72°
37°
16
82°
47°
17
89°
60°
18
93°
58°
19
91°
62°
20
90°
63°
21
75°
65°
22
68°
60°
23
78°
59°
24
79°
67°
25
75°
66°
26
76°
65°
27
80°
65°
28
79°
62°
29
74°
57°
30
67°
49°
31
68°
52°
1
73°
54°
2
75°
57°
3
73°
57°
4
74°
58°
5
75°
56°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gary
Gary's May 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 49° and 67°. The average high for May is 75° with an average low of 59°. 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 Gary. See also: June | July | August.
