S
M
T
W
T
F
S
26
79°
52°
27
79°
41°
28
81°
43°
29
77°
50°
30
73°
52°
1
73°
50°
2
72°
50°
3
79°
54°
4
81°
50°
5
75°
52°
6
73°
45°
7
81°
37°
8
88°
46°
9
91°
54°
10
91°
57°
11
90°
59°
12
95°
54°
13
95°
59°
14
90°
55°
15
88°
59°
16
88°
52°
17
86°
52°
18
84°
55°
19
90°
50°
20
86°
55°
21
86°
54°
22
86°
52°
23
86°
54°
24
90°
57°
25
82°
59°
26
84°
55°
27
89°
55°
28
89°
57°
29
90°
54°
30
89°
55°
31
93°
57°
1
98°
56°
2
95°
58°
3
93°
55°
4
90°
54°
5
95°
54°
6
96°
53°
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 89° to 98°, with overnight lows between 53° and 58°. The average high for May is 92° with an average low of 55°. 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.
