S
M
T
W
T
F
S
26
74°
42°
27
65°
57°
28
62°
51°
29
60°
41°
30
63°
37°
1
54°
39°
2
56°
36°
3
68°
43°
4
78°
51°
5
57°
48°
6
58°
39°
7
63°
36°
8
64°
51°
9
76°
51°
10
67°
46°
11
66°
44°
12
82°
43°
13
67°
43°
14
71°
37°
15
74°
51°
16
82°
64°
17
85°
64°
18
82°
64°
19
79°
60°
20
68°
48°
21
71°
45°
22
74°
55°
23
80°
58°
24
80°
62°
25
84°
56°
26
84°
59°
27
90°
59°
28
84°
54°
29
82°
56°
30
80°
52°
31
78°
56°
1
81°
54°
2
82°
52°
3
83°
55°
4
81°
60°
5
80°
58°
6
81°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gilman
Gilman's May 2026 forecast shows daily high temperatures ranging from 78° to 84°, with overnight lows between 52° and 60°. The average high for May is 81° with an average low of 56°. 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 Gilman. See also: June | July | August.