S
M
T
W
T
F
S
26
67°
47°
27
56°
44°
28
57°
40°
29
52°
38°
30
44°
32°
1
50°
27°
2
61°
29°
3
69°
46°
4
63°
38°
5
46°
34°
6
43°
30°
7
54°
33°
8
65°
29°
9
58°
35°
10
55°
32°
11
59°
26°
12
71°
42°
13
65°
39°
14
71°
32°
15
82°
52°
16
76°
48°
17
55°
45°
18
70°
53°
19
63°
44°
20
59°
42°
21
64°
38°
22
66°
47°
23
65°
52°
24
77°
39°
25
83°
50°
26
88°
58°
27
84°
52°
28
79°
51°
29
83°
59°
30
76°
50°
31
77°
51°
1
82°
51°
2
83°
53°
3
83°
54°
4
80°
55°
5
77°
51°
6
73°
53°
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 73° to 83°, with overnight lows between 50° and 59°. The average high for May is 79° with an average low of 53°. 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.