S
M
T
W
T
F
S
26
57°
16°
27
47°
24°
28
53°
28°
29
58°
32°
30
57°
28°
1
69°
38°
2
66°
36°
3
60°
36°
4
52°
33°
5
50°
32°
6
60°
34°
7
57°
35°
8
58°
36°
9
60°
39°
10
65°
38°
11
57°
40°
12
58°
35°
13
58°
34°
14
61°
44°
15
70°
45°
16
72°
47°
17
73°
46°
18
66°
42°
19
66°
47°
20
65°
47°
21
70°
49°
22
73°
49°
23
74°
48°
24
68°
46°
25
69°
49°
26
74°
51°
27
76°
52°
28
76°
50°
29
68°
49°
30
72°
52°
31
76°
54°
1
76°
53°
2
75°
51°
3
69°
52°
4
68°
52°
5
69°
53°
6
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glen Ullin
Glen Ullin's May 2026 forecast shows daily high temperatures ranging from 47° to 76°, with overnight lows between 24° and 54°. The average high for May is 65° with an average low of 43°. 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 Glen Ullin. See also: June | July | August.
