S
M
T
W
T
F
S
26
57°
16°
27
46°
28°
28
52°
18°
29
55°
21°
30
52°
19°
1
63°
19°
2
72°
43°
3
75°
25°
4
50°
23°
5
45°
25°
6
54°
16°
7
64°
16°
8
72°
34°
9
63°
32°
10
66°
32°
11
84°
45°
12
73°
37°
13
81°
36°
14
75°
50°
15
72°
41°
16
64°
34°
17
48°
39°
18
46°
39°
19
57°
37°
20
70°
44°
21
68°
51°
22
57°
44°
23
70°
47°
24
81°
53°
25
85°
57°
26
87°
56°
27
78°
55°
28
74°
51°
29
77°
52°
30
76°
52°
31
76°
55°
1
82°
55°
2
72°
47°
3
75°
52°
4
66°
49°
5
67°
49°
6
66°
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 57° to 87°, with overnight lows between 44° and 57°. The average high for May is 74° with an average low of 51°. 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.
