S
M
T
W
T
F
S
28
82°
52°
29
75°
52°
30
N/A
1
84°
54°
2
85°
60°
3
82°
61°
4
86°
58°
5
90°
59°
6
87°
61°
7
85°
62°
8
86°
59°
9
84°
58°
10
84°
59°
11
85°
61°
12
86°
57°
13
87°
59°
14
83°
56°
15
80°
60°
16
81°
59°
17
84°
60°
18
85°
60°
19
82°
61°
20
87°
61°
21
88°
62°
22
85°
61°
23
86°
62°
24
83°
61°
25
79°
61°
26
82°
60°
27
85°
62°
28
83°
60°
29
82°
60°
30
79°
60°
31
78°
56°
1
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Glen Ullin
Glen Ullin's July 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 54° and 62°. The average high for July is 84° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Glen Ullin. See also: August | September | October.