S
M
T
W
T
F
S
30
88°
60°
31
85°
59°
1
84°
60°
2
87°
58°
3
81°
58°
4
78°
57°
5
83°
59°
6
84°
56°
7
71°
53°
8
76°
55°
9
78°
53°
10
82°
56°
11
77°
54°
12
77°
50°
13
67°
42°
14
69°
51°
15
79°
54°
16
80°
50°
17
74°
51°
18
80°
38°
19
73°
40°
20
63°
39°
21
65°
48°
22
73°
52°
23
78°
50°
24
79°
50°
25
76°
43°
26
75°
37°
27
65°
35°
28
59°
32°
29
58°
32°
30
57°
35°
1
60°
45°
2
70°
47°
3
73°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glendive
Glendive's September 2026 forecast shows daily high temperatures ranging from 57° to 88°, with overnight lows between 32° and 60°. The average high for September is 74° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Glendive. See also: October | November | December.
