S
M
T
W
T
F
S
30
78°
50°
31
81°
49°
1
85°
48°
2
91°
54°
3
91°
63°
4
99°
58°
5
92°
60°
6
95°
67°
7
85°
52°
8
77°
51°
9
81°
49°
10
89°
48°
11
69°
43°
12
66°
40°
13
76°
43°
14
66°
52°
15
67°
48°
16
73°
46°
17
81°
44°
18
80°
57°
19
64°
58°
20
59°
53°
21
66°
53°
22
72°
51°
23
70°
54°
24
84°
48°
25
80°
55°
26
72°
46°
27
63°
51°
28
67°
45°
29
74°
44°
30
74°
45°
1
69°
46°
2
68°
41°
3
56°
37°
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 56° to 80°, with overnight lows between 37° and 55°. The average high for September is 69° with an average low of 46°. 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.
