S
M
T
W
T
F
S
30
70°
50°
31
69°
46°
1
74°
42°
2
76°
46°
3
75°
46°
4
76°
48°
5
70°
48°
6
71°
47°
7
68°
40°
8
70°
43°
9
74°
48°
10
74°
49°
11
75°
39°
12
68°
41°
13
68°
45°
14
66°
44°
15
69°
35°
16
71°
36°
17
60°
34°
18
59°
33°
19
60°
35°
20
61°
41°
21
68°
34°
22
61°
34°
23
60°
32°
24
57°
31°
25
58°
31°
26
57°
32°
27
58°
32°
28
57°
37°
29
57°
33°
30
63°
39°
1
Hist. Avg.
62°
35°
2
Hist. Avg.
62°
35°
3
Hist. Avg.
62°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dunseith
Dunseith's September 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 31° and 50°. The average high for September is 66° with an average low of 40°. 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 Dunseith. See also: October | November | December.