S
M
T
W
T
F
S
30
68°
56°
31
74°
56°
1
70°
55°
2
68°
55°
3
73°
56°
4
69°
56°
5
73°
54°
6
68°
55°
7
68°
54°
8
71°
53°
9
70°
53°
10
74°
52°
11
72°
53°
12
74°
52°
13
71°
52°
14
70°
48°
15
61°
43°
16
62°
44°
17
64°
50°
18
66°
50°
19
67°
49°
20
69°
51°
21
70°
46°
22
71°
46°
23
68°
44°
24
69°
34°
25
70°
45°
26
64°
44°
27
68°
40°
28
62°
44°
29
68°
33°
30
67°
34°
1
54°
43°
2
65°
42°
3
66°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Langdon
Langdon's September 2026 forecast shows daily high temperatures ranging from 54° to 74°, with overnight lows between 33° and 56°. The average high for September is 68° 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 Langdon. See also: October | November | December.