S
M
T
W
T
F
S
30
62°
47°
31
63°
46°
1
61°
49°
2
61°
48°
3
62°
45°
4
62°
44°
5
61°
45°
6
63°
46°
7
64°
47°
8
65°
50°
9
64°
48°
10
60°
50°
11
62°
49°
12
61°
49°
13
64°
50°
14
63°
49°
15
63°
48°
16
60°
46°
17
58°
46°
18
59°
44°
19
58°
42°
20
59°
43°
21
58°
42°
22
58°
44°
23
59°
42°
24
58°
46°
25
57°
47°
26
57°
47°
27
60°
44°
28
58°
44°
29
56°
42°
30
56°
42°
1
57°
41°
2
56°
41°
3
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Langholm
Langholm's September 2026 forecast shows daily high temperatures ranging from 56° to 65°, with overnight lows between 41° and 50°. The average high for September is 60° 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 Langholm. See also: October | November | December.