S
M
T
W
T
F
S
30
65°
53°
31
63°
52°
1
64°
49°
2
63°
50°
3
62°
49°
4
61°
49°
5
62°
52°
6
64°
53°
7
64°
52°
8
65°
52°
9
65°
51°
10
64°
52°
11
64°
51°
12
60°
51°
13
61°
50°
14
62°
50°
15
63°
50°
16
63°
49°
17
62°
46°
18
61°
45°
19
59°
46°
20
59°
45°
21
58°
48°
22
58°
50°
23
62°
49°
24
63°
48°
25
59°
44°
26
59°
44°
27
60°
46°
28
59°
44°
29
60°
45°
30
60°
43°
1
56°
42°
2
56°
41°
3
55°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort William
Fort William's September 2026 forecast shows daily high temperatures ranging from 55° to 65°, with overnight lows between 41° and 53°. The average high for September is 61° 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 Fort William. See also: October | November | December.
