S
M
T
W
T
F
S
30
61°
51°
31
60°
52°
1
63°
51°
2
63°
51°
3
62°
48°
4
63°
48°
5
63°
51°
6
62°
52°
7
62°
52°
8
61°
51°
9
62°
51°
10
62°
50°
11
61°
50°
12
61°
49°
13
60°
48°
14
58°
47°
15
57°
48°
16
58°
49°
17
59°
47°
18
60°
49°
19
58°
47°
20
59°
49°
21
60°
48°
22
60°
48°
23
56°
47°
24
57°
48°
25
59°
44°
26
58°
44°
27
56°
43°
28
55°
47°
29
58°
43°
30
57°
47°
1
56°
46°
2
58°
45°
3
55°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Augustus
Fort Augustus's September 2026 forecast shows daily high temperatures ranging from 55° to 63°, with overnight lows between 43° and 52°. The average high for September is 59° 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 Augustus. See also: October | November | December.
