S
M
T
W
T
F
S
30
76°
50°
31
68°
44°
1
71°
47°
2
73°
48°
3
72°
49°
4
74°
49°
5
75°
47°
6
73°
40°
7
64°
39°
8
63°
38°
9
62°
39°
10
62°
38°
11
63°
38°
12
66°
42°
13
68°
40°
14
64°
37°
15
60°
36°
16
60°
35°
17
61°
35°
18
60°
36°
19
61°
41°
20
67°
43°
21
69°
43°
22
67°
34°
23
59°
39°
24
58°
38°
25
56°
40°
26
60°
42°
27
64°
41°
28
60°
38°
29
55°
35°
30
55°
38°
1
54°
39°
2
60°
29°
3
54°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rosyth
Rosyth's September 2026 forecast shows daily high temperatures ranging from 54° to 76°, with overnight lows between 28° and 50°. The average high for September is 64° 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 Rosyth. See also: October | November | December.