S
M
T
W
T
F
S
30
84°
68°
31
84°
63°
1
82°
54°
2
84°
61°
3
90°
68°
4
84°
64°
5
84°
64°
6
79°
68°
7
79°
68°
8
86°
61°
9
75°
54°
10
82°
50°
11
82°
59°
12
68°
48°
13
66°
45°
14
61°
46°
15
68°
50°
16
70°
48°
17
70°
52°
18
63°
59°
19
64°
54°
20
67°
49°
21
63°
46°
22
66°
47°
23
65°
56°
24
67°
56°
25
69°
58°
26
68°
56°
27
68°
51°
28
66°
49°
29
66°
48°
30
69°
49°
1
68°
52°
2
63°
41°
3
62°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rothsay
Rothsay's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 41° and 58°. The average high for September is 66° with an average low of 50°. 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 Rothsay. See also: October | November | December.