S
M
T
W
T
F
S
30
64°
50°
31
64°
52°
1
65°
52°
2
64°
51°
3
65°
51°
4
63°
49°
5
63°
49°
6
66°
51°
7
64°
53°
8
65°
53°
9
66°
50°
10
65°
52°
11
62°
53°
12
65°
52°
13
66°
49°
14
63°
48°
15
61°
49°
16
63°
53°
17
65°
50°
18
65°
50°
19
62°
52°
20
63°
49°
21
64°
52°
22
64°
52°
23
62°
50°
24
63°
51°
25
61°
51°
26
64°
50°
27
62°
50°
28
63°
47°
29
62°
48°
30
60°
50°
1
61°
50°
2
Hist. Avg.
57°
46°
3
Hist. Avg.
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rostrevor
Rostrevor's September 2026 forecast shows daily high temperatures ranging from 60° to 66°, with overnight lows between 47° and 53°. The average high for September is 63° with an average low of 51°. 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 Rostrevor. See also: October | November | December.
