S
M
T
W
T
F
S
30
72°
55°
31
68°
55°
1
68°
55°
2
68°
61°
3
70°
64°
4
68°
57°
5
66°
52°
6
77°
57°
7
68°
56°
8
66°
51°
9
67°
52°
10
66°
58°
11
70°
51°
12
67°
60°
13
68°
58°
14
70°
56°
15
68°
52°
16
66°
52°
17
66°
55°
18
67°
55°
19
68°
54°
20
65°
53°
21
67°
53°
22
67°
52°
23
66°
53°
24
67°
51°
25
65°
48°
26
64°
50°
27
63°
46°
28
64°
47°
29
63°
49°
30
64°
50°
1
63°
46°
2
64°
50°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Penarth
Penarth's September 2026 forecast shows daily high temperatures ranging from 63° to 70°, with overnight lows between 46° and 60°. The average high for September is 66° with an average low of 52°. 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 Penarth. See also: October | November | December.
