S
M
T
W
T
F
S
30
68°
45°
31
69°
46°
1
68°
48°
2
68°
49°
3
71°
44°
4
69°
46°
5
68°
50°
6
66°
51°
7
65°
44°
8
67°
47°
9
72°
43°
10
72°
43°
11
69°
50°
12
71°
46°
13
65°
41°
14
64°
50°
15
69°
51°
16
71°
49°
17
70°
45°
18
65°
42°
19
60°
39°
20
58°
40°
21
57°
43°
22
59°
39°
23
59°
40°
24
58°
39°
25
59°
39°
26
58°
38°
27
58°
41°
28
57°
40°
29
55°
38°
30
55°
43°
1
54°
34°
2
53°
33°
3
Hist. Avg.
59°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wales
Wales's September 2026 forecast shows daily high temperatures ranging from 53° to 72°, with overnight lows between 33° and 51°. The average high for September is 64° with an average low of 43°. 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 Wales. See also: October | November | December.
