S
M
T
W
T
F
S
30
79°
55°
31
79°
53°
1
75°
48°
2
76°
54°
3
82°
50°
4
75°
46°
5
75°
47°
6
74°
50°
7
77°
41°
8
71°
40°
9
65°
39°
10
65°
38°
11
66°
41°
12
66°
39°
13
65°
36°
14
62°
34°
15
61°
35°
16
62°
35°
17
63°
34°
18
61°
37°
19
62°
40°
20
66°
38°
21
70°
43°
22
70°
45°
23
74°
35°
24
64°
43°
25
60°
35°
26
60°
33°
27
58°
42°
28
58°
40°
29
59°
39°
30
60°
38°
1
59°
33°
2
57°
37°
3
56°
33°
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 56° to 82°, with overnight lows between 33° and 55°. The average high for September is 67° with an average low of 41°. 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.
