S
M
T
W
T
F
S
30
81°
47°
31
81°
48°
1
82°
46°
2
80°
44°
3
80°
46°
4
81°
42°
5
77°
42°
6
79°
43°
7
80°
42°
8
80°
41°
9
78°
39°
10
77°
45°
11
79°
44°
12
83°
42°
13
84°
38°
14
75°
37°
15
74°
36°
16
75°
37°
17
75°
37°
18
81°
39°
19
82°
39°
20
82°
40°
21
81°
41°
22
82°
45°
23
83°
46°
24
82°
44°
25
80°
43°
26
76°
36°
27
71°
41°
28
74°
42°
29
73°
41°
30
71°
40°
1
70°
41°
2
70°
40°
3
73°
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 70° to 84°, with overnight lows between 33° and 48°. The average high for September is 78° 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.
