S
M
T
W
T
F
S
30
77°
54°
31
81°
55°
1
80°
47°
2
77°
46°
3
71°
49°
4
73°
51°
5
75°
55°
6
77°
48°
7
77°
45°
8
71°
47°
9
71°
53°
10
70°
53°
11
76°
51°
12
73°
48°
13
69°
49°
14
67°
45°
15
68°
43°
16
67°
42°
17
67°
47°
18
68°
43°
19
68°
48°
20
67°
51°
21
72°
48°
22
71°
40°
23
65°
45°
24
64°
49°
25
68°
41°
26
63°
43°
27
68°
46°
28
Hist. Avg.
65°
47°
29
Hist. Avg.
65°
47°
30
Hist. Avg.
64°
46°
1
Hist. Avg.
64°
46°
2
Hist. Avg.
63°
46°
3
Hist. Avg.
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Wales
Wales's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 40° and 55°. The average high for September is 71° with an average low of 48°. 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.
