S
M
T
W
T
F
S
30
71°
60°
31
69°
56°
1
69°
54°
2
71°
60°
3
72°
66°
4
66°
59°
5
66°
45°
6
75°
57°
7
66°
61°
8
64°
55°
9
64°
46°
10
64°
52°
11
66°
49°
12
65°
60°
13
69°
60°
14
68°
58°
15
64°
50°
16
62°
56°
17
63°
53°
18
62°
55°
19
64°
53°
20
64°
53°
21
63°
54°
22
63°
53°
23
64°
55°
24
63°
51°
25
59°
51°
26
58°
50°
27
62°
52°
28
61°
48°
29
57°
46°
30
57°
47°
1
58°
51°
2
60°
50°
3
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gwaun-Cae-Gurwen
Gwaun-Cae-Gurwen's September 2026 forecast shows daily high temperatures ranging from 57° to 69°, with overnight lows between 46° and 60°. The average high for September is 62° 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 Gwaun-Cae-Gurwen. See also: October | November | December.
