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