S
M
T
W
T
F
S
30
68°
55°
31
66°
52°
1
66°
52°
2
63°
55°
3
66°
54°
4
63°
54°
5
63°
50°
6
70°
50°
7
64°
54°
8
59°
52°
9
66°
50°
10
66°
56°
11
66°
51°
12
68°
60°
13
68°
55°
14
70°
60°
15
67°
52°
16
63°
49°
17
64°
50°
18
65°
51°
19
68°
52°
20
66°
52°
21
64°
51°
22
66°
53°
23
66°
52°
24
64°
51°
25
61°
50°
26
60°
49°
27
62°
51°
28
63°
46°
29
58°
45°
30
58°
48°
1
59°
49°
2
62°
50°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Swillington
Swillington's September 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 45° and 60°. The average high for September is 64° with an average low of 51°. 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 Swillington. See also: October | November | December.