S
M
T
W
T
F
S
30
73°
63°
31
72°
59°
1
72°
57°
2
70°
63°
3
79°
66°
4
70°
59°
5
73°
55°
6
81°
59°
7
77°
64°
8
64°
57°
9
69°
54°
10
70°
61°
11
74°
55°
12
75°
63°
13
75°
58°
14
76°
61°
15
74°
54°
16
68°
52°
17
69°
54°
18
71°
56°
19
73°
55°
20
72°
54°
21
71°
55°
22
69°
50°
23
69°
50°
24
68°
49°
25
67°
47°
26
65°
47°
27
66°
50°
28
66°
44°
29
60°
42°
30
60°
43°
1
61°
47°
2
63°
49°
3
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Swanley
Swanley's September 2026 forecast shows daily high temperatures ranging from 60° to 76°, with overnight lows between 42° and 63°. The average high for September is 69° 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 Swanley. See also: October | November | December.
