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