S
M
T
W
T
F
S
30
69°
47°
31
68°
48°
1
71°
49°
2
71°
52°
3
72°
52°
4
70°
47°
5
68°
46°
6
66°
48°
7
69°
50°
8
71°
47°
9
71°
52°
10
70°
51°
11
71°
52°
12
71°
48°
13
68°
44°
14
65°
50°
15
64°
49°
16
65°
51°
17
65°
51°
18
69°
50°
19
68°
50°
20
68°
49°
21
69°
46°
22
68°
44°
23
63°
43°
24
63°
43°
25
64°
45°
26
63°
44°
27
64°
45°
28
61°
49°
29
65°
48°
30
66°
47°
1
65°
48°
2
66°
47°
3
60°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in London
London's September 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 40° and 52°. The average high for September is 67° with an average low of 48°. 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 London. See also: October | November | December.
