S
M
T
W
T
F
S
30
73°
54°
31
72°
53°
1
72°
54°
2
71°
53°
3
72°
51°
4
71°
48°
5
66°
48°
6
68°
52°
7
69°
50°
8
70°
52°
9
69°
51°
10
69°
48°
11
68°
47°
12
69°
48°
13
69°
49°
14
67°
49°
15
66°
45°
16
66°
44°
17
64°
43°
18
64°
46°
19
65°
47°
20
64°
46°
21
63°
44°
22
64°
45°
23
64°
46°
24
63°
47°
25
62°
47°
26
65°
48°
27
67°
50°
28
66°
49°
29
Hist. Avg.
62°
49°
30
Hist. Avg.
61°
49°
1
Hist. Avg.
61°
49°
2
Hist. Avg.
61°
48°
3
Hist. Avg.
61°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in London
London's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 43° and 54°. 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.
