S
M
T
W
T
F
S
30
73°
51°
31
72°
49°
1
69°
50°
2
69°
52°
3
70°
53°
4
71°
49°
5
67°
49°
6
69°
52°
7
Hist. Avg.
67°
53°
8
Hist. Avg.
67°
53°
9
Hist. Avg.
66°
53°
10
Hist. Avg.
66°
53°
11
Hist. Avg.
66°
53°
12
Hist. Avg.
66°
52°
13
Hist. Avg.
65°
52°
14
Hist. Avg.
65°
52°
15
Hist. Avg.
65°
52°
16
Hist. Avg.
64°
52°
17
Hist. Avg.
64°
51°
18
Hist. Avg.
64°
51°
19
Hist. Avg.
64°
51°
20
Hist. Avg.
64°
51°
21
Hist. Avg.
63°
51°
22
Hist. Avg.
63°
50°
23
Hist. Avg.
63°
50°
24
Hist. Avg.
63°
50°
25
Hist. Avg.
62°
50°
26
Hist. Avg.
62°
50°
27
Hist. Avg.
62°
49°
28
Hist. Avg.
62°
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 67° to 73°, with overnight lows between 49° and 53°. The average high for September is 70° 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 London. See also: October | November | December.
