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
66°
54°
10
70°
57°
11
70°
61°
12
73°
57°
13
73°
64°
14
77°
64°
15
73°
61°
16
68°
57°
17
70°
57°
18
N/A
19
70°
57°
20
68°
51°
21
73°
56°
22
75°
59°
23
72°
54°
24
70°
58°
25
73°
57°
26
72°
60°
27
71°
58°
28
69°
55°
29
70°
58°
30
71°
56°
1
68°
54°
2
66°
47°
3
62°
42°
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 75°, with overnight lows between 42° and 60°. The average high for September is 70° with an average low of 55°. 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.
