S
M
T
W
T
F
S
30
70°
49°
31
73°
50°
1
72°
52°
2
72°
52°
3
73°
51°
4
73°
53°
5
72°
52°
6
73°
53°
7
72°
52°
8
72°
53°
9
70°
49°
10
71°
46°
11
68°
47°
12
67°
48°
13
68°
50°
14
70°
51°
15
70°
50°
16
69°
50°
17
70°
46°
18
69°
47°
19
69°
49°
20
68°
47°
21
66°
44°
22
65°
46°
23
64°
48°
24
66°
46°
25
67°
47°
26
65°
48°
27
67°
47°
28
67°
47°
29
66°
46°
30
66°
47°
1
65°
48°
2
66°
48°
3
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kingston upon Thames
Kingston upon Thames's September 2026 forecast shows daily high temperatures ranging from 64° to 73°, with overnight lows between 44° and 53°. The average high for September is 69° with an average low of 49°. 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 Kingston upon Thames. See also: October | November | December.
