S
M
T
W
T
F
S
30
85°
73°
31
84°
72°
1
85°
73°
2
84°
71°
3
83°
71°
4
83°
72°
5
84°
74°
6
83°
73°
7
82°
74°
8
83°
71°
9
83°
69°
10
85°
72°
11
84°
72°
12
81°
67°
13
80°
69°
14
81°
67°
15
80°
68°
16
Hist. Avg.
79°
69°
17
Hist. Avg.
78°
68°
18
Hist. Avg.
78°
68°
19
Hist. Avg.
78°
68°
20
Hist. Avg.
77°
68°
21
Hist. Avg.
77°
67°
22
Hist. Avg.
77°
67°
23
Hist. Avg.
76°
67°
24
Hist. Avg.
76°
66°
25
Hist. Avg.
76°
66°
26
Hist. Avg.
75°
66°
27
Hist. Avg.
75°
66°
28
Hist. Avg.
75°
65°
29
Hist. Avg.
74°
65°
30
Hist. Avg.
74°
65°
1
Hist. Avg.
74°
64°
2
Hist. Avg.
74°
64°
3
Hist. Avg.
73°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Koto-ku
Koto-ku's September 2026 forecast shows daily high temperatures ranging from 80° to 85°, with overnight lows between 67° and 74°. The average high for September is 83° with an average low of 71°. 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 Koto-ku. See also: October | November | December.
