S
M
T
W
T
F
S
30
76°
60°
31
75°
65°
1
76°
65°
2
74°
64°
3
77°
62°
4
74°
59°
5
73°
63°
6
75°
63°
7
73°
57°
8
72°
56°
9
73°
57°
10
72°
56°
11
71°
58°
12
71°
58°
13
72°
60°
14
74°
54°
15
71°
53°
16
71°
52°
17
70°
53°
18
69°
55°
19
71°
58°
20
73°
56°
21
72°
53°
22
68°
51°
23
68°
53°
24
70°
55°
25
67°
50°
26
68°
49°
27
67°
49°
28
66°
55°
29
67°
48°
30
69°
55°
1
70°
50°
2
Hist. Avg.
67°
49°
3
Hist. Avg.
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sapporo Kokusai
Sapporo Kokusai's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 48° and 65°. The average high for September is 71° with an average low of 56°. 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 Sapporo Kokusai. See also: October | November | December.
