S
M
T
W
T
F
S
30
82°
60°
31
77°
61°
1
73°
55°
2
73°
47°
3
72°
51°
4
74°
58°
5
74°
54°
6
80°
52°
7
70°
62°
8
73°
60°
9
62°
40°
10
73°
33°
11
75°
54°
12
61°
48°
13
58°
38°
14
60°
38°
15
60°
49°
16
60°
36°
17
61°
34°
18
66°
31°
19
63°
53°
20
59°
35°
21
64°
35°
22
65°
35°
23
67°
36°
24
55°
53°
25
65°
55°
26
70°
53°
27
65°
50°
28
64°
52°
29
57°
49°
30
60°
46°
1
60°
45°
2
56°
41°
3
53°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sioux Lookout
Sioux Lookout's September 2026 forecast shows daily high temperatures ranging from 53° to 70°, with overnight lows between 41° and 55°. The average high for September is 61° 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 Sioux Lookout. See also: October | November | December.
