S
M
T
W
T
F
S
30
73°
56°
31
79°
55°
1
77°
60°
2
80°
58°
3
80°
61°
4
75°
57°
5
69°
56°
6
73°
52°
7
78°
51°
8
76°
54°
9
71°
54°
10
74°
54°
11
67°
46°
12
80°
43°
13
80°
62°
14
67°
43°
15
69°
39°
16
79°
53°
17
69°
51°
18
68°
40°
19
64°
36°
20
64°
42°
21
62°
42°
22
64°
35°
23
68°
35°
24
70°
33°
25
74°
51°
26
73°
54°
27
64°
51°
28
60°
50°
29
64°
53°
30
69°
56°
1
73°
57°
2
69°
55°
3
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coteau-du-Lac
Coteau-du-Lac's September 2026 forecast shows daily high temperatures ranging from 60° to 74°, with overnight lows between 50° and 57°. The average high for September is 68° with an average low of 53°. 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 Coteau-du-Lac. See also: October | November | December.
