S
M
T
W
T
F
S
30
75°
55°
31
75°
51°
1
74°
41°
2
63°
44°
3
65°
52°
4
68°
47°
5
72°
41°
6
63°
40°
7
61°
44°
8
61°
49°
9
63°
42°
10
68°
50°
11
60°
46°
12
69°
41°
13
60°
38°
14
56°
36°
15
55°
46°
16
60°
42°
17
64°
40°
18
67°
34°
19
57°
37°
20
55°
44°
21
59°
46°
22
67°
39°
23
61°
43°
24
58°
46°
25
59°
42°
26
67°
37°
27
57°
35°
28
53°
38°
29
54°
41°
30
53°
37°
1
52°
42°
2
58°
45°
3
51°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ste. Rose du Lac
Ste. Rose du Lac's September 2026 forecast shows daily high temperatures ranging from 51° to 75°, with overnight lows between 31° and 55°. The average high for September is 62° with an average low of 42°. 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 Ste. Rose du Lac. See also: October | November | December.