S
M
T
W
T
F
S
30
70°
54°
31
72°
48°
1
71°
53°
2
66°
58°
3
72°
54°
4
70°
52°
5
68°
48°
6
70°
49°
7
69°
48°
8
65°
49°
9
69°
54°
10
69°
49°
11
65°
48°
12
64°
48°
13
65°
46°
14
63°
44°
15
61°
49°
16
66°
49°
17
63°
45°
18
58°
43°
19
60°
42°
20
64°
48°
21
66°
48°
22
66°
49°
23
66°
47°
24
64°
46°
25
64°
45°
26
65°
46°
27
64°
47°
28
65°
44°
29
57°
40°
30
52°
38°
1
51°
37°
2
55°
44°
3
61°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lac-Ouareau
Lac-Ouareau's September 2026 forecast shows daily high temperatures ranging from 51° to 72°, with overnight lows between 37° and 58°. The average high for September is 64° with an average low of 47°. 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 Lac-Ouareau. See also: October | November | December.
