S
M
T
W
T
F
S
30
77°
54°
31
77°
50°
1
76°
45°
2
69°
44°
3
68°
48°
4
72°
53°
5
75°
54°
6
75°
45°
7
71°
44°
8
70°
46°
9
72°
51°
10
65°
52°
11
72°
51°
12
72°
50°
13
70°
50°
14
64°
44°
15
64°
41°
16
63°
39°
17
63°
47°
18
65°
41°
19
63°
49°
20
67°
50°
21
68°
45°
22
65°
38°
23
61°
42°
24
60°
44°
25
59°
39°
26
61°
40°
27
66°
47°
28
66°
47°
29
Hist. Avg.
62°
43°
30
Hist. Avg.
61°
42°
1
Hist. Avg.
61°
42°
2
Hist. Avg.
60°
42°
3
Hist. Avg.
60°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lac-Brompton-Sud
Lac-Brompton-Sud's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 38° and 54°. The average high for September is 68° with an average low of 46°. 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-Brompton-Sud. See also: October | November | December.
