S
M
T
W
T
F
S
26
82°
61°
27
82°
61°
28
81°
60°
29
80°
59°
30
79°
56°
31
72°
52°
1
71°
51°
2
72°
51°
3
72°
52°
4
75°
58°
5
75°
58°
6
76°
59°
7
73°
59°
8
75°
58°
9
74°
56°
10
74°
50°
11
72°
49°
12
75°
59°
13
76°
60°
14
81°
59°
15
80°
57°
16
75°
59°
17
80°
57°
18
78°
57°
19
74°
49°
20
71°
48°
21
71°
47°
22
72°
48°
23
73°
48°
24
75°
50°
25
77°
49°
26
77°
53°
27
78°
54°
28
78°
51°
29
76°
52°
30
77°
54°
31
77°
50°
1
76°
45°
2
69°
44°
3
68°
48°
4
72°
53°
5
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lac-Brompton-Sud
Lac-Brompton-Sud's August 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 44° and 61°. The average high for August is 75° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Lac-Brompton-Sud. See also: September | October | November.