S
M
T
W
T
F
S
26
72°
56°
27
71°
56°
28
72°
55°
29
71°
53°
30
65°
49°
31
62°
46°
1
61°
46°
2
61°
47°
3
62°
46°
4
63°
52°
5
65°
53°
6
66°
54°
7
63°
50°
8
62°
48°
9
62°
49°
10
64°
46°
11
64°
43°
12
63°
50°
13
62°
55°
14
72°
46°
15
69°
50°
16
69°
55°
17
71°
48°
18
69°
49°
19
67°
46°
20
60°
43°
21
60°
42°
22
61°
43°
23
67°
47°
24
69°
48°
25
68°
51°
26
69°
50°
27
68°
51°
28
69°
50°
29
68°
48°
30
68°
50°
31
69°
43°
1
67°
39°
2
59°
42°
3
58°
49°
4
63°
48°
5
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lac-Jacques-Cartier
Lac-Jacques-Cartier's August 2026 forecast shows daily high temperatures ranging from 58° to 72°, with overnight lows between 39° and 56°. The average high for August is 66° with an average low of 49°. 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-Jacques-Cartier. See also: September | October | November.
