S
M
T
W
T
F
S
26
62°
47°
27
62°
49°
28
63°
50°
29
66°
50°
30
62°
46°
31
61°
46°
1
61°
45°
2
62°
48°
3
66°
54°
4
65°
48°
5
62°
46°
6
62°
46°
7
65°
51°
8
66°
54°
9
69°
49°
10
63°
46°
11
62°
45°
12
61°
46°
13
61°
45°
14
62°
43°
15
62°
47°
16
66°
48°
17
62°
44°
18
62°
44°
19
66°
47°
20
68°
51°
21
68°
52°
22
69°
52°
23
69°
50°
24
68°
46°
25
67°
42°
26
58°
40°
27
59°
40°
28
61°
41°
29
63°
46°
30
62°
47°
31
63°
49°
1
64°
47°
2
62°
41°
3
57°
41°
4
63°
47°
5
65°
47°
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 57° to 69°, with overnight lows between 40° and 54°. The average high for August 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 August weather will actually feel in Lac-Jacques-Cartier. See also: September | October | November.
