S
M
T
W
T
F
S
26
84°
64°
27
84°
61°
28
74°
65°
29
75°
66°
30
82°
63°
31
85°
60°
1
80°
66°
2
73°
65°
3
80°
59°
4
82°
59°
5
80°
66°
6
81°
66°
7
82°
64°
8
81°
64°
9
79°
62°
10
76°
61°
11
75°
58°
12
74°
58°
13
76°
57°
14
75°
66°
15
72°
56°
16
72°
55°
17
80°
59°
18
73°
56°
19
71°
57°
20
77°
54°
21
71°
55°
22
75°
60°
23
78°
60°
24
75°
59°
25
76°
58°
26
77°
60°
27
75°
59°
28
74°
60°
29
76°
58°
30
77°
59°
31
78°
56°
1
70°
54°
2
67°
54°
3
68°
52°
4
70°
53°
5
73°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gatineau
Gatineau's August 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 52° and 66°. The average high for August is 76° with an average low of 59°. 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 Gatineau. See also: September | October | November.
