S
M
T
W
T
F
S
26
79°
63°
27
82°
66°
28
91°
61°
29
97°
68°
30
93°
64°
31
90°
66°
1
90°
68°
2
93°
64°
3
91°
70°
4
93°
66°
5
88°
64°
6
88°
66°
7
86°
64°
8
91°
63°
9
90°
64°
10
93°
66°
11
91°
64°
12
91°
64°
13
97°
66°
14
97°
66°
15
93°
66°
16
91°
66°
17
79°
66°
18
86°
63°
19
95°
63°
20
82°
66°
21
70°
59°
22
76°
54°
23
78°
58°
24
82°
61°
25
84°
62°
26
86°
61°
27
82°
60°
28
73°
56°
29
72°
54°
30
78°
56°
31
79°
59°
1
73°
57°
2
74°
56°
3
75°
57°
4
68°
51°
5
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Plan-les-Ouates
Plan-les-Ouates's August 2026 forecast shows daily high temperatures ranging from 68° to 86°, with overnight lows between 51° and 62°. The average high for August is 77° with an average low of 57°. 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 Plan-les-Ouates. See also: September | October | November.