S
M
T
W
T
F
S
26
85°
73°
27
86°
73°
28
86°
73°
29
87°
72°
30
86°
72°
31
86°
72°
1
85°
72°
2
85°
73°
3
88°
74°
4
89°
75°
5
86°
76°
6
87°
75°
7
86°
74°
8
86°
74°
9
87°
72°
10
86°
72°
11
89°
73°
12
86°
73°
13
87°
72°
14
86°
73°
15
87°
72°
16
90°
73°
17
88°
73°
18
86°
72°
19
85°
73°
20
89°
72°
21
88°
74°
22
85°
73°
23
86°
74°
24
85°
73°
25
84°
72°
26
85°
71°
27
84°
73°
28
84°
71°
29
85°
70°
30
86°
69°
31
83°
70°
1
84°
72°
2
84°
73°
3
83°
72°
4
82°
73°
5
83°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Osaka
Osaka's August 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 69° and 76°. The average high for August is 86° with an average low of 73°. 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 Osaka. See also: September | October | November.