S
M
T
W
T
F
S
26
83°
64°
27
84°
64°
28
80°
59°
29
83°
57°
30
87°
57°
31
86°
63°
1
78°
68°
2
77°
61°
3
81°
59°
4
84°
58°
5
84°
61°
6
85°
64°
7
83°
68°
8
87°
64°
9
87°
69°
10
88°
69°
11
75°
66°
12
69°
61°
13
83°
62°
14
79°
68°
15
81°
63°
16
84°
73°
17
82°
62°
18
80°
62°
19
82°
65°
20
84°
61°
21
84°
62°
22
80°
59°
23
75°
52°
24
76°
52°
25
79°
52°
26
81°
55°
27
83°
60°
28
83°
56°
29
84°
68°
30
84°
68°
31
86°
69°
1
94°
70°
2
94°
70°
3
94°
70°
4
90°
65°
5
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sidney
Sidney's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Sidney. See also: September | October | November.