S
M
T
W
T
F
S
26
99°
75°
27
100°
77°
28
91°
77°
29
86°
73°
30
79°
72°
31
86°
70°
1
82°
64°
2
86°
61°
3
86°
61°
4
92°
72°
5
80°
69°
6
84°
69°
7
89°
69°
8
91°
75°
9
94°
72°
10
96°
70°
11
97°
71°
12
94°
68°
13
89°
68°
14
91°
66°
15
89°
65°
16
85°
63°
17
87°
64°
18
93°
70°
19
92°
70°
20
92°
69°
21
91°
70°
22
92°
69°
23
92°
68°
24
91°
69°
25
91°
69°
26
90°
67°
27
90°
67°
28
91°
68°
29
91°
66°
30
90°
67°
31
90°
67°
1
89°
66°
2
90°
67°
3
90°
67°
4
89°
66°
5
89°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sibley
Sibley's August 2026 forecast shows daily high temperatures ranging from 80° to 97°, with overnight lows between 63° and 75°. The average high for August is 90° with an average low of 68°. 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 Sibley. See also: September | October | November.
