S
M
T
W
T
F
S
26
98°
77°
27
97°
77°
28
98°
76°
29
98°
77°
30
99°
78°
31
99°
77°
1
97°
76°
2
94°
75°
3
96°
76°
4
96°
76°
5
97°
75°
6
97°
76°
7
96°
76°
8
97°
75°
9
96°
75°
10
96°
74°
11
95°
75°
12
96°
75°
13
93°
73°
14
94°
73°
15
97°
74°
16
98°
73°
17
96°
74°
18
97°
73°
19
96°
71°
20
97°
69°
21
93°
68°
22
91°
67°
23
91°
68°
24
92°
68°
25
96°
69°
26
95°
68°
27
95°
68°
28
96°
70°
29
97°
73°
30
97°
73°
31
96°
72°
1
95°
72°
2
94°
70°
3
94°
68°
4
93°
71°
5
93°
70°
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 91° to 99°, with overnight lows between 67° and 78°. The average high for August is 96° 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 Sibley. See also: September | October | November.
