S
M
T
W
T
F
S
26
91°
81°
27
89°
76°
28
89°
83°
29
90°
84°
30
90°
84°
31
92°
82°
1
91°
83°
2
90°
84°
3
90°
83°
4
91°
82°
5
90°
83°
6
89°
83°
7
90°
82°
8
89°
81°
9
92°
84°
10
91°
84°
11
92°
83°
12
91°
82°
13
91°
82°
14
92°
83°
15
88°
83°
16
88°
82°
17
88°
81°
18
88°
83°
19
88°
80°
20
88°
80°
21
88°
82°
22
89°
83°
23
88°
83°
24
88°
81°
25
89°
81°
26
88°
82°
27
88°
82°
28
89°
81°
29
89°
81°
30
88°
82°
31
87°
81°
1
88°
80°
2
86°
81°
3
87°
80°
4
87°
79°
5
88°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Stock Island
Stock Island's August 2026 forecast shows daily high temperatures ranging from 86° to 92°, with overnight lows between 79° and 84°. The average high for August is 89° with an average low of 82°. 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 Stock Island. See also: September | October | November.
