S
M
T
W
T
F
S
26
92°
82°
27
86°
77°
28
88°
83°
29
86°
80°
30
86°
78°
31
87°
83°
1
87°
77°
2
83°
75°
3
84°
76°
4
89°
76°
5
85°
78°
6
93°
74°
7
91°
77°
8
90°
79°
9
94°
77°
10
93°
79°
11
93°
79°
12
93°
80°
13
91°
80°
14
94°
79°
15
93°
80°
16
91°
81°
17
93°
82°
18
90°
81°
19
92°
81°
20
89°
79°
21
90°
80°
22
90°
78°
23
91°
76°
24
88°
79°
25
88°
77°
26
89°
77°
27
89°
76°
28
88°
77°
29
88°
79°
30
89°
78°
31
89°
79°
1
90°
79°
2
91°
78°
3
91°
78°
4
90°
77°
5
91°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Treasure Island
Treasure Island's August 2026 forecast shows daily high temperatures ranging from 88° to 94°, with overnight lows between 76° and 82°. The average high for August is 91° with an average low of 79°. 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 Treasure Island. See also: September | October | November.
