S
M
T
W
T
F
S
26
88°
50°
27
82°
52°
28
86°
43°
29
84°
43°
30
82°
43°
31
88°
41°
1
91°
41°
2
82°
39°
3
70°
41°
4
73°
30°
5
79°
28°
6
84°
32°
7
86°
36°
8
84°
37°
9
84°
39°
10
86°
37°
11
84°
41°
12
79°
50°
13
63°
41°
14
66°
45°
15
70°
43°
16
75°
47°
17
75°
47°
18
72°
45°
19
75°
46°
20
81°
45°
21
82°
45°
22
78°
47°
23
79°
46°
24
79°
44°
25
80°
46°
26
79°
44°
27
75°
45°
28
74°
37°
29
74°
43°
30
70°
43°
31
74°
42°
1
71°
42°
2
71°
40°
3
72°
41°
4
74°
41°
5
75°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Island Park
Island Park's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 37° and 47°. The average high for August is 75° with an average low of 44°. 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 Island Park. See also: September | October | November.