S
M
T
W
T
F
S
26
85°
62°
27
86°
62°
28
88°
68°
29
82°
63°
30
84°
57°
31
87°
55°
1
85°
60°
2
78°
66°
3
82°
62°
4
82°
65°
5
83°
65°
6
86°
64°
7
87°
64°
8
84°
63°
9
85°
64°
10
87°
62°
11
84°
63°
12
81°
60°
13
83°
60°
14
83°
58°
15
82°
59°
16
78°
55°
17
87°
63°
18
86°
62°
19
87°
63°
20
86°
61°
21
85°
60°
22
85°
62°
23
86°
62°
24
87°
61°
25
85°
62°
26
83°
62°
27
82°
61°
28
82°
61°
29
81°
59°
30
82°
60°
31
83°
60°
1
82°
57°
2
77°
52°
3
75°
52°
4
75°
53°
5
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lost River State Park
Lost River State Park's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 51° and 66°. The average high for August is 83° with an average low of 60°. 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 Lost River State Park. See also: September | October | November.