S
M
T
W
T
F
S
26
83°
64°
27
80°
59°
28
81°
61°
29
83°
62°
30
82°
58°
31
83°
61°
1
82°
58°
2
82°
56°
3
81°
57°
4
79°
55°
5
80°
56°
6
80°
56°
7
81°
55°
8
82°
59°
9
83°
60°
10
79°
61°
11
83°
63°
12
85°
64°
13
83°
63°
14
86°
56°
15
85°
55°
16
78°
58°
17
79°
62°
18
78°
56°
19
80°
54°
20
77°
55°
21
78°
58°
22
81°
59°
23
83°
60°
24
84°
61°
25
83°
53°
26
83°
54°
27
76°
55°
28
76°
53°
29
77°
59°
30
81°
60°
31
83°
60°
1
83°
53°
2
80°
54°
3
81°
57°
4
75°
57°
5
75°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arnold
Arnold's August 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 53° and 64°. The average high for August is 81° with an average low of 58°. 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 Arnold. See also: September | October | November.