S
M
T
W
T
F
S
26
81°
67°
27
84°
72°
28
87°
69°
29
82°
68°
30
81°
71°
31
83°
73°
1
86°
71°
2
84°
74°
3
85°
77°
4
83°
74°
5
86°
76°
6
90°
78°
7
90°
74°
8
87°
74°
9
91°
76°
10
89°
72°
11
87°
71°
12
84°
74°
13
87°
76°
14
82°
77°
15
85°
74°
16
80°
73°
17
91°
76°
18
86°
74°
19
88°
70°
20
89°
70°
21
79°
68°
22
76°
69°
23
83°
63°
24
81°
62°
25
82°
65°
26
81°
69°
27
84°
71°
28
85°
70°
29
84°
68°
30
83°
70°
31
84°
69°
1
85°
67°
2
81°
65°
3
80°
66°
4
84°
71°
5
82°
66°
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 76° to 85°, with overnight lows between 62° and 71°. The average high for August is 82° with an average low of 67°. 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.