S
M
T
W
T
F
S
26
76°
55°
27
78°
54°
28
77°
55°
29
82°
56°
30
85°
56°
31
83°
54°
1
78°
54°
2
81°
55°
3
76°
54°
4
81°
56°
5
84°
55°
6
75°
53°
7
75°
52°
8
80°
55°
9
82°
56°
10
82°
55°
11
81°
55°
12
76°
54°
13
75°
53°
14
73°
49°
15
73°
53°
16
79°
54°
17
82°
50°
18
81°
49°
19
75°
51°
20
78°
45°
21
79°
47°
22
78°
46°
23
79°
50°
24
78°
42°
25
71°
46°
26
71°
51°
27
77°
50°
28
77°
50°
29
80°
51°
30
80°
50°
31
79°
47°
1
77°
40°
2
67°
42°
3
70°
48°
4
72°
42°
5
77°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arcola
Arcola's August 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 36° and 56°. The average high for August is 78° with an average low of 51°. 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 Arcola. See also: September | October | November.