S
M
T
W
T
F
S
26
84°
67°
27
83°
64°
28
88°
67°
29
85°
63°
30
81°
67°
31
82°
67°
1
84°
66°
2
82°
68°
3
88°
68°
4
88°
67°
5
87°
64°
6
86°
66°
7
88°
67°
8
87°
66°
9
88°
67°
10
88°
66°
11
86°
65°
12
87°
66°
13
87°
66°
14
83°
60°
15
80°
59°
16
80°
59°
17
81°
65°
18
79°
65°
19
80°
62°
20
83°
64°
21
81°
64°
22
80°
63°
23
81°
64°
24
87°
61°
25
82°
63°
26
85°
61°
27
83°
62°
28
86°
63°
29
84°
62°
30
80°
62°
31
80°
61°
1
81°
62°
2
80°
62°
3
82°
61°
4
83°
55°
5
78°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Buchanan
Buchanan's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 52° and 68°. The average high for August is 84° with an average low of 64°. 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 Buchanan. See also: September | October | November.