S
M
T
W
T
F
S
26
86°
64°
27
86°
63°
28
85°
63°
29
82°
62°
30
84°
63°
31
85°
63°
1
85°
62°
2
82°
60°
3
78°
57°
4
79°
61°
5
84°
63°
6
86°
62°
7
83°
60°
8
78°
57°
9
79°
61°
10
84°
61°
11
85°
62°
12
85°
61°
13
77°
59°
14
77°
60°
15
80°
61°
16
82°
61°
17
85°
60°
18
85°
60°
19
84°
61°
20
85°
62°
21
75°
51°
22
75°
49°
23
74°
54°
24
75°
48°
25
73°
47°
26
72°
48°
27
71°
48°
28
72°
49°
29
73°
54°
30
78°
57°
31
78°
55°
1
77°
54°
2
81°
59°
3
84°
51°
4
79°
48°
5
77°
49°
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 71° to 86°, with overnight lows between 47° and 64°. The average high for August is 80° with an average low of 57°. 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.