S
M
T
W
T
F
S
26
88°
71°
27
87°
71°
28
84°
70°
29
83°
70°
30
83°
64°
31
81°
63°
1
81°
64°
2
82°
66°
3
81°
70°
4
82°
67°
5
82°
65°
6
83°
70°
7
85°
70°
8
83°
69°
9
82°
68°
10
85°
67°
11
83°
64°
12
85°
70°
13
86°
69°
14
87°
70°
15
85°
69°
16
88°
70°
17
88°
70°
18
87°
68°
19
85°
63°
20
80°
62°
21
80°
62°
22
81°
61°
23
81°
61°
24
82°
62°
25
82°
61°
26
83°
61°
27
83°
62°
28
85°
62°
29
81°
61°
30
80°
61°
31
85°
66°
1
86°
62°
2
85°
61°
3
80°
60°
4
81°
61°
5
84°
65°
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 80° to 88°, with overnight lows between 60° and 71°. The average high for August is 83° with an average low of 65°. 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.