S
M
T
W
T
F
S
26
80°
67°
27
79°
65°
28
79°
61°
29
80°
67°
30
84°
68°
31
85°
66°
1
80°
64°
2
83°
66°
3
83°
59°
4
78°
62°
5
80°
63°
6
79°
60°
7
80°
59°
8
79°
58°
9
80°
60°
10
81°
65°
11
83°
59°
12
80°
59°
13
81°
57°
14
79°
58°
15
79°
60°
16
80°
58°
17
78°
58°
18
78°
56°
19
79°
56°
20
80°
62°
21
80°
65°
22
83°
66°
23
86°
66°
24
86°
65°
25
87°
59°
26
82°
57°
27
79°
59°
28
80°
63°
29
83°
56°
30
79°
55°
31
78°
55°
1
77°
59°
2
76°
58°
3
77°
55°
4
76°
54°
5
76°
54°
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 76° to 87°, with overnight lows between 54° and 68°. The average high for August is 80° with an average low of 60°. 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.