S
M
T
W
T
F
S
26
85°
66°
27
80°
58°
28
79°
63°
29
83°
65°
30
80°
61°
31
81°
57°
1
79°
58°
2
79°
57°
3
80°
58°
4
79°
57°
5
79°
58°
6
80°
58°
7
79°
60°
8
80°
64°
9
83°
65°
10
84°
65°
11
83°
64°
12
85°
66°
13
84°
59°
14
84°
57°
15
78°
58°
16
78°
58°
17
79°
59°
18
78°
57°
19
77°
56°
20
77°
57°
21
78°
58°
22
77°
57°
23
76°
57°
24
78°
59°
25
77°
63°
26
79°
64°
27
82°
65°
28
84°
62°
29
85°
55°
30
82°
59°
31
78°
55°
1
76°
60°
2
75°
61°
3
80°
53°
4
76°
57°
5
75°
62°
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 75° to 85°, with overnight lows between 53° and 66°. 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.