S
M
T
W
T
F
S
26
87°
68°
27
88°
70°
28
78°
62°
29
80°
59°
30
83°
58°
31
83°
61°
1
75°
68°
2
80°
64°
3
83°
59°
4
82°
62°
5
82°
68°
6
78°
66°
7
87°
65°
8
88°
66°
9
86°
59°
10
87°
62°
11
76°
66°
12
77°
65°
13
76°
65°
14
81°
69°
15
81°
72°
16
83°
72°
17
79°
62°
18
81°
59°
19
82°
62°
20
80°
60°
21
78°
63°
22
77°
62°
23
74°
57°
24
74°
52°
25
78°
51°
26
83°
59°
27
79°
61°
28
81°
58°
29
80°
61°
30
86°
69°
31
89°
71°
1
91°
71°
2
95°
70°
3
90°
67°
4
86°
66°
5
85°
63°
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 85° to 95°, with overnight lows between 63° and 71°. The average high for August is 89° with an average low of 68°. 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.