S
M
T
W
T
F
S
26
81°
57°
27
82°
64°
28
81°
61°
29
70°
55°
30
64°
46°
1
64°
41°
2
68°
39°
3
70°
34°
4
81°
57°
5
70°
54°
6
55°
46°
7
66°
45°
8
73°
43°
9
81°
52°
10
82°
54°
11
75°
50°
12
79°
45°
13
81°
50°
14
72°
48°
15
82°
52°
16
84°
68°
17
88°
64°
18
90°
72°
19
87°
68°
20
73°
61°
21
76°
66°
22
76°
66°
23
79°
65°
24
77°
66°
25
77°
65°
26
81°
65°
27
80°
66°
28
81°
68°
29
80°
65°
30
79°
64°
31
82°
63°
1
81°
60°
2
85°
64°
3
82°
64°
4
77°
60°
5
78°
61°
6
84°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Buchanan
Buchanan's May 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 60° and 68°. The average high for May is 80° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Buchanan. See also: June | July | August.