S
M
T
W
T
F
S
26
72°
55°
27
75°
57°
28
78°
63°
29
77°
52°
30
79°
54°
1
70°
57°
2
78°
56°
3
78°
58°
4
80°
57°
5
77°
53°
6
77°
60°
7
74°
59°
8
78°
61°
9
79°
57°
10
73°
56°
11
76°
55°
12
73°
55°
13
73°
59°
14
74°
60°
15
78°
62°
16
78°
58°
17
77°
58°
18
76°
62°
19
78°
63°
20
77°
62°
21
80°
63°
22
79°
64°
23
76°
63°
24
80°
59°
25
80°
64°
26
81°
64°
27
82°
63°
28
82°
65°
29
81°
65°
30
77°
66°
31
82°
63°
1
81°
61°
2
81°
65°
3
79°
65°
4
78°
61°
5
81°
62°
6
80°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kumamoto-shi
Kumamoto-shi's May 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 52° and 66°. The average high for May is 78° 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 May weather will actually feel in Kumamoto-shi. See also: June | July | August.