S
M
T
W
T
F
S
26
73°
54°
27
72°
59°
28
75°
55°
29
61°
54°
30
59°
54°
1
61°
54°
2
72°
50°
3
66°
57°
4
64°
50°
5
70°
46°
6
72°
50°
7
79°
54°
8
68°
59°
9
70°
48°
10
70°
46°
11
77°
52°
12
73°
54°
13
77°
57°
14
72°
57°
15
82°
57°
16
85°
56°
17
90°
58°
18
91°
61°
19
89°
65°
20
77°
67°
21
77°
63°
22
78°
63°
23
76°
71°
24
86°
64°
25
78°
60°
26
80°
61°
27
81°
62°
28
77°
59°
29
78°
59°
30
76°
64°
31
80°
65°
1
76°
60°
2
77°
62°
3
76°
61°
4
77°
60°
5
77°
61°
6
79°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Okayama-shi
Okayama-shi's May 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 56° and 71°. The average high for May is 80° with an average low of 62°. 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 Okayama-shi. See also: June | July | August.