S
M
T
W
T
F
S
26
66°
44°
27
59°
53°
28
71°
51°
29
54°
49°
30
63°
43°
1
61°
50°
2
71°
54°
3
71°
51°
4
73°
58°
5
71°
50°
6
74°
51°
7
76°
56°
8
75°
60°
9
66°
57°
10
76°
50°
11
74°
52°
12
74°
58°
13
77°
57°
14
63°
53°
15
73°
53°
16
72°
54°
17
68°
56°
18
78°
59°
19
80°
61°
20
72°
60°
21
67°
59°
22
71°
56°
23
71°
56°
24
73°
61°
25
77°
64°
26
79°
67°
27
72°
57°
28
72°
57°
29
71°
58°
30
68°
54°
31
66°
55°
1
68°
55°
2
69°
56°
3
72°
58°
4
73°
58°
5
71°
59°
6
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Okayama
Okayama's May 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 54° and 67°. The average high for May is 72° with an average low of 58°. 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. See also: June | July | August.
