S
M
T
W
T
F
S
26
74°
58°
27
75°
57°
28
79°
53°
29
68°
60°
30
N/A
1
68°
58°
2
78°
58°
3
74°
65°
4
72°
58°
5
72°
60°
6
71°
58°
7
77°
60°
8
79°
61°
9
79°
58°
10
73°
57°
11
74°
59°
12
75°
58°
13
72°
55°
14
71°
58°
15
70°
55°
16
71°
59°
17
71°
61°
18
72°
57°
19
71°
57°
20
70°
58°
21
70°
57°
22
71°
57°
23
73°
61°
24
71°
62°
25
73°
59°
26
73°
59°
27
75°
61°
28
72°
60°
29
77°
60°
30
76°
63°
31
76°
63°
1
78°
62°
2
78°
64°
3
74°
63°
4
73°
61°
5
72°
61°
6
73°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hamamatsu-shi
Hamamatsu-shi's May 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 55° and 65°. The average high for May is 73° 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 Hamamatsu-shi. See also: June | July | August.