S
M
T
W
T
F
S
26
61°
41°
27
62°
44°
28
65°
45°
29
66°
47°
30
69°
52°
1
73°
55°
2
69°
54°
3
68°
52°
4
62°
47°
5
64°
50°
6
64°
49°
7
62°
48°
8
61°
47°
9
57°
43°
10
59°
47°
11
65°
52°
12
64°
51°
13
60°
49°
14
59°
48°
15
62°
52°
16
65°
52°
17
66°
51°
18
63°
53°
19
68°
54°
20
69°
54°
21
69°
55°
22
70°
55°
23
69°
54°
24
68°
55°
25
67°
54°
26
66°
53°
27
62°
52°
28
61°
50°
29
66°
55°
30
68°
55°
31
67°
54°
1
67°
56°
2
69°
56°
3
70°
55°
4
70°
55°
5
69°
54°
6
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rotterdam
Rotterdam's May 2026 forecast shows daily high temperatures ranging from 57° to 73°, with overnight lows between 41° and 56°. The average high for May is 65° with an average low of 51°. 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 Rotterdam. See also: June | July | August.