Weather in Rotterdam: May
 |
Average day temperature: | 62.3°F |
| Average night temperature: | 51.4°F | |
 |
Sea water temperature: | 54.1°F |
 |
Number of sunny days: | 11 days |
| Day length: | 14.9 - 16.4 hours | |
 |
Number of rainy days: | 3 days |
| Precipitation totals: | 1.8 in. | |
| more information | ||
14 days
forecast
forecast
| Rotterdam |
sea water
temperature
temperature
| Rotterdam |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 77°F. At the same time the lowest night temperature was 42°F. Daily and nightly averages during May were 63.7°F and 51.0°F.
Sea water temperature in Rotterdam in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 56.2°F. The highest and lowest sea temperatures during the month were 57.9°F and 53.6°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in Rotterdam in May is 1.7 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 9.1 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 8.0.
Best time for vacation in Rotterdam
Rotterdam on a weather map
Places in Netherlands:
Name
°F
24 Hours Forecast
Rotterdam
Local time: 23:49
December 18, thursday
0000
46°F
N
12 mph
12 mph
0300
46°F
N
14 mph
14 mph
0600
48°F
N
15 mph
15 mph
0900
48°F
NE
14 mph
14 mph
1200
48°F
N
14 mph
14 mph
1500
50°F
N
15 mph
15 mph
1800
52°F
N
17 mph
17 mph
2100
54°F
N
19 mph
19 mph
