Weather in Rotterdam: May
 |
Average day temperature: | 62.4°F |
| Average night temperature: | 51.4°F | |
 |
Sea water temperature: | 54.2°F |
 |
Number of sunny days: | 11 days |
| Day length: | 14.9 - 16.4 hours | |
 |
Number of rainy days: | 3 days |
| Precipitation totals: | 1.7 in. | |
| more information | ||
forecast
| Rotterdam |
temperature
| Rotterdam |
Air temperature in May, °F
The highest day temperature during May of 2026 was 84°F. At the same time the lowest night temperature was 41°F. Daily and nightly averages during May were 64.0°F and 51.3°F.
Sea water temperature in Rotterdam in May, °F
The average sea water temperature in May of 2026 was 55.4°F. The highest and lowest sea temperatures during the month were 59.5°F and 52.9°F.
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 1.5 in. Other months of the year show relatively similar values.
The average wind speed value in May is 8.8 mph It makes May lest windy month of the year.
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: 8.1.
Best time for vacation in Rotterdam
Rotterdam on a weather map
11 mph
17 mph
18 mph
17 mph
14 mph
16 mph
14 mph
13 mph
