The highest day temperature in June 2025 was 90°F. The lowest night temperature was 51°F. The average values for day and night temperatures during June were 72.7°F и 59.7°F respectivly.

The average sea surface temperature in June 2025 for Rotterdam was 63.2°F. The maximum and minimum values were 59.2°F and 68.2°F respectively.

You can expect various weather conditions during June. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in June for Rotterdam is 1.8 in.

The average wind speed in June is 9.5 mph. It makes June one of the most windless months of the year for Rotterdam.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Rotterdam in June is 9.6 hours.