The highest day temperature in January 2025 was 51°F. The lowest night temperature was 29°F. The average values for day and night temperatures during January were 41.7°F и 37.9°F respectivly.

The average sea surface temperature in January 2025 for Rotterdam was 41.7°F. The maximum and minimum values were 39.8°F and 45.0°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Rotterdam is 1.9 in.

The average wind speed in January is 12.2 mph. It makes January one of the most windy 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 January is 3.1 hours.