Rotterdam weather and climate in 2025
Day
22 °C
Night
14 °C
Sea
17 °C
Precipitation
80 mm
in month
Rainy days
12 days
in month
Daylight
16 hours
average
Sunshine
6 hours
average
Humidity
79 %
Day
22 °C
Night
14 °C
Sea
17 °C
Precipitation
80 mm
in month
Rainy days
12 days
in month
Daylight
16 hours
average
Sunshine
6 hours
average
Humidity
79 %
Overview: Rotterdam
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Weather overview for Rotterdam
Weather overview
Rotterdam (Netherlands) in general has a mild climate. Temperatures during the day are in the range from 6 °C (43 °F) in January to 22 °C (72 °F) in July. The driest month is April with just 10 days of rain, on the contrary, the month when it rains the most is December with 15 days of rain. The highest night temperatures could be experienced in July with 14 °C (57 °F), the lowest in February with 1 °C (34 °F).
January weather
The minimum of the day temperature can be noticed, the value of this measure is 6 °C (43 °F) in Rotterdam, while the night temperature continues to descent, its value is 1 °C (34 °F). The number of rainy days descent's start could be observed, and the beginning of the descent of the rainfall amount could be noticed too, its value is 74 mm (2.90 in). The wind speed reaches its maximum, with its value of 6.
February weather
The rainfall amount continues to descent, with its value being 58 mm (2.28 in) in Rotterdam, and the descent of the number of rainy days can be observed too, with its value of 11 days. The night temperature is on its minimum. The beginning of the rise of the number of sun hours (without clouds) could be noticed, with its value being 3 hours.
March weather
The beginning of the rise of the day temperature could be noticed, the value of this measure is 10 °C (49 °F) in Rotterdam, and the night temperature starts to rise too, with its value being 3 °C (38 °F). The beginning of the rise of the number of rainy days could be noticed, and the beginning of the rise of the rainfall amount could be noticed too, its value is 66 mm (2.60 in). The number of sun hours (without clouds) continues to rise, the value of this measure is 3 hours.
April weather
The day temperature rises similarly to the previous month, with its value being 12 °C (54 °F) in Rotterdam, and the night temperature rises similarly to the previous month as well, its value is 6 °C (44 °F). The number of rainy days reaches its minimum, with its value being 10 days, and the minimum of the rainfall amount can be noticed as well, with its value of 44 mm (1.72 in). The number of sun hours (without clouds) rises similarly to the previous month, with its value being 5 hours.
May weather
The day temperature continues to rise, with its value of 17 °C (63 °F) in Rotterdam, and the night temperature continues to rise too, its value is 9 °C (49 °F). The beginning of the rise of the number of rainy days could be noticed, its value is 11 days, and the rainfall amount rise's start could be observed too, the value of this measure is 56 mm (2.22 in). The maximum of the number of sun hours (without clouds) is observable, with its value being 7 hours. The humidity reaches its minimum, with its value of 78 %.
June weather
The tourist season slowly starts in Rotterdam. The rise of the day temperature can be observed, and the rise of the night temperature can be observed as well, with its value being 12 °C (53 °F). The rise of the rainfall amount can be observed, the value of this measure is 69 mm (2.72 in). The number of sun hours (without clouds) starts to descent in June. The day length reaches its maximum, with its value of 16 hours.
July weather
There is pending tourist season in Rotterdam. The day temperature is on its maximum, with its value of 22 °C (72 °F), and the maximum of the night temperature is observable too. The minimum of the wind speed is observable, the value of this measure is 4. The rainfall amount continues to rise, with its value being 80 mm (3.17 in).
August weather
The tourist season is close to its peak in Rotterdam. The value of the day temperature is 22 °C (71 °F) in August.
September weather
The beginning of the descent of the day temperature could be noticed, the value of this measure is 19 °C (66 °F) in Rotterdam, and the night temperature descent's start could be observed too in this month. The tourist season is taking place. The beginning of the descent of the number of sun hours (without clouds) could be noticed in this month.
October weather
The number of rainy days rise's start could be observed, with its value of 13 days in Rotterdam, while the maximum of the rainfall amount is observable. The descent of the day temperature can be observed, its value is 15 °C (58 °F), and the night temperature descents similarly to the previous month too, with its value of 8 °C (47 °F). The descent of the number of sun hours (without clouds) can be observed, its value is 3 hours.
November weather
The descent of the day temperature can be observed, the value of this measure is 10 °C (50 °F) in Rotterdam, and the night temperature descents similarly to the previous month too, with its value being 5 °C (41 °F). The descent of the number of sun hours (without clouds) can be observed, with its value being 2 hours. The number of rainy days rises similarly to the previous month, its value is 15 days.
December weather
The maximum of the number of rainy days is observable, the value of this measure is 15 days in Rotterdam. The night temperature continues to descent, the value of this measure is 2 °C (36 °F), and the day temperature descents similarly to the previous month as well, its value is 7 °C (44 °F). The minimum of the number of sun hours (without clouds) is observable, with its value being 1 hour. The humidity reaches its maximum, the value of this measure is 89 %. The day length is on its minimum, its value is 8 hours.
FAQs
How many hours of sun to expect in April in Rotterdam?
There is an average length of sunshine of 5 hours per day in April in Rotterdam.
Is there a dry season in Rotterdam in May?
No, May is not a dry month in Rotterdam, expect rain approximately 11 days in a month.
Are there good conditions to visit in Rotterdam in June?
There are good conditions for visiting in Rotterdam in June. There are some people, who may feel a slight chill at 20 °C (68 °F), but others will feel perfectly fine. The temperature of 12 °C (53 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the sea temperature in Rotterdam in July?
The sea will reach 17 °C (63 °F) in Rotterdam in July. At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions. That's 3 °C (37 °F) more than in the previous month.
Is there a wet season in August in Rotterdam?
No, there is no wet season in August in Rotterdam - you can expect 12 days of rain during the month.
What is the temperature in Rotterdam during the day in September?
In Rotterdam in September, the average daily temperatures will be 19 °C (66 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. This is a decrease of 3 °C (38 °F) compared to the last month. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
What is the night temperature in October in Rotterdam?
The average night temperature in Rotterdam in October is 8 °C (47 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating. In absolute terms, the decrease compared to the last month is 3 °C (38 °F).
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