January weather - Winter 2025 - Rotterdam, Netherlands

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

An old ship dock in Rotterdam, Netherlands, overlooking the Williamsburg Bridge and the famous Openlucht Binnenvaart museum

Weather in January

Entering the year, Rotterdam's weather is characterized by cold temperatures and relatively high humidity, setting the stage for possible snowfall. A cloak of clouds typically covers the city, limiting the daylight hours. A notable weather feature in January is the snowfall amounting to 8mm (0.31") over 2.1 days, representing one of only three months to see any snow at all. Winds streamline into the city, adding to the winter chill. Come prepared with warm coats and dress in layers to weather the low temperatures and brisk wind.

Temperature

Rotterdam's January weather, with an average high temperature of 5.6°C (42.1°F) and an average low temperature of 2.7°C (36.9°F), tends to be the coldest of the year.

Humidity

The average relative humidity in January is 84%.

Rainfall

In Rotterdam, during January, the rain falls for 11 days and regularly aggregates up to 17mm (0.67") of precipitation. Throughout the year, there are 130.3 rainfall days, and 205mm (8.07") of precipitation is accumulated.

Snowfall

Months with snowfall in Rotterdam are January through March, November and December. In Rotterdam, Netherlands, in January, snow falls for 2.1 days, with typically accumulated 8mm (0.31") of snow. In Rotterdam, during the entire year, snow falls for 7.4 days and aggregates up to 36mm (1.42") of snow.

Daylight

In Rotterdam, the average length of the day in January is 8h and 23min.
On the first day of the month, sunrise is at 08:49 and sunset at 16:41. On the last day of January, sunrise is at 08:23 and sunset at 17:27 CET.

Sunshine

In January, the average sunshine is 3.7h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rotterdam, Netherlands. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: In January, a regular UV index of 2 translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Updated: Jan 24, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the coldest month in Rotterdam?

January is the coldest month in Rotterdam, with an average high-temperature of 5.6°C (42.1°F) and an average low-temperature of 2.7°C (36.9°F).

Is it cold in Rotterdam during January?

The high-temperature, in January, in Rotterdam, records 5.6°C (42.1°F), while the low-temperature is 2.7°C (36.9°F).

What is the average humidity in January in Rotterdam?

In January, the average relative humidity in Rotterdam, Netherlands, is 84%.

How much does it rain in Rotterdam in January?

In Rotterdam, in January, it is raining for 11 days, with typically 17mm (0.67") of accumulated precipitation.

How many days does it snow in January in Rotterdam?

In Rotterdam, Netherlands, in January, during 2.1 snowfall days, 8mm (0.31") of snow is typically accumulated.

What is the average length of the day in January in Rotterdam?

In Rotterdam, the average day length in January is 8h and 23min.

When is the sunrise / sunset in January in Rotterdam?

On the first day of January in Rotterdam, sunrise is at 08:49 and sunset at 16:41. On the last day of the month, sunrise is at 08:23 and sunset at 17:27 CET.

How long on average sun shines in January in Rotterdam?

The average sunshine duration in January is 3.7h.

When is the lowest UV index in Rotterdam?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in January in Rotterdam?

In Rotterdam, Netherlands, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

7.2°C 45°F

5.6°C 42.1°F

6.3°C 43.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

21.3km/h 13.2mph

20.3km/h 12.6mph

20.6km/h 12.8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.2

14.4

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Rotterdam, Netherlands

Average high temperature in January: 5.6°C

The warmest months (with the highest average high temperature) are July and August (22°C).
The month with the lowest average high temperature is January (5.6°C).

Average low temperature in January: 2.7°C

The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).

Average pressure in January
Rotterdam, Netherlands

Average pressure in January: 1014.9mbar

The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).

Average wind speed in January
Rotterdam, Netherlands

Average wind speed in January: 19.3km/h

The windiest month (with the highest average wind speed) is December (20.2km/h).
The calmest months (with the lowest average wind speed) are July and August (13.6km/h).

Average humidity in January
Rotterdam, Netherlands

Average humidity in January: 84%

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is April (73%).

Average rainfall in January
Rotterdam, Netherlands

Average rainfall in January: 17mm

The wettest month (with the highest rainfall) is June (24mm).
The driest month (with the least rainfall) is April (9mm).

Average rainfall days in January
Rotterdam, Netherlands

Average rainfall days in January: 11 days

The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is February (8.5 days).

Average snowfall in January
Rotterdam, Netherlands

Average snowfall in January: 8mm

The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in January
Rotterdam, Netherlands

Average snowfall days in January: 2.1 days

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Rotterdam, Netherlands

Average daylight in January: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

Average sunshine in January: 3h and 4min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).

Average sunshine days in January
Rotterdam, Netherlands

Average sunshine days in January: 16.2 days

The month with the most sunshine days is April (17.5 days).
The month with the least sunshine days is July (13 days).

Average UV index in January
Rotterdam, Netherlands

Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in January
Rotterdam, Netherlands

Average cloud cover in January: 63

The month with the most cloud cover is December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 40).

Average visibility in January
Rotterdam, Netherlands

Average visibility in January: 9km

The months with the highest visibility are April, May, June and August (10km).
The months with the lowest visibility are January, February, March, July, September, October, November and December (9km).

January weather forecast
Rotterdam, Netherlands

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