December weather forecastRotterdam, Netherlands
December
Weather in December
By December, winter has cemented its place in Rotterdam, echoed in the shortened daylight hours and cooler, rainy days. As the year draws to a close, the city is mantled by cloud coverage, further reducing the limited sunlight hours. Alongside the cool air, December sees the city's second highest amount of snowfall, measuring 7mm (0.28"). The wind speed amplifies the chill factor, reaching its zenith for the year. Despite the winter spell, the festive spirit of December creates a vibrant tableau against the cool backdrop, characterizing Rotterdam's vibrant end-of-year celebrations.Temperature
Rotterdam marks the onset of December with an average high-temperature of a frosty 7.2°C (45°F), a subtle shift from November's 10°C (50°F). Rotterdam registers a steady nighttime temperature averaging a wintry 4.2°C (39.6°F) throughout December.Humidity
With an average relative humidity of 85%, December is the most humid month.Rainfall
In Rotterdam, in December, during 11 rainfall days, 20mm (0.79") of precipitation is typically accumulated. In Rotterdam, during the entire year, the rain falls for 130.3 days and collects up to 205mm (8.07") of precipitation.Snowfall
January through March, November and December are months with snowfall in Rotterdam. In December, in Rotterdam, it is snowing for 1.9 days. Throughout December, 7mm (0.28") of snow is accumulated. In Rotterdam, during the entire year, snow falls for 7.4 days and aggregates up to 36mm (1.42") of snow.Daylight
With an average of 7h and 54min of daylight, December has the shortest days of the year in Rotterdam.On the first day of December in Rotterdam, sunrise is at 08:27 and sunset at 16:34. On the last day of the month, sunrise is at 08:49 and sunset at 16:40 CET.
Sunshine
The month with the least sunshine in Rotterdam is December, with an average of 3.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. To protect against the Sun's most potent rays, avoid direct exposure around midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rotterdam, Netherlands
- Average high temperature in December: 7.2°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 December: 4.2°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 December
Rotterdam, Netherlands
- Average pressure in December: 1014.7mbar
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 December
Rotterdam, Netherlands
- Average wind speed in December: 20.2km/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 December
Rotterdam, Netherlands
- Average humidity in December: 85%
The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Rotterdam, Netherlands
- Average rainfall in December: 20mm
The wettest month (with the highest rainfall) is June (24mm).
The driest month (with the least rainfall) is April (9mm).
Average rainfall days in December
Rotterdam, Netherlands
- Average rainfall days in December: 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 December
Rotterdam, Netherlands
- Average snowfall in December: 7mm
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 December
Rotterdam, Netherlands
- Average snowfall days in December: 1.9 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 December /
Average sunshine in December
Rotterdam, Netherlands
- Average daylight in December: 7h and 54min
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 December: 3h and 30min
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 December
Rotterdam, Netherlands
- Average sunshine days in December: 15 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 December
Rotterdam, Netherlands
- Average UV index in December: 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 December
Rotterdam, Netherlands
- Average cloud cover in December: 66
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 December
Rotterdam, Netherlands
- Average visibility in December: 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).
