Cold Cologne: Germany's December Weather

If you're planning a trip to Cologne, Germany in December, you can expect cold temperatures and rainfall. During the day, the temperature hovers around 5°C to 7°C, while at night it drops to between 0.4°C and 2°C. With such low temperatures, you'll need to pack warm clothes for your trip. Cologne typically receives moderate rainfall in December, with an average of 71mm to 99mm of precipitation throughout the month. The short daylight hours, averaging around 8 hours, create a cosy atmosphere for the festive season. So if you're visiting Cologne in December, be prepared for chilly weather and pack an umbrella!

Average high and low temperatures

In December, the average high and low temperatures in Cologne, Germany, are 6°C (42°F) and 0°C (32°F) respectively. These temperatures are significantly lower than the average temperatures in July, which is the hottest month in Cologne, with highs of 25°C (77°F) and lows of 14°C (56°F).

The temperature in Cologne in December can be described as cold, and those visiting or spending time outside in the city during this month are advised to dress warmly. The average daily high temperature in December is 42°F (6°C), while the average daily low is 33°F (0°C). This is a slight decrease from November, when the average high temperature is 49.1°F (9.5°C).

The coldest month in Cologne is February, with highs of 6°C (42°F) and lows of -2°C (29°F). December is, therefore, the second-coldest month in the city, with temperatures rarely falling below 19°F (-7°C) or exceeding 55°F (13°C). The average temperature in December ranges from a high of 5.9°C (42.6°F) to a low of 0.4°C (32.7°F).

December in Cologne experiences a gentle decline in temperature, with the city decked up for Christmas, creating a winter wonderland filled with lights and festivities. The short daylight hours of just 8 hours, the shortest of the year, add to the festive atmosphere, making it a perfect time to enjoy the warm fireplaces and the city's unmatched winter charm.

Rainfall and snow

On average, there is a 40% chance of rain or snow on any given day in December in Cologne, with 0.28 inches (7.1 mm) of precipitation. However, it is important to note that December is the wettest month in the city, with a typical day having a higher chance of precipitation than any other month.

The high amount of rainfall and snow in December contributes to the winter wonderland atmosphere that the city is known for during the Christmas season. With short daylight hours and an average of only 1.3 hours of sunshine per day, the festive lights and warm fireplaces become a charming and inviting part of the city's December landscape.

The temperature in Cologne during December ranges from a high of 42°F (6°C) to a low of 32.7°F (0°C), with an average high of 5.9°C (42.6°F) and an average low of 0.4°C (32.7°F). These temperatures are a significant drop from the previous month, November, which has an average high of 9.5°C (49.1°F).

December in Cologne is characterised by cold temperatures, high humidity, and a good chance of rain or snow on any given day. The combination of these factors creates the perfect environment for a cosy and festive winter season.

Sunshine and UV index

In December, Cologne experiences a daily maximum UV index of 1. This is considered a low health risk from exposure to the sun's UV radiation. A UV Index value of 2 and below symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.

Although extended exposure to the sun is typically not a concern for most people, it is still crucial to shield children, infants, and those with sensitive skin from the sun. It is recommended to minimize direct exposure to the sun during midday when its radiation is at its peak. Sunglasses that offer protection from UVA and UVB rays are also advised to reduce the risk of solar eye damage.

In contrast, the UV index in May is significantly higher, with an average daily maximum of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation. During this time, it is recommended to avoid direct sun exposure and stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most intense. Fair-skinned individuals should be particularly cautious as they can burn in under 20 minutes.

Daylight hours

In December, Cologne, Germany, experiences its shortest days of the year, with an average of 8 hours and 1 minute of daylight. On the first day of the month, sunrise is at 08:13 and sunset at 16:29. On the last day of the month, sunrise is at 08:34 and sunset at 16:35.

The month sees the winter solstice, which in 2024 falls on 21 December. The solstice is the shortest day of the year in most locations north of the equator. In Cologne, the day is 8 hours and 37 minutes shorter than the June solstice. The earliest sunset is on 12 December, and the latest sunrise is on 30 December.

The average sunshine duration in December is just 1.3 hours, making it the month with the least sunshine in Cologne.

Humidity and wind speed

In December, Cologne is very humid, with an average relative humidity of 95%. This is the highest relative humidity the city experiences all year, with the least humid month being July, at 63% relative humidity. The average annual relative humidity in Cologne is 75.5%.

In December, the wind in Cologne blows at an average speed of 18.7 mph (30.0 kph). December is the windiest month in the city, with the calmest month being July, which has an average wind speed of 12.3 mph (19.7 kph).

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