December Weather in Cologne, United States

Last updated: June 24, 2025

In Cologne, United States, the average temperature in December hovers around -5°C (24°F). Expect the minimum to drop as low as -25°C (-13°F), while the maximum can reach a mild 13°C (56°F). During this month, anticipate 44 mm (1.7 in) of precipitation spread across approximately 6 days, with an average humidity level of 84%—perfect for cozy indoor activities!

December Temperature in Cologne

In December in Cologne, the average temperature is -5°C (24°F). The maximum can reach 13°C (56°F), while the minimum can drop as low as -25°C (-13°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both chilly nights and potentially milder days.

December Weather in Cologne: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Cologne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cologne, December typically has an average temperature of -5°C (24°F), with highs reaching up to 13°C (56°F) and lows dropping to around -25°C (-13°F).

Data source: Temperature data for Cologne generated using information from the Copernicus Climate Change Service.

December Precipitation in Cologne

In Cologne in December, the total precipitation amount is 44 mm (1.7 in) spread over 6 days.

December Precipitation Trends in Cologne

The chart displays monthly precipitation patterns in Cologne, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Cologne, December typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Cologne

In Cologne in December, humidity is 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.

December Average Humidity in Cologne

This chart illustrates the average monthly humidity levels in Cologne, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Cologne is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cologne

In Cologne in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Cologne, you can visit Hourly UV Index in Cologne.

Maximum UV Index Levels in Cologne for December

The chart shows the monthly maximum UV Index (UVI) for Cologne in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Cologne typically reaches 2, which falls under the low exposure category.

Data source: Cologne December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Cologne Compares to Other Months

Weather in Cologne varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cologne, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Cologne, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (17°F)	29 mm (1.1 inches)	87%	low
February Weather	-9°C (17°F)	31 mm (1.2 inches)	90%	moderate
March Weather	1°C (33°F)	58 mm (2.3 inches)	85%	moderate
April Weather	6°C (43°F)	81 mm (3.2 inches)	84%	high
May Weather	15°C (59°F)	119 mm (4.7 inches)	78%	very high
June Weather	22°C (72°F)	90 mm (3.6 inches)	80%	very high
July Weather	24°C (75°F)	105 mm (4.1 inches)	81%	very high
August Weather	21°C (71°F)	145 mm (5.7 inches)	81%	very high
September Weather	18°C (64°F)	117 mm (4.6 inches)	81%	high
October Weather	9°C (49°F)	92 mm (3.6 inches)	84%	moderate
November Weather	1°C (34°F)	32 mm (1.2 inches)	88%	moderate
December Weather	-5°C (24°F)	44 mm (1.7 inches)	84%	low