January Weather in Cologne, United States

Last updated: June 24, 2025

In Cologne, United States, the average temperature for January hovers around -9°C (17°F). Be prepared for a chill, as temperatures can dive to a frigid -34°C (-29°F) or climb to a maximum of 6°C (44°F). During this month, expect approximately 29 mm (1.1 in) of precipitation spread over 5 days, with an average humidity level at a brisk 87%.

January Temperature in Cologne

In January in Cologne, the average temperature is -9°C (17°F), with maximums possibly reaching 6°C (44°F) and minimums dropping as low as -34°C (-29°F). Travelers should prepare for extreme cold and varying conditions during this time.

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

The chart illustrates January 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, January typically has an average temperature of -9°C (17°F), with highs reaching up to 6°C (44°F) and lows dropping to around -34°C (-29°F).

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

January Precipitation in Cologne

In Cologne in January, the total precipitation amount is 29 mm (1.1 in) recorded over a span of 5 days.

January Precipitation Trends in Cologne

The chart displays monthly precipitation patterns in Cologne, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Cologne, January typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Cologne

In Cologne in January humidity is 87%. With an average temperature of -9°C (17°F), this humidity feels like an icy blanket wrapping around you, making travel particularly challenging as the cold air combines with the moisture to create a biting chill that seeps into your bones.

January Average Humidity in Cologne

This chart illustrates the average monthly humidity levels in Cologne, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Cologne is approximately 87%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Cologne

In Cologne in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Cologne in January, 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 January, the maximum UV index in Cologne typically reaches 2, which falls under the low exposure category.

Data source: Cologne January 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 January 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 January’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 January’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