September Weather in Cologne, France

Last updated: August 23, 2025

In September, the average temperature in Cologne, France hovers around 20°C (68°F), offering a pleasant climate. However, expect a wide range, with minimum temperatures dipping to 7°C (45°F) and a maximum soaring up to 36°C (96°F). On average, the region experiences 58 mm (2.3 in) of precipitation over 9 days, along with a relative humidity of 73%, making it a unique month for weather enthusiasts.

September Temperature in Cologne

In September, in Cologne, the average temperature is 20°C (68°F). The maximum can reach 36°C (96°F), while the minimum can drop to as low as 7°C (45°F). This variation makes it a great time for travelers to experience a pleasant climate while exploring the local attractions.

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

The chart illustrates September 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, September typically has an average temperature of 20°C (68°F), with highs reaching up to 36°C (96°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Cologne

In Cologne in September, the precipitation amount is 58 mm (2.3 in) spread over 9 days.

September Precipitation Trends in Cologne

The chart displays monthly precipitation patterns in Cologne, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Cologne, September typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Cologne

In Cologne in September, humidity is 73%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky, yet the atmosphere remains pleasant for leisurely strolls and sightseeing.

September Average Humidity in Cologne

This chart illustrates the average monthly humidity levels in Cologne, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Cologne is approximately 73%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Cologne

In Cologne in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Cologne.

Maximum UV Index Levels in Cologne for September

The chart shows the monthly maximum UV Index (UVI) for Cologne in September, 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 September, the maximum UV index in Cologne typically reaches 7, which falls under the high exposure category.

Data source: Cologne September 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 September 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 September’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 September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	50 mm (2.0 inches)	87%	low
February Weather	9°C (48°F)	57 mm (2.2 inches)	83%	moderate
March Weather	10°C (51°F)	59 mm (2.3 inches)	80%	high
April Weather	13°C (56°F)	65 mm (2.5 inches)	77%	high
May Weather	17°C (63°F)	94 mm (3.7 inches)	75%	very high
June Weather	21°C (70°F)	89 mm (3.5 inches)	74%	very high
July Weather	23°C (74°F)	68 mm (2.7 inches)	72%	very high
August Weather	23°C (74°F)	57 mm (2.2 inches)	70%	very high
September Weather	20°C (68°F)	58 mm (2.3 inches)	73%	high
October Weather	15°C (59°F)	63 mm (2.5 inches)	82%	moderate
November Weather	10°C (50°F)	73 mm (2.9 inches)	87%	moderate
December Weather	8°C (47°F)	97 mm (3.8 inches)	88%	low