May Weather in Cologne, United States

Last updated: June 24, 2025

In May, the average temperature in Cologne, United States hovers around 15°C (59°F). You can expect temperatures to range from a chilly 0°C (32°F) to a warm 36°C (96°F). Be prepared for about 119 mm (4.7 in) of precipitation over 12 days, and with an average humidity of 78%, you'll feel that tropical touch in the air!

May Temperature in Cologne

In May in Cologne, the average temperature is 15°C (59°F), with maximums reaching up to 36°C (96°F) and minimums dropping as low as 0°C (32°F). It’s advisable to pack for both warm days and chilly nights when traveling during this time.

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

The chart illustrates May 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, May typically has an average temperature of 15°C (59°F), with highs reaching up to 36°C (96°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Cologne

In Cologne in May, the total precipitation amount is 119 mm (4.7 in), falling over a span of 12 days.

May Precipitation Trends in Cologne

The chart displays monthly precipitation patterns in Cologne, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Cologne, May typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Cologne

In Cologne in May, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

May Average Humidity in Cologne

This chart illustrates the average monthly humidity levels in Cologne, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Cologne is approximately 78%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Cologne

In Cologne in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Cologne.

Maximum UV Index Levels in Cologne for May

The chart shows the monthly maximum UV Index (UVI) for Cologne in May, 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 May, the maximum UV index in Cologne typically reaches 9, which falls under the very high exposure category.

Data source: Cologne May 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 May 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 May’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 May’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