September Weather in Gronau, Germany

Last updated: August 23, 2025

In Gronau, Germany, the average temperature in September hovers around 15°C (59°F). Temperature extremes can vary significantly, with a minimum of 3°C (37°F) and a maximum reaching 32°C (89°F). Expect precipitation of about 63 mm (2.5 in) over 10 days, coupled with an average humidity of 83%. Stay prepared for a mix of weather this month!

September Temperature in Gronau

In September in Gronau, the average temperature is 15°C (59°F). Maximums can reach 32°C (89°F), and minimums can be as low as 3°C (37°F). This makes it a great time for travelers to enjoy a mix of warm days and cooler evenings, perfect for outdoor adventures and sightseeing.

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

The chart illustrates September temperature patterns in Gronau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gronau, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (89°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Gronau

In Gronau in September, the precipitation amount is 63 mm (2.5 in) over a span of 10 days.

September Precipitation Trends in Gronau

The chart displays monthly precipitation patterns in Gronau, 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 Gronau, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 10 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 Gronau

In Gronau in September humidity is 83%. With an average temperature of 15°C (59°F), this humidity feels like a cozy, damp embrace that can be quite stifling for traveling, making even short walks feel more exhausting than they should, and prompting a need for frequent breaks in shaded or air-conditioned areas.

September Average Humidity in Gronau

This chart illustrates the average monthly humidity levels in Gronau, 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 Gronau is approximately 83%, 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 Gronau

In Gronau in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Gronau.

Maximum UV Index Levels in Gronau for September

The chart shows the monthly maximum UV Index (UVI) for Gronau 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 Gronau typically reaches 5, which falls under the moderate exposure category.

Data source: Gronau 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 Gronau Compares to Other Months

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

This table compares monthly weather conditions in Gronau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	67 mm (2.6 inches)	88%	low
February Weather	4°C (40°F)	75 mm (2.9 inches)	88%	low
March Weather	6°C (44°F)	76 mm (3.0 inches)	86%	moderate
April Weather	10°C (50°F)	36 mm (1.4 inches)	84%	moderate
May Weather	14°C (57°F)	65 mm (2.5 inches)	80%	high
June Weather	19°C (66°F)	65 mm (2.6 inches)	75%	very high
July Weather	19°C (66°F)	74 mm (2.9 inches)	75%	very high
August Weather	19°C (66°F)	76 mm (3.0 inches)	75%	high
September Weather	15°C (59°F)	63 mm (2.5 inches)	83%	moderate
October Weather	12°C (54°F)	86 mm (3.4 inches)	86%	moderate
November Weather	7°C (45°F)	54 mm (2.1 inches)	87%	low
December Weather	5°C (41°F)	91 mm (3.6 inches)	86%	low