September Weather in Idstein, Germany

Last updated: August 23, 2025

In Idstein, Germany, the average temperature in September is a comfortable 15°C (59°F). However, temperatures can vary, with minimums dipping to 3°C (37°F) and maximums rising to a warm 32°C (90°F). Expect about 51 mm (2.0 in) of precipitation spread over 8 days, accompanied by a notable average humidity of 82%.

September Temperature in Idstein

In September in Idstein, the average temperature is 15°C (59°F). Maximums can reach 32°C (90°F) and minimums can be as low as 3°C (37°F). It’s advisable to pack layers and be prepared for both warm and cool weather during your travels.

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

The chart illustrates September temperature patterns in Idstein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Idstein, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Idstein

In Idstein in September, the total precipitation amount is 51 mm (2.0 in), spread over a duration of 8 days.

September Precipitation Trends in Idstein

The chart displays monthly precipitation patterns in Idstein, 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 Idstein, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 8 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 Idstein

In Idstein in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

September Average Humidity in Idstein

This chart illustrates the average monthly humidity levels in Idstein, 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 Idstein is approximately 82%, 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 Idstein

In Idstein 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 Idstein.

Maximum UV Index Levels in Idstein for September

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

Data source: Idstein 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 Idstein Compares to Other Months

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

This table compares monthly weather conditions in Idstein, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	64 mm (2.5 inches)	92%	low
February Weather	3°C (38°F)	57 mm (2.3 inches)	90%	low
March Weather	6°C (43°F)	70 mm (2.8 inches)	87%	moderate
April Weather	10°C (49°F)	40 mm (1.6 inches)	83%	moderate
May Weather	13°C (56°F)	81 mm (3.2 inches)	76%	high
June Weather	18°C (66°F)	88 mm (3.5 inches)	74%	very high
July Weather	19°C (67°F)	73 mm (2.9 inches)	74%	very high
August Weather	19°C (67°F)	73 mm (2.9 inches)	75%	high
September Weather	15°C (59°F)	51 mm (2.0 inches)	82%	moderate
October Weather	11°C (51°F)	58 mm (2.3 inches)	88%	moderate
November Weather	5°C (42°F)	50 mm (2.0 inches)	90%	low
December Weather	3°C (38°F)	99 mm (3.9 inches)	92%	low