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September Weather in Rettenberg, Germany

Last updated: August 23, 2025

In September, the average temperature in Rettenberg, Germany hovers around 11°C (52°F). Expect to chill with minimums reaching -1°C (31°F) and warm up to 24°C (75°F). During this month, precipitation averages 150 mm (5.9 in) over 16 days, contributing to a high average humidity of 83%. Get ready for a mix of weather!

September Temperature in Rettenberg

In September in Rettenberg, the average temperature is 11°C (52°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -1°C (31°F). It's a great time to pack layers, as the weather can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Rettenberg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rettenberg, September typically has an average temperature of 11°C (52°F), with highs reaching up to 24°C (75°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec273135424858595952453629
Data source: Temperature data for Rettenberg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Rettenberg

In Rettenberg in September, the precipitation amount is 150 mm (5.9 in) spread over 16 days.

September Precipitation Trends in Rettenberg

The chart displays monthly precipitation patterns in Rettenberg, 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 Rettenberg, September typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec1421101309820018521121115013386165
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rettenberg

In Rettenberg in September humidity is 83%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leading travelers to seek shelter indoors or to dress in layered clothing to stay warm while exploring the area.

September Average Humidity in Rettenberg

This chart illustrates the average monthly humidity levels in Rettenberg, 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 Rettenberg is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%89%86%83%78%79%82%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rettenberg

In Rettenberg in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Rettenberg, you can refer to this Hourly UV Index in Rettenberg.

Maximum UV Index Levels in Rettenberg for September

The chart shows the monthly maximum UV Index (UVI) for Rettenberg 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 Rettenberg typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789986432
Data source: Rettenberg 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 Rettenberg Compares to Other Months

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

This table compares monthly weather conditions in Rettenberg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)142 mm (5.6 inches)93%low
February Weather0°C (31°F)110 mm (4.3 inches)89%moderate
March Weather2°C (36°F)130 mm (5.1 inches)86%moderate
April Weather6°C (42°F)98 mm (3.9 inches)83%high
May Weather9°C (49°F)199 mm (7.9 inches)78%very high
June Weather14°C (58°F)185 mm (7.3 inches)79%very high
July Weather15°C (60°F)211 mm (8.3 inches)82%very high
August Weather15°C (60°F)211 mm (8.3 inches)80%very high
September Weather11°C (52°F)150 mm (5.9 inches)83%high
October Weather7°C (45°F)133 mm (5.2 inches)90%moderate
November Weather2°C (36°F)86 mm (3.4 inches)89%moderate
December Weather-2°C (29°F)165 mm (6.5 inches)90%low

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