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September Weather in Au, Germany

Last updated: August 23, 2025

In Au, Germany, the average temperature in September reaches a comfortable 16°C (61°F). However, temperatures can vary significantly, with a minimum of 3°C (38°F) and potentially soaring up to a maximum of 31°C (88°F). Expect 57 mm (2.3 in) of precipitation spread over approximately 10 days, and keep in mind the average humidity is quite high at 83%.

September Temperature in Au

In September in Au, the average temperature is 16°C (61°F). The maximum can reach 31°C (88°F), and the minimum can be as low as 3°C (38°F). This makes it a great time for travelers to experience a pleasant mix of warm days and cooler nights.

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

The chart illustrates September temperature patterns in Au, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Au, September typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (88°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec343943505766696861524238
Data source: Temperature data for Au 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 Au

In Au in September, the precipitation amount is 57 mm (2.3 in) over the course of 10 days.

September Precipitation Trends in Au

The chart displays monthly precipitation patterns in Au, 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 Au, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1058897541141018474578472136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Au

In Au in September, humidity is 83%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit sticky and potentially uncomfortable as you navigate through the sights.

September Average Humidity in Au

This chart illustrates the average monthly humidity levels in Au, 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 Au is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Au

In Au 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 Au, you can refer to this Hourly UV Index in Au.

Maximum UV Index Levels in Au for September

The chart shows the monthly maximum UV Index (UVI) for Au 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 Au typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Au 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 Au Compares to Other Months

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

This table compares monthly weather conditions in Au, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)105 mm (4.1 inches)92%low
February Weather4°C (39°F)88 mm (3.5 inches)89%moderate
March Weather6°C (43°F)96 mm (3.8 inches)87%moderate
April Weather10°C (51°F)54 mm (2.1 inches)84%high
May Weather14°C (57°F)114 mm (4.5 inches)80%very high
June Weather19°C (67°F)101 mm (4.0 inches)82%very high
July Weather20°C (69°F)84 mm (3.3 inches)83%very high
August Weather20°C (68°F)74 mm (2.9 inches)80%very high
September Weather16°C (61°F)57 mm (2.3 inches)83%high
October Weather11°C (52°F)84 mm (3.3 inches)90%moderate
November Weather6°C (42°F)72 mm (2.8 inches)88%low
December Weather3°C (38°F)136 mm (5.4 inches)90%low

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