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September Weather in Viernau, Germany

Last updated: August 23, 2025

In Viernau, Germany, the average temperature in September is a mild 14°C (57°F), with a minimum of 0°C (33°F) and a maximum reaching 29°C (85°F). Expect about 51 mm (2.0 in) of precipitation over 9 days, contributing to an average humidity of 83%.

September Temperature in Viernau

In September in Viernau, the average temperature is 14°C (57°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as 0°C (33°F). It's advisable to pack layers for your travel, as the weather can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Viernau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viernau, September typically has an average temperature of 14°C (57°F), with highs reaching up to 29°C (85°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec323439465363646456494035
Data source: Temperature data for Viernau 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 Viernau

In Viernau in September, the total precipitation amount is 51 mm (2.0 in) spread over 9 days.

September Precipitation Trends in Viernau

The chart displays monthly precipitation patterns in Viernau, 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 Viernau, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec686075459792859351674881
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Viernau

In Viernau in September, humidity is 83%. With an average temperature of 14°C (57°F), this humidity feels like you're stepping into a warm, damp embrace that can make outdoor activities quite uncomfortable, often leaving you sweaty and exhausted if you're not prepared with plenty of water and breathable clothing.

September Average Humidity in Viernau

This chart illustrates the average monthly humidity levels in Viernau, 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 Viernau is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%88%83%75%79%79%79%83%87%90%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Viernau

In Viernau 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 Viernau.

Maximum UV Index Levels in Viernau for September

The chart shows the monthly maximum UV Index (UVI) for Viernau 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 Viernau typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578875421
Data source: Viernau 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 Viernau Compares to Other Months

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

This table compares monthly weather conditions in Viernau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)68 mm (2.7 inches)91%low
February Weather1°C (34°F)60 mm (2.4 inches)90%low
March Weather4°C (39°F)75 mm (2.9 inches)88%moderate
April Weather8°C (46°F)45 mm (1.8 inches)83%moderate
May Weather12°C (54°F)96 mm (3.8 inches)75%high
June Weather17°C (63°F)92 mm (3.6 inches)79%very high
July Weather18°C (64°F)85 mm (3.4 inches)79%very high
August Weather18°C (64°F)93 mm (3.6 inches)79%high
September Weather14°C (57°F)51 mm (2.0 inches)83%moderate
October Weather10°C (49°F)67 mm (2.6 inches)87%moderate
November Weather4°C (40°F)48 mm (1.9 inches)90%low
December Weather2°C (35°F)81 mm (3.2 inches)92%low

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