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September Weather in Rettenstein, Austria

Last updated: August 22, 2025

In September, the average temperature in Rettenstein, Austria hovers around 9°C (49°F). However, be prepared for a wide range, as temperatures can dip as low as -10°C (15°F) and soar up to 24°C (76°F). With an average precipitation of 151 mm (5.9 in) spread over 16 days, you might want to carry an umbrella. The atmosphere is also quite humid, with an average humidity of 74%, making it essential to dress comfortably for the weather.

September Temperature in Rettenstein

In September in Rettenstein, the average temperature is 9°C (49°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -10°C (15°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for comfort.

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

The chart illustrates September temperature patterns in Rettenstein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rettenstein, September typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (76°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec212530384555565749413224
Data source: Temperature data for Rettenstein 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 Rettenstein

In Rettenstein in September, the precipitation amount is 151 mm (5.9 in) over a span of 16 days.

September Precipitation Trends in Rettenstein

The chart displays monthly precipitation patterns in Rettenstein, 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 Rettenstein, September typically receives around 151 mm (5.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec958910091176135167206151124116146
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rettenstein

In Rettenstein in September humidity is 74%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace that can make outdoor activities somewhat uncomfortable; travelers may find themselves needing to dress in layers to stay warm while also coping with the dampness in the air.

September Average Humidity in Rettenstein

This chart illustrates the average monthly humidity levels in Rettenstein, 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 Rettenstein is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%82%79%74%75%74%69%74%88%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rettenstein

In Rettenstein in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Rettenstein.

Maximum UV Index Levels in Rettenstein for September

The chart shows the monthly maximum UV Index (UVI) for Rettenstein 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 Rettenstein typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Rettenstein 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 Rettenstein Compares to Other Months

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

This table compares monthly weather conditions in Rettenstein, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)95 mm (3.7 inches)91%low
February Weather-4°C (26°F)89 mm (3.5 inches)87%moderate
March Weather-1°C (31°F)100 mm (3.9 inches)82%high
April Weather3°C (38°F)90 mm (3.6 inches)79%very high
May Weather7°C (45°F)176 mm (6.9 inches)74%very high
June Weather13°C (56°F)135 mm (5.3 inches)75%very high
July Weather14°C (57°F)167 mm (6.6 inches)74%very high
August Weather14°C (57°F)206 mm (8.1 inches)68%very high
September Weather9°C (49°F)151 mm (5.9 inches)74%high
October Weather5°C (42°F)124 mm (4.9 inches)88%moderate
November Weather0°C (33°F)116 mm (4.6 inches)90%moderate
December Weather-5°C (24°F)146 mm (5.7 inches)89%low

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