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September Weather in Altenberg, Austria

Last updated: August 22, 2025

In Altenberg, Austria, the average temperature in September hovers around 17°C (62°F). However, temperatures can range from a chilly 2°C (35°F) to a warm 32°C (89°F). Expect 77 mm (3.0 in) of precipitation over approximately 10 days, with an average humidity of 75%, making for a comfortably damp climate.

September Temperature in Altenberg

In September in Altenberg, the average temperature is 17°C (62°F). The maximum can reach 32°C (89°F) and the minimum can be as low as 2°C (35°F). Be sure to pack layers to comfortably enjoy the fluctuating temperatures during your travels!

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

The chart illustrates September temperature patterns in Altenberg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altenberg, September typically has an average temperature of 17°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec343843525969707162534337
Data source: Temperature data for Altenberg 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 Altenberg

In Altenberg in September, the total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 days.

September Precipitation Trends in Altenberg

The chart displays monthly precipitation patterns in Altenberg, 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 Altenberg, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec363137398470747677474657
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Altenberg

In Altenberg in September, humidity is 75%. With an average temperature of 17°C (62°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and a bit sluggish as they navigate the sights.

September Average Humidity in Altenberg

This chart illustrates the average monthly humidity levels in Altenberg, 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 Altenberg is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%87%85%78%74%77%76%76%75%85%90%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Altenberg

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

Maximum UV Index Levels in Altenberg for September

The chart shows the monthly maximum UV Index (UVI) for Altenberg 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 Altenberg typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235688876421
Data source: Altenberg 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 Altenberg Compares to Other Months

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

This table compares monthly weather conditions in Altenberg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)36 mm (1.4 inches)90%low
February Weather3°C (38°F)31 mm (1.2 inches)87%moderate
March Weather6°C (43°F)37 mm (1.5 inches)85%moderate
April Weather11°C (52°F)38 mm (1.5 inches)78%high
May Weather15°C (59°F)84 mm (3.3 inches)73%very high
June Weather21°C (70°F)70 mm (2.8 inches)77%very high
July Weather21°C (71°F)74 mm (2.9 inches)76%very high
August Weather22°C (71°F)76 mm (3.0 inches)76%high
September Weather17°C (62°F)77 mm (3.0 inches)75%high
October Weather12°C (53°F)47 mm (1.8 inches)85%moderate
November Weather6°C (43°F)46 mm (1.8 inches)90%low
December Weather3°C (37°F)57 mm (2.2 inches)91%low

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