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August Weather in Altdorf, Switzerland

Last updated: August 27, 2025

In Altdorf, Switzerland, the average temperature in August is a mild 15°C (59°F), with minimums dipping to 5°C (41°F) and maximums peaking at 27°C (80°F). Expect around 231 mm (9.1 in) of precipitation over approximately 19 days, contributing to a high average humidity of 80%.

August Temperature in Altdorf

In August in Altdorf, the average temperature is 15°C (59°F). Maximums can reach 27°C (80°F), while minimums can dip as low as 5°C (41°F). This moderate climate makes Altdorf an ideal destination for travelers seeking to explore comfortably.

August Weather in Altdorf: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Altdorf, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altdorf, August typically has an average temperature of 15°C (59°F), with highs reaching up to 27°C (80°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec252934414757595952453528
Data source: Temperature data for Altdorf 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.

August Precipitation in Altdorf

In Altdorf in August, the precipitation amount is 231 mm (9.1 in), distributed over a total of 19 days.

August Precipitation Trends in Altdorf

The chart displays monthly precipitation patterns in Altdorf, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Altdorf, August typically receives around 231 mm (9.1 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec154108136114190229208231168162102190
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Altdorf

In Altdorf in August, humidity is 80%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making outdoor activities slightly uncomfortable and necessitating frequent breaks to stay hydrated.

August Average Humidity in Altdorf

This chart illustrates the average monthly humidity levels in Altdorf, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Altdorf is approximately 80%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Altdorf

In Altdorf in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Altdorf.

Maximum UV Index Levels in Altdorf for August

The chart shows the monthly maximum UV Index (UVI) for Altdorf in August, 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 August, the maximum UV index in Altdorf typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357810986432
Data source: Altdorf August 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 August Weather in Altdorf Compares to Other Months

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

This table compares monthly weather conditions in Altdorf, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)154 mm (6.1 inches)92%low
February Weather-2°C (30°F)108 mm (4.2 inches)89%moderate
March Weather1°C (34°F)136 mm (5.3 inches)87%moderate
April Weather5°C (41°F)114 mm (4.5 inches)84%high
May Weather8°C (48°F)190 mm (7.5 inches)80%very high
June Weather14°C (57°F)229 mm (9.0 inches)82%very high
July Weather15°C (59°F)208 mm (8.2 inches)83%very high
August Weather15°C (59°F)231 mm (9.1 inches)80%very high
September Weather11°C (52°F)168 mm (6.6 inches)83%high
October Weather7°C (45°F)162 mm (6.4 inches)90%moderate
November Weather2°C (35°F)102 mm (4.0 inches)88%moderate
December Weather-2°C (29°F)190 mm (7.5 inches)90%low

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