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August Weather in Sarnen, Switzerland

Last updated: August 27, 2025

In August, the average temperature in Sarnen, Switzerland hovers around 18°C (64°F), with a minimum of 8°C (46°F) and a maximum reaching 30°C (87°F). Expect 193 mm (7.6 in) of precipitation spread over 16 days, while the air remains notably humid with an average humidity level of 80%.

August Temperature in Sarnen

In August in Sarnen, the average temperature is 18°C (64°F). The maximum can reach 30°C (87°F), while the minimum can dip to as low as 8°C (46°F). This makes Sarnen an ideal destination for travelers seeking mild weather and comfortable conditions for outdoor activities.

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

The chart illustrates August temperature patterns in Sarnen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sarnen, August typically has an average temperature of 18°C (64°F), with highs reaching up to 30°C (87°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec323640465261646457504135
Data source: Temperature data for Sarnen 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 Sarnen

In Sarnen in August, the total precipitation amount is 193 mm (7.6 in), spread over a period of 16 days.

August Precipitation Trends in Sarnen

The chart displays monthly precipitation patterns in Sarnen, 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 Sarnen, August typically receives around 193 mm (7.6 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec13810712610217220219919313815897169
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sarnen

In Sarnen in August humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

August Average Humidity in Sarnen

This chart illustrates the average monthly humidity levels in Sarnen, 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 Sarnen 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 Sarnen

In Sarnen 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 Sarnen.

Maximum UV Index Levels in Sarnen for August

The chart shows the monthly maximum UV Index (UVI) for Sarnen 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 Sarnen typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986432
Data source: Sarnen 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 Sarnen Compares to Other Months

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

This table compares monthly weather conditions in Sarnen, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)138 mm (5.4 inches)92%low
February Weather2°C (36°F)107 mm (4.2 inches)89%moderate
March Weather4°C (40°F)126 mm (5.0 inches)87%moderate
April Weather8°C (46°F)102 mm (4.0 inches)84%high
May Weather11°C (52°F)172 mm (6.8 inches)80%very high
June Weather16°C (62°F)202 mm (8.0 inches)82%very high
July Weather18°C (64°F)199 mm (7.8 inches)83%very high
August Weather18°C (64°F)193 mm (7.6 inches)80%very high
September Weather14°C (58°F)138 mm (5.4 inches)83%high
October Weather10°C (50°F)158 mm (6.2 inches)90%moderate
November Weather5°C (41°F)97 mm (3.8 inches)88%moderate
December Weather2°C (35°F)169 mm (6.6 inches)90%low

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