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September Weather in Les Clees, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Les Clees, Switzerland hovers around 15°C (58°F). Minimum temperatures can drop to 4°C (39°F), while the maximum can reach a pleasant 27°C (81°F). Expect around 92 mm (3.6 in) of precipitation spread over 12 days, with the air feeling quite humid at an average of 81%. Prepare accordingly for a mix of warmth and wet days!

September Temperature in Les Clees

In September in Les Clees, the average temperature is 15°C (58°F), with maximums reaching 27°C (81°F) and minimums dropping as low as 4°C (39°F). This makes it an ideal time for travelers to enjoy a comfortable climate while exploring the area's attractions.

September Weather in Les Clees: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Les Clees, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Les Clees, September typically has an average temperature of 15°C (58°F), with highs reaching up to 27°C (81°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec333741485463656558504136
Data source: Temperature data for Les Clees 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 Les Clees

In Les Clees in September, the precipitation amount is 92 mm (3.6 in) over the course of 12 days.

September Precipitation Trends in Les Clees

The chart displays monthly precipitation patterns in Les Clees, 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 Les Clees, September typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec122971367116316014914992115110191
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Les Clees

In Les Clees in September humidity is 81%. With an average temperature of 15°C (58°F), this humidity feels like a mild, damp embrace that can make outdoor activities feel heavy and exhausting, requiring frequent breaks in the shade or a cool beverage to refresh yourself.

September Average Humidity in Les Clees

This chart illustrates the average monthly humidity levels in Les Clees, 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 Les Clees is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%84%80%82%82%77%81%89%89%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Les Clees

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

Maximum UV Index Levels in Les Clees for September

The chart shows the monthly maximum UV Index (UVI) for Les Clees 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 Les Clees typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367810986432
Data source: Les Clees 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 Les Clees Compares to Other Months

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

This table compares monthly weather conditions in Les Clees, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)122 mm (4.8 inches)91%low
February Weather3°C (38°F)97 mm (3.8 inches)89%moderate
March Weather5°C (42°F)136 mm (5.3 inches)87%high
April Weather9°C (48°F)71 mm (2.8 inches)84%high
May Weather12°C (54°F)163 mm (6.4 inches)80%very high
June Weather17°C (63°F)160 mm (6.3 inches)82%very high
July Weather19°C (66°F)149 mm (5.9 inches)82%very high
August Weather18°C (65°F)149 mm (5.9 inches)77%very high
September Weather15°C (58°F)92 mm (3.6 inches)81%high
October Weather10°C (51°F)115 mm (4.5 inches)89%moderate
November Weather5°C (41°F)110 mm (4.3 inches)89%moderate
December Weather2°C (36°F)191 mm (7.5 inches)91%low

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