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September Weather in Chillon, Spain

Last updated: August 27, 2025

In Chillon, Spain, the average temperature in September hovers around 23°C (74°F). Temperatures can range from a cool 10°C (50°F) to a sweltering 37°C (98°F). Expect some rain, with a total precipitation of 25 mm (1.0 in) spread over 4 days. Additionally, the climate maintains an average humidity level of 53%, ensuring a comfortable atmosphere for visitors and locals alike.

September Temperature in Chillon

In September in Chillon, the average temperature is 23°C (74°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 10°C (50°F). This makes it an ideal time for travelers seeking a warm climate with a bit of variability for outdoor activities.

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

The chart illustrates September temperature patterns in Chillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chillon, September typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec445053576775828274645247
Data source: Temperature data for Chillon 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 Chillon

In Chillon in September, the precipitation amount is 25 mm (1.0 in) over the course of 4 days.

September Precipitation Trends in Chillon

The chart displays monthly precipitation patterns in Chillon, 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 Chillon, September typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec39357878301071225547265
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chillon

In Chillon in September, humidity is 53%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making it comfortable for exploring the sights while still requiring occasional breaks in the shade to stay refreshed.

September Average Humidity in Chillon

This chart illustrates the average monthly humidity levels in Chillon, 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 Chillon is approximately 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%78%66%60%56%44%44%42%53%70%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chillon

In Chillon in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Chillon.

Maximum UV Index Levels in Chillon for September

The chart shows the monthly maximum UV Index (UVI) for Chillon 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 Chillon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3479101111109743
Data source: Chillon 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 Chillon Compares to Other Months

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

This table compares monthly weather conditions in Chillon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)39 mm (1.5 inches)85%moderate
February Weather10°C (50°F)35 mm (1.4 inches)78%moderate
March Weather11°C (53°F)78 mm (3.1 inches)66%high
April Weather14°C (57°F)78 mm (3.1 inches)60%very high
May Weather19°C (67°F)30 mm (1.2 inches)56%very high
June Weather24°C (75°F)10 mm (0.4 inches)44%extreme
July Weather28°C (82°F)7 mm (0.3 inches)44%extreme
August Weather28°C (82°F)12 mm (0.5 inches)42%very high
September Weather23°C (74°F)25 mm (1.0 inches)53%very high
October Weather18°C (64°F)54 mm (2.1 inches)70%high
November Weather11°C (52°F)72 mm (2.8 inches)83%moderate
December Weather9°C (48°F)65 mm (2.5 inches)86%moderate

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