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September Weather in Chatelais, France

Last updated: August 23, 2025

In September, the average temperature in Chatelais, France hovers around 17°C (62°F), with a minimum dip to 4°C (40°F) and a maximum rise to 34°C (94°F). Expect approximately 48 mm (1.9 in) of precipitation over 9 days, accompanied by an average humidity level of 75%.

September Temperature in Chatelais

In September in Chatelais, the average temperature is 17°C (62°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 4°C (40°F). This climate makes it ideal for travelers seeking to enjoy mild days and cool evenings.

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

The chart illustrates September temperature patterns in Chatelais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chatelais, September typically has an average temperature of 17°C (62°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec424548525865686762554745
Data source: Temperature data for Chatelais 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 Chatelais

In Chatelais in September, the total precipitation amount is 48 mm (1.9 in) spread over 9 days.

September Precipitation Trends in Chatelais

The chart displays monthly precipitation patterns in Chatelais, 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 Chatelais, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec496263486496434548837599
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chatelais

In Chatelais 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 Chatelais

This chart illustrates the average monthly humidity levels in Chatelais, 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 Chatelais is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%84%83%81%75%65%67%75%85%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chatelais

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

Maximum UV Index Levels in Chatelais for September

The chart shows the monthly maximum UV Index (UVI) for Chatelais 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 Chatelais typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986422
Data source: Chatelais 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 Chatelais Compares to Other Months

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

This table compares monthly weather conditions in Chatelais, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)49 mm (1.9 inches)88%low
February Weather7°C (45°F)62 mm (2.5 inches)87%moderate
March Weather9°C (48°F)63 mm (2.5 inches)84%moderate
April Weather11°C (53°F)48 mm (1.9 inches)83%high
May Weather14°C (58°F)64 mm (2.5 inches)81%very high
June Weather18°C (65°F)96 mm (3.8 inches)75%very high
July Weather20°C (68°F)43 mm (1.7 inches)65%very high
August Weather19°C (67°F)45 mm (1.8 inches)67%very high
September Weather17°C (62°F)48 mm (1.9 inches)75%high
October Weather13°C (56°F)83 mm (3.3 inches)85%moderate
November Weather8°C (47°F)75 mm (3.0 inches)88%low
December Weather7°C (45°F)99 mm (3.9 inches)90%low

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