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September Weather in Cornillon, France

Last updated: August 23, 2025

In Cornillon, France, the average temperature in September is a pleasant 21°C (70°F). Expect temperatures to range from a refreshing 9°C (48°F) to a warm 35°C (95°F). During this month, you can anticipate about 52 mm (2.0 in) of precipitation over approximately 5 days, with an average humidity of 72%.

September Temperature in Cornillon

In September in Cornillon, the average temperature is 21°C (70°F), with maximums reaching 35°C (95°F) and minimums dipping as low as 9°C (48°F). This makes Cornillon an ideal destination for travelers seeking mild weather with the chance to enjoy warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Cornillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cornillon, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec434851576473787770605145
Data source: Temperature data for Cornillon 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 Cornillon

In Cornillon in September, the precipitation amount is 52 mm (2.0 in) over a span of 5 days.

September Precipitation Trends in Cornillon

The chart displays monthly precipitation patterns in Cornillon, 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 Cornillon, September typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec45378182985944495213014384
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cornillon

In Cornillon in September, humidity is 72%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and sweaty, but still manageable for traveling if you stay hydrated and take regular breaks in the shade.

September Average Humidity in Cornillon

This chart illustrates the average monthly humidity levels in Cornillon, 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 Cornillon is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%88%84%81%77%76%68%61%72%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cornillon

In Cornillon in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Cornillon.

Maximum UV Index Levels in Cornillon for September

The chart shows the monthly maximum UV Index (UVI) for Cornillon 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 Cornillon typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
Data source: Cornillon 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 Cornillon Compares to Other Months

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

This table compares monthly weather conditions in Cornillon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)45 mm (1.8 inches)91%low
February Weather9°C (48°F)37 mm (1.5 inches)88%moderate
March Weather11°C (52°F)81 mm (3.2 inches)84%moderate
April Weather14°C (57°F)82 mm (3.2 inches)81%high
May Weather18°C (65°F)98 mm (3.8 inches)77%very high
June Weather23°C (73°F)59 mm (2.3 inches)76%very high
July Weather26°C (78°F)44 mm (1.7 inches)68%very high
August Weather25°C (77°F)49 mm (1.9 inches)61%very high
September Weather21°C (70°F)52 mm (2.0 inches)72%high
October Weather16°C (61°F)130 mm (5.1 inches)88%moderate
November Weather10°C (51°F)143 mm (5.6 inches)91%moderate
December Weather7°C (45°F)84 mm (3.3 inches)92%low

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