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September Weather in Marennes, France

Last updated: August 23, 2025

In September, the average temperature in Marennes, France hovers around 19°C (66°F), with fluctuations ranging from a minimum of 7°C (45°F) to a maximum of 35°C (96°F). This period also sees 46 mm (1.8 in) of precipitation spread over 9 days, accompanied by an average humidity of 76%, creating a climate that is both vibrant and refreshing.

September Temperature in Marennes

In September in Marennes, the average temperature is 19°C (66°F). The maximum can reach 35°C (96°F), while the minimum can drop to as low as 7°C (45°F). It's a great time to visit for pleasant weather and a range of outdoor activities.

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

The chart illustrates September temperature patterns in Marennes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marennes, September typically has an average temperature of 19°C (66°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec444851556168727066595047
Data source: Temperature data for Marennes 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 Marennes

In Marennes in September, the precipitation amount is 46 mm (1.8 in) over the course of 9 days.

September Precipitation Trends in Marennes

The chart displays monthly precipitation patterns in Marennes, 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 Marennes, September typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6367755081723227468192117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Marennes

In Marennes in September, humidity is 76%. With an average temperature of 19°C (66°F), this humidity feels like a warm, thick blanket wrapping around you, making travel mildly uncomfortable and encouraging frequent breaks in shaded or air-conditioned areas.

September Average Humidity in Marennes

This chart illustrates the average monthly humidity levels in Marennes, 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 Marennes is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%82%82%80%76%73%76%82%83%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Marennes

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

Maximum UV Index Levels in Marennes for September

The chart shows the monthly maximum UV Index (UVI) for Marennes 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 Marennes typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789986532
Data source: Marennes 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 Marennes Compares to Other Months

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

This table compares monthly weather conditions in Marennes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)63 mm (2.5 inches)85%low
February Weather9°C (48°F)67 mm (2.6 inches)83%moderate
March Weather10°C (51°F)75 mm (2.9 inches)82%moderate
April Weather13°C (56°F)50 mm (2.0 inches)82%high
May Weather16°C (61°F)81 mm (3.2 inches)82%very high
June Weather20°C (68°F)72 mm (2.9 inches)80%very high
July Weather22°C (72°F)32 mm (1.2 inches)76%very high
August Weather21°C (71°F)27 mm (1.1 inches)73%very high
September Weather19°C (66°F)46 mm (1.8 inches)76%high
October Weather15°C (59°F)81 mm (3.2 inches)81%moderate
November Weather10°C (50°F)91 mm (3.6 inches)83%moderate
December Weather9°C (48°F)117 mm (4.6 inches)85%low

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