nomadseason

September Weather in Le Portel, France

Last updated: August 23, 2025

In September, the average temperature in Le Portel, France hovers around 16°C (61°F). Expect a minimum of 8°C (46°F) and a pleasant maximum of 26°C (79°F). With an average humidity of 80%, you may want to prepare for some muggy days. Be ready for 67 mm (2.7 in) of precipitation spread over 11 days, ensuring your umbrella is handy!

September Temperature in Le Portel

In September in Le Portel, the average temperature is 16°C (61°F). Maximums can reach 26°C (79°F) and minimums can be as low as 8°C (46°F). This pleasant climate makes it an ideal time for outdoor activities and exploration.

September Weather in Le Portel: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Le Portel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Le Portel, September typically has an average temperature of 16°C (61°F), with highs reaching up to 26°C (79°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec434446495460646461564946
Data source: Temperature data for Le Portel generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Le Portel

In Le Portel in September, the total precipitation amount is 67 mm (2.7 in) spread over a duration of 11 days.

September Precipitation Trends in Le Portel

The chart displays monthly precipitation patterns in Le Portel, 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 Le Portel, September typically receives around 67 mm (2.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec817473316167497467123104143
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Le Portel

In Le Portel in September, humidity is 80%. With an average temperature of 16°C (61°F), this humidity feels like a warm blanket wrapped around you, making sightseeing a sweat-inducing challenge but also lending a lush vibrancy to the surroundings that can enhance your travel experience.

September Average Humidity in Le Portel

This chart illustrates the average monthly humidity levels in Le Portel, 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 Le Portel is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Le Portel

In Le Portel in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Le Portel.

Maximum UV Index Levels in Le Portel for September

The chart shows the monthly maximum UV Index (UVI) for Le Portel 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 Le Portel typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578875421
Data source: Le Portel 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 Le Portel Compares to Other Months

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

This table compares monthly weather conditions in Le Portel, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)81 mm (3.2 inches)91%low
February Weather7°C (44°F)74 mm (2.9 inches)89%low
March Weather8°C (46°F)73 mm (2.9 inches)86%moderate
April Weather10°C (50°F)31 mm (1.2 inches)85%moderate
May Weather12°C (54°F)61 mm (2.4 inches)82%high
June Weather16°C (61°F)67 mm (2.6 inches)81%very high
July Weather18°C (64°F)49 mm (1.9 inches)76%very high
August Weather18°C (65°F)74 mm (2.9 inches)73%high
September Weather16°C (61°F)67 mm (2.7 inches)80%moderate
October Weather13°C (57°F)123 mm (4.8 inches)89%moderate
November Weather10°C (49°F)104 mm (4.1 inches)92%low
December Weather8°C (46°F)143 mm (5.6 inches)92%low

Compare Le Portel's Climate with Cities Worldwide