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September Weather in Dunkerque, France

Last updated: August 23, 2025

In September, the average temperature in Dunkerque, France hovers around 16°C (61°F), with a pleasant range from a minimum of 5°C (42°F) to a maximum of 31°C (88°F). Expect about 49 mm (1.9 in) of precipitation spread over 8 days, along with an average humidity level of 80%. Be prepared for a mix of mild and wet days!

September Temperature in Dunkerque

In September in Dunkerque, the average temperature is 16°C (61°F). The maximum can reach 31°C (88°F), while the minimum can drop as low as 5°C (42°F). It's advisable to pack layers to accommodate the varying temperatures during your travels.

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

The chart illustrates September temperature patterns in Dunkerque, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dunkerque, September typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (88°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346505663666661554744
Data source: Temperature data for Dunkerque 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 Dunkerque

In Dunkerque in September, the precipitation amount is 49 mm (1.9 in) spread over 8 days.

September Precipitation Trends in Dunkerque

The chart displays monthly precipitation patterns in Dunkerque, 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 Dunkerque, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec595557356268527249795490
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dunkerque

In Dunkerque 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 Dunkerque

This chart illustrates the average monthly humidity levels in Dunkerque, 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 Dunkerque 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 Dunkerque

In Dunkerque 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 Dunkerque.

Maximum UV Index Levels in Dunkerque for September

The chart shows the monthly maximum UV Index (UVI) for Dunkerque 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 Dunkerque typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Dunkerque 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 Dunkerque Compares to Other Months

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

This table compares monthly weather conditions in Dunkerque, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)59 mm (2.3 inches)91%low
February Weather6°C (43°F)55 mm (2.2 inches)89%low
March Weather8°C (46°F)57 mm (2.2 inches)86%moderate
April Weather10°C (50°F)35 mm (1.4 inches)85%moderate
May Weather13°C (56°F)62 mm (2.4 inches)82%high
June Weather17°C (63°F)68 mm (2.7 inches)81%very high
July Weather19°C (66°F)52 mm (2.0 inches)76%very high
August Weather19°C (66°F)72 mm (2.8 inches)73%high
September Weather16°C (61°F)49 mm (1.9 inches)80%moderate
October Weather13°C (56°F)79 mm (3.1 inches)89%moderate
November Weather9°C (48°F)54 mm (2.1 inches)92%low
December Weather7°C (44°F)90 mm (3.6 inches)92%low

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