Dunkirk weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Dunkirk in September. Check more long-term weather averages for Dunkirk in September before you book your next holiday to France in 2025/2026.

  • 19°C maximum daytime temperature in September in Dunkirk19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in September in Dunkirk15
    15 days with some rainfall
  • 11°C minimum night-time temperature in September in Dunkirk11
    11°C min night temperature
  • 13 hours of daylight per day in September in Dunkirk13
    13 hours of daylight per day
  • No heat & humidity in September in Dunkirk0
    No heat & humidity
  • 65 mm monthly rainfall in September in Dunkirk65
    65 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Dunkirk4
    4 (Moderate) UV index
  • 17°C sea temperature in September in Dunkirk17
    17°C sea temperature

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The September weather guide for France (Dunkirk) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about France

How hot is it in Dunkirk in September?

Daytime temperatures usually reach 19°C in Dunkirk in September, falling to 11°C at night.

How sunny is it in Dunkirk in September?

There are normally 5 hours of bright sunshine each day in Dunkirk in September - that's 40% of daylight hours.

How warm is the sea around Dunkirk in September?

The average sea temperature around Dunkirk in September is 17°C.

Does it rain in Dunkirk in September?

There are usually 15 days with some rain in Dunkirk in September and the average monthly rainfall is 65mm.

Dunkirk September sunrise & sunset times

Browse the sunrise and sunset times for Dunkirk in September 2025. Select a month to view Dunkirk sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:04 19:36
Monday, 15th September 2025 06:26 19:04
Tuesday, 30th September 2025 06:50 18:30

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