Dieppe weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Dieppe in September. Check more long-term weather averages for Dieppe in September before you book your next holiday to France in 2025/2026.

  • 19°C maximum daytime temperature in September in Dieppe19
    19°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in Dieppe13
    13 days with some rainfall
  • 12°C minimum night-time temperature in September in Dieppe12
    12°C min night temperature
  • 13 hours of daylight per day in September in Dieppe13
    13 hours of daylight per day
  • No heat & humidity in September in Dieppe0
    No heat & humidity
  • 68 mm monthly rainfall in September in Dieppe68
    68 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Dieppe4
    4 (Moderate) UV index
  • 18°C sea temperature in September in Dieppe18
    18°C sea temperature

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The September weather guide for France (Dieppe) 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 Dieppe in September?

Daytime temperatures usually reach 19°C in Dieppe in September, falling to 12°C at night.

How sunny is it in Dieppe in September?

There are normally 6 hours of bright sunshine each day in Dieppe in September - that's 45% of daylight hours.

How warm is the sea around Dieppe in September?

The average sea temperature around Dieppe in September is 18°C.

Does it rain in Dieppe in September?

There are usually 13 days with some rain in Dieppe in September and the average monthly rainfall is 68mm.

Dieppe September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:11 19:39
Monday, 15th September 2025 06:32 19:09
Tuesday, 30th September 2025 06:54 18:36

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