Calais weather in September 2025

Expect 66°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Calais in September. Check more long-term weather averages for Calais in September before you book your next holiday to France in 2025/2026.

  • 66°F maximum daytime temperature in September in Calais66
    66°F max day temperature
  • 5 hours of sunshine per day
  • 14 days with some rainfall in September in Calais14
    14 days with some rainfall
  • 52°F minimum night-time temperature in September in Calais52
    52°F min night temperature
  • 13 hours of daylight per day in September in Calais13
    13 hours of daylight per day
  • No heat & humidity in September in Calais0
    No heat & humidity
  • 2.5 inches monthly rainfall in September in Calais2.5
    2.5 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Calais4
    4 (Moderate) UV index
  • 63°F sea temperature in September in Calais63
    63°F sea temperature

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The September weather guide for France (Calais) 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)  |  Imperial (°F)

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More about France

How hot is it in Calais in September?

Daytime temperatures usually reach 66°F in Calais in September, falling to 52°F at night.

How sunny is it in Calais in September?

There are normally 5 hours of bright sunshine each day in Calais in September - that's 41% of daylight hours.

How warm is the sea around Calais in September?

The average sea temperature around Calais in September is 63°F.

Does it rain in Calais in September?

There are usually 14 days with some rain in Calais in September and the average monthly rainfall is 2.5 inches.

Calais September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:06 19:38
Monday, 15th September 2025 06:28 19:06
Tuesday, 30th September 2025 06:52 18:32

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