Calais weather in August 2026

Expect daytime maximum temperatures of 21°C in Calais, France in August based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 50 mm of rainfall in the month.

  • 21°C maximum daytime temperature in August in Calais21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in August in Calais12
    12 days with some rainfall
  • 13°C minimum night-time temperature in August in Calais13
    13°C min night temperature
  • 14 hours of daylight per day in August in Calais14
    14 hours of daylight per day
  • No heat & humidity in August in Calais0
    No heat & humidity
  • 50 mm monthly rainfall in August in Calais50
    50 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Calais6
    6 (High) UV index
  • 18°C sea temperature in August in Calais18
    18°C sea temperature

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The August 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Calais in August?

Daytime temperatures usually reach 21°C in Calais in August, falling to 13°C at night.

How sunny is it in Calais in August?

There are normally 7 hours of bright sunshine each day in Calais in August - that's 48% of daylight hours.

How warm is the sea around Calais in August?

The average sea temperature around Calais in August is 18°C.

Does it rain in Calais in August?

There are usually 12 days with some rain in Calais in August and the average monthly rainfall is 50mm.

Calais August sunrise & sunset times

Browse the sunrise and sunset times for Calais in August 2026. Select a month to view Calais sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 05:18 20:39
Sunday, 16th August 2026 05:41 20:12
Monday, 31st August 2026 06:04 19:40

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