Boulogne weather in August 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Boulogne in August. Check more long-term weather averages for Boulogne in August before you book your next holiday to France in 2025/2026.

  • 21°C maximum daytime temperature in August in Boulogne21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in August in Boulogne12
    12 days with some rainfall
  • 13°C minimum night-time temperature in August in Boulogne13
    13°C min night temperature
  • 14 hours of daylight per day in August in Boulogne14
    14 hours of daylight per day
  • No heat & humidity in August in Boulogne0
    No heat & humidity
  • 52 mm monthly rainfall in August in Boulogne52
    52 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Boulogne6
    6 (High) UV index
  • 18°C sea temperature in August in Boulogne18
    18°C sea temperature

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The August weather guide for France (Boulogne) 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 Boulogne in August?

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

How sunny is it in Boulogne in August?

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

How warm is the sea around Boulogne in August?

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

Does it rain in Boulogne in August?

There are usually 12 days with some rain in Boulogne in August and the average monthly rainfall is 52mm.

Boulogne August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:20 20:38
Saturday, 16th August 2025 05:43 20:11
Sunday, 31st August 2025 06:06 19:40

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