Galissas weather in August 2025

Expect 27°C daytime maximum temperatures in the shade with on average 13 hours of sunshine per day in Galissas in August based on long-term weather averages. There is usually 1 day with some rainfall and 2 mm of average monthly rainfall in August.

  • 27°C maximum daytime temperature in August in Galissas27
    27°C max day temperature
  • 13 hours of sunshine per day
  • 1 day with some rainfall in August in Galissas1
    1 day with some rainfall
  • 21°C minimum night-time temperature in August in Galissas21
    21°C min night temperature
  • 14 hours of daylight per day in August in Galissas14
    14 hours of daylight per day
  • Moderate heat & humidity in August in GalissasM
    Moderate heat & humidity
  • 2 mm monthly rainfall in August in Galissas2
    2 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Galissas9
    9 (Very High) UV index
  • 24°C sea temperature in August in Galissas24
    24°C sea temperature

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The August weather guide for Syros, represented by Galissas, (Galissas) 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 Galissas in August?

Daytime temperatures usually reach 27°C in Galissas in August with moderate heat and humidity, falling to 21°C at night.

How sunny is it in Galissas in August?

There are normally 13 hours of bright sunshine each day in Galissas in August - that's 92% of daylight hours.

How warm is the sea around Galissas in August?

The average sea temperature around Galissas in August is 24°C.

Does it ever rain in Galissas in August?

There is usually 1 day with some rain in Galissas in August and the average monthly rainfall is 2mm.

Galissas August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:25 19:28
Saturday, 16th August 2025 05:37 19:11
Sunday, 31st August 2025 05:50 18:51

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