Cayo Guillermo weather in August 2025

Expect 91°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Cayo Guillermo in August. Check more long-term weather averages for Cayo Guillermo in August before you book your next holiday to Cuba in 2025/2026.

  • 91°F maximum daytime temperature in August in Cayo Guillermo91
    91°F max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in August in Cayo Guillermo15
    15 days with some rainfall
  • 73°F minimum night-time temperature in August in Cayo Guillermo73
    73°F min night temperature
  • 13 hours of daylight per day in August in Cayo Guillermo13
    13 hours of daylight per day
  • Very high heat & humidity in August in Cayo GuillermoVH
    Very High heat & humidity
  • 4.6 inches monthly rainfall in August in Cayo Guillermo4.6
    4.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Cayo Guillermo11
    11+ (Extreme) UV index
  • 84°F sea temperature in August in Cayo Guillermo84
    84°F sea temperature

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The August weather guide for Cuba (Cayo Guillermo) 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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How hot is it in Cayo Guillermo in August?

Daytime temperatures usually reach 91°F in Cayo Guillermo in August with very high heat and humidity, falling to 73°F at night.

How sunny is it in Cayo Guillermo in August?

There are normally 8 hours of bright sunshine each day in Cayo Guillermo in August - that's 61% of daylight hours.

How warm is the sea around Cayo Guillermo in August?

The average sea temperature around Cayo Guillermo in August is 84°F.

Does it rain in Cayo Guillermo in August?

There are usually 15 days with some rain in Cayo Guillermo in August and the average monthly rainfall is 4.6 inches.

What is the chance of a hurricane in Cayo Guillermo in August?

On average less than 1 day in August in Cayo Guillermo is likely to be affected by the passage of one or more tropical storms.

Cayo Guillermo August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:46 18:55
Saturday, 16th August 2025 05:52 18:45
Sunday, 31st August 2025 05:57 18:32

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