Cayo Guillermo weather

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Usually in September
- 32
- 22
- 7
Weather by month
Now Today
- 30
- 8
5-day forecast

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The weather guide for Cayo Guillermo, Cuba shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

Which is the hottest month in Cayo Guillermo?

The hottest time of year in Cayo Guillermo is normally August. Expect maximum daytime temperatures to reach 33°C with very high heat and humidity.

Which month has the most rain in Cayo Guillermo?

In terms of rainfall, October is usually the wettest month in Cayo Guillermo with 182mm on average. There are normally 16 days in October with some rain.

When is it sunniest in Cayo Guillermo?

The sunniest time of year in Cayo Guillermo is normally March with bright sunshine on average for 68% of daylight hours; that's 8 hours of sunshine per day.

When is the sea warmest in Cayo Guillermo?

The sea is usually at its warmest in Cayo Guillermo in August when the water temperature reaches 29°C.

Metric (°C / mm) | Imperial (°F / inches)

Compare Cayo Guillermo weather with the USA

Below the Cayo Guillermo weather chart shows average maximum daytime temperature for Cayo Guillermo, Cuba and the USA (Washington).

Maximum daytime temperature (°C)

Cayo Guillermo, Cuba

USA (Washington)

Jan

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Metric (°C / mm) | Imperial (°F / inches)

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Tropical storm risk: Cayo Guillermo hurricane season

% of month affected by tropical storms

1.5%

1.9%

<1%

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The Cayo Guillermo tropical storm risk chart above shows the hurricane season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms