Cayo Guillermo
Cuba
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Cayo Guillermo, Cuba

The best months for a swim in Cayo Guillermo, Cuba, are February and April, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.
January, the same as December, is another warm winter month in Cayo Guillermo, Cuba, with temperature in the range of an average low of 17°C (62.6°F) and an average high of 27°C (80.6°F). With an average high-temperature of 27°C (80.6°F) and an average low-temperature of 17°C (62.6°F), January is the coldest month. Weather in January »

The last month of the winter, February, is also a moderately hot month in Cayo Guillermo, Cuba, with average temperature ranging between min 17°C (62.6°F) and max 28°C (82.4°F). The ideal sea water temperature of 25°C (77°F) and only 5 rainfall days, with 43mm (1.7") of accumulated rainfall, make February the best time for swimming and other water activities. Weather in February »

The first month of the spring, March, is still a warm month in Cayo Guillermo, Cuba, with temperature in the range of an average high of 29°C (84.2°F) and an average low of 18°C (64.4°F). In Cayo Guillermo, the average high-temperature in March is essentially the same as in February - a still moderately hot 29°C (84.2°F). Weather in March »

April in Cayo Guillermo, Cuba, is a hot spring month, with average temperature varying between 31°C (87.8°F) and 19°C (66.2°F). The ideal sea water temperature of 26°C (78.8°F) and only 5 rainfall days, with 60mm (2.4") of accumulated rainfall, make April the best time for swimming and other water activities. Weather in April »

May, the last month of the spring, in Cayo Guillermo, is another tropical month, with average temperature varying between 21°C (69.8°F) and 31°C (87.8°F). In May, the average high-temperature remains equal as in April - a still hot 31°C (87.8°F). Weather in May »

The first month of the summer, June, is still a hot month in Cayo Guillermo, Cuba, with average temperature varying between 32°C (89.6°F) and 23°C (73.4°F). In Cayo Guillermo, the average high-temperature is almost the same as in May - a still hot 32°C (89.6°F). Weather in June »

July, the same as June, in Cayo Guillermo, Cuba, is another hot summer month, with average temperature fluctuating between 23°C (73.4°F) and 33°C (91.4°F). The warmest months are July and August, with an average high-temperature of 33°C (91.4°F). In July, in Cayo Guillermo, the rain falls for 13 days. Weather in July »

The last month of the summer, August, is another hot month in Cayo Guillermo, Cuba, with average temperature fluctuating between 23°C (73.4°F) and 33°C (91.4°F). The warmest months are July and August, with an average high-temperature of 33°C (91.4°F). Weather in August »

September, the first month of the autumn, in Cayo Guillermo, is still a hot month, with average temperature varying between 32°C (89.6°F) and 22°C (71.6°F). In Cayo Guillermo, the average high-temperature in September is practically the same as in August - a still tropical 32°C (89.6°F). Weather in September »

October, the same as September, in Cayo Guillermo, Cuba, is another hot autumn month, with average temperature varying between 22°C (71.6°F) and 31°C (87.8°F). In October, the average high-temperature is almost the same as in September - a still hot 31°C (87.8°F). Weather in October »

November, the last month of the autumn, in Cayo Guillermo, is another warm month, with average temperature ranging between min 20°C (68°F) and max 29°C (84.2°F). In November, the average high-temperature is practically the same as in October - a moderately hot 29°C (84.2°F). Weather in November »

The first month of the winter, December, is still a warm month in Cayo Guillermo, Cuba, with temperature in the range of an average low of 18°C (64.4°F) and an average high of 28°C (82.4°F). In December, the average high-temperature is practically the same as in November - a still moderately hot 28°C (82.4°F). Weather in December »

What is the coldest month in Cayo Guillermo?

With an average high-temperature of 27°C (80.6°F) and an average low-temperature of 17°C (62.6°F), January is the coldest month in Cayo Guillermo.

How much does it rain in Cayo Guillermo?

Throughout the year, in Cayo Guillermo, Cuba, there are 125 rainfall days, and 1200mm (47.2") of precipitation is accumulated.

What are the months with the coldest sea water in Cayo Guillermo?

January through March, with an average sea temperature of 25°C (77°F), are months with the coldest seawater.

What is the month with the least sunshine in Cayo Guillermo?

Months with the least sunshine are January, February, June, September through December, with an average of 7h of sunshine.

What month has the most sunshine in Cayo Guillermo?

The month with the most sunshine is April, with an average of 9h of sunshine.

What are the months with the highest UV index in Cayo Guillermo?

Months with the highest UV index are April through August, with an average maximum UV index of 12.

What months are the sea warmest in Cayo Guillermo?

June through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.

When are the longest days in Cayo Guillermo?

June has the longest days of the year in Cayo Guillermo, Cuba, with an average of 13.5h of daylight.

What are the warmest months in Cayo Guillermo?

July and August, with an average high-temperature of 33°C (91.4°F), are warmest months.

What is the wettest month in Cayo Guillermo?

The month with the most rainfall is October when the rain falls for 16 days and typically aggregates up to 182mm (7.2") of precipitation.

What is the driest month in Cayo Guillermo?

December is the month with the least rainfall. Rain falls for 7 days and accumulates 39mm (1.5") of precipitation.

What is the month with the shortest days in Cayo Guillermo?

December has the shortest days of the year, with an average of 10.8h of daylight.

What is the month with the lowest UV index in Cayo Guillermo?

December is the month with the lowest UV index, with an average maximum UV index of 6.
Average rainfall - Cayo Guillermo, Cuba
Average rainfall days - Cayo Guillermo, Cuba
Average sea temperature - Cayo Guillermo, Cuba

Best months for swimming (with the highest average sea temperature) are June, July, August, September and October (29°C).
Coldest months (with the lowest average sea temperature) are January, February and March (25°C).

Average daylight / Average sunshine - Cayo Guillermo, Cuba

The month with the longest days is June (Average daylight: 13.5h).
The month with shortest days is December (Average daylight: 10.8h).

The month with most sunshine is April (Average sunshine: 9h).
Months with least sunshine are January, February, June, September, October, November and December (Average sunshine: 7).

Average UV index - Cayo Guillermo, Cuba